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Centrifugal Casting of High Speed Steel/Nodular Cast Iron Compound Roll Collar 被引量:3
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作者 FU Han-guang ZHAO Ai-min +1 位作者 XING Jian-dong FU Ding-mei 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2002年第1期32-35,共4页
The centrifugal casting of compound HSS/nodular cast iron roll collar was studied,and the factors affecting transition zone quality were analyzed.The pouring temperature and interval in pouring are the main factors af... The centrifugal casting of compound HSS/nodular cast iron roll collar was studied,and the factors affecting transition zone quality were analyzed.The pouring temperature and interval in pouring are the main factors affecting transition zone quality.By controlling process parameter and flux adding during casting,high quality roll collar was obtained.The cause,why in the casting of HSS part,segregation appears easily,was analyzed and the countermeasure eliminating segregation was put forward,the measure eliminating heat treatment crackling was also put forward. 展开更多
关键词 high-speed steel nodular cast iron centrifugal compound casting combining layer roll collar
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Effect of scanning speed during PTA remelting treatment on the microstructure and wear resistance of nodular cast iron 被引量:6
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作者 Hua-tang Cao Xuan-pu Dong +3 位作者 Qi-wen Huang Zhang Pan Jian-jun Li Zi-tian Fan 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2014年第4期363-370,共8页
The surface of nodular cast iron (NCI) with a ferrite substrate was rapidly remelted and solidified by plasma transferred arc (PTA) to induce a chilled structure with high hardness and favorable wear resistance. T... The surface of nodular cast iron (NCI) with a ferrite substrate was rapidly remelted and solidified by plasma transferred arc (PTA) to induce a chilled structure with high hardness and favorable wear resistance. The effect of scanning speed on the microstructure, micro-hardness distribution, and wear properties of PTA-remelted specimens was systematically investigated. Microstructural characterization in-dicated that the PTA remelting treatment could dissolve most graphite nodules and that the crystallized primary austenite dendrites were transformed into cementite, martensite, an interdendritic network of ledeburite eutectic, and certain residual austenite during rapid solidifica-tion. The dimensions of the remelted zone and its dendrites increase with decreased scanning speed. The microhardness of the remelted zone varied in the range of 650 HV0.2 to 820 HV0.2, which is approximately 2.3-3.1 times higher than the hardness of the substrate. The wear re-sistance of NCI was also significantly improved after the PTA remelting treatment. 展开更多
关键词 nodular cast iron surface treatment plasma arc remelting scanning speed MICROHARDNESS wear resistance
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Effects of Light and Heavy Rare Earths on Anti-Degradation of Nodular Cast Iron 被引量:4
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作者 王丽萍 郭二军 +2 位作者 陈洪彬 王敬泽 李大勇 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第1期103-107,共5页
The effects of rare earths with different contents on anti-degradation of Y base heavy rare earths-magnesium and cerium base light rare earths-magnesium nodular cast iron were studied. Curves of the relationship betwe... The effects of rare earths with different contents on anti-degradation of Y base heavy rare earths-magnesium and cerium base light rare earths-magnesium nodular cast iron were studied. Curves of the relationship between the spheroidization grade of liguid iron treated by different nodulizers and holding time were obtained. The results show that the more the remains of the rare earth, the longer the anti-degradation time, the liquid iron was treated either by Y-Mg-Si or by Ce-Mg-Si nodulizer. When the rare earth remains are above certain quantity, the spheroidization grade starts to decline. When liquid iron treated by either Y-Mg-Si or Ce-Mg-Si nodulizer with proper remains of rare earths about 0.04% 0.06%(mass fraction), the anti-degradation is the best, and the remains of Mg being about 0.04% -0.07% (mass fraction). Rare earths-Mg nodulizer with moderate RE remains is better than that of Mg-Si nodulizer in anti-degradation property. However, Y-Mg-Si nodulizer with moderate remins of Re is better than Ce-Mg-Si nodulizer. Sometimes Ce-Mg- Si nodulizer can be used for the production of heavy section nodular cast iron. 展开更多
关键词 metal materials nodular cast iron anti-degradation Ce base light rare earths heavy rare earths
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SIZE DISTRIBUTION AND BEHAVIOUR OF VC PARTICLES IN FERRITIC NODULAR CAST IRON 被引量:1
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作者 WANG Yu SONG Weixi HAN Qiyong University of Science and Technology Beijing,Beijing,China The Institute of Precise and Special New Materials, University of Science and Technology Beijing,Beijing 100083,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1993年第8期92-97,共6页
Size distribution and precipitation of VC particles in ferritic nodular cast iron have been examined by techniques of ultrasonic screening,small angle X-ray scattering and chemical dissolution.The VC particles are siz... Size distribution and precipitation of VC particles in ferritic nodular cast iron have been examined by techniques of ultrasonic screening,small angle X-ray scattering and chemical dissolution.The VC particles are sized over a wide range.The superfine ones, dispersed in the ferritic matrix,are the majority.A saturated dispersion with ultrafine VC particles may be approached as the V content increasing in the iron.Thi5 seems to play an important role in the precipitation strengthening for ferritic nodular cast iron. 展开更多
关键词 nodular cast iron FERRITE size distribution VC particle
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Strength distribution at interface of rotary-friction-welded aluminum to nodular cast iron 被引量:2
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作者 宋雨来 刘耀辉 +2 位作者 朱先勇 于思荣 张英波 《中国有色金属学会会刊:英文版》 EI CSCD 2008年第1期14-18,共5页
The morphology,size and composition of intermetallic compound at the interface of Al 1050 and nodular cast iron were studied by electron microprobe analysis(EMPA)and scan electron microscopy(SEM),respectively.The bond... The morphology,size and composition of intermetallic compound at the interface of Al 1050 and nodular cast iron were studied by electron microprobe analysis(EMPA)and scan electron microscopy(SEM),respectively.The bond strength of the interface was measured by the tensile tests and the morphology of the fracture surface was observed by SEM.The observation of the interface reveals that there are two distinct morphologies:no intermetallic compound exists in the central area at the interface;while numbers of intermetallic compounds(FexAly)are formed in the peripheral area due to the overfull heat input.The tensile tests indicate that the distribution of strength in radial direction at the interface is inhomogeneous,and the central area of the interface performs greater bond strength than the peripheral area,which proves directly that the FexAly intermetallic compounds have a negative effect on the integration of interface.The morphology on the fracture surface shows that the facture in the central area at the interface has characteristic of the ductile micro-void facture.So it is important to restrain the form of the intermetallic compound to increase the bond strength of the Al 1050 and nodular cast iron by optimizing welding parameters and the geometry of components. 展开更多
关键词 铸型 焊接技术 铝合金 显微结构
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PIXE ANALYSIS OF GRAPHITE PHASE IN NODULAR CAST IRON
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作者 钟溟 冯松林 +5 位作者 王禹 任闽秦 刘年庆 张晓峰 焉伶娜 韩其勇 《Nuclear Science and Techniques》 SCIE CAS CSCD 1992年第3期210-215,共6页
The graphite phase has been extracted from the nodular cast iron to measure the concentration of trace element in it. The impurity phase was removed from the extracted matter by dissolving it with HCl and HCl+H<sub... The graphite phase has been extracted from the nodular cast iron to measure the concentration of trace element in it. The impurity phase was removed from the extracted matter by dissolving it with HCl and HCl+H<sub>2</sub>O<sub>2</sub> to get the pure graphite phase. PIXE measurements were performed with thick targets of the pure graphite phase. Differences in the trace element concentrations between the graphite phase and the matrix have been observed. The effect of Ti and As in graphite phase on the nodularization rate and the mechanical properties have been studied. 展开更多
关键词 PIXE GRAPHITE phase nodular cast iron TRACE elements
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LASER ALLOYING ON CHROMIUM-COATED SURFACE OF NODULAR CAST IRON
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作者 Wei, Lumei Deng, Liyan 《中国有色金属学会会刊:英文版》 EI CSCD 1998年第3期141-144,共4页
1INTRODUCTIONLaseraloyingtreatmentmakeslaserbeamheat,andmeltorsolidifymetalsurfacequicklybyheatingconduction... 1INTRODUCTIONLaseraloyingtreatmentmakeslaserbeamheat,andmeltorsolidifymetalsurfacequicklybyheatingconductioninitsownbody.Duet... 展开更多
关键词 nodular cast iron CHROMIUM coating LASER ALLOYING surface modification wear resistance
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Microstructural analysis of EN-GJS-450-10 ductile cast iron via vibrational casting
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作者 Caglar Yüksel 《China Foundry》 SCIE 2020年第4期272-278,共7页
EN-GJS-450-10 ductile cast iron was produced with and without vibration to evaluate microstructural features. To investigate the effect of vibration, a reference, and two different castings having amplitudes of 0.9 mm... EN-GJS-450-10 ductile cast iron was produced with and without vibration to evaluate microstructural features. To investigate the effect of vibration, a reference, and two different castings having amplitudes of 0.9 mm and 1.8 mm were cast with a fixed vibration frequency of 50 Hz. The nodule count (density), form (type), size distribution, nodularity, and the fraction of graphite, percentages of both ferrite and pearlite phases, length of ferrite shell, and pore, were evaluated via optical microscopy using an image analysis software. It is observed that the microstructure of the cast iron is more uniform by vibrational casting than that by non-vibrational casting. Additionally, mechanical vibration enhances nodule count and nodularity, also, more ferritic matrix could be obtained after the application of vibration. Nodule count and nodularity of vibrational casting with 1.8 mm amplitude increased from 226 nodule per mm2 and 80% to 311 nodule per mm2 and 86.5% of non-vibrational casting. Percentages of ferrite and graphite area dramatically improved from 24% and 16.5% for non-vibrational casting to 57% and 22.3% for vibrational casting with 1.8 mm amplitude, whereas the percentages of pearlite and pores decreased significantly from 56.1% and 5% to 20% and 1%, respectively. 展开更多
关键词 mechanical vibration spheroidal cast iron ductile iron nodularITY image analysis AMPLITUDE
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基于AnyCasting的机床滑块铸造模拟及工艺优化 被引量:7
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作者 尹起 盛文斌 张振波 《热加工工艺》 CSCD 北大核心 2017年第17期102-104,106,共4页
采用铸造模拟软件Any Casting对球墨铸铁机床滑块铸件进行充型、凝固过程模拟。根据铸件金属液的凝固规律,分析出缺陷的分布;通过增大冒口和添加冷铁,改进了工艺方案。模拟结果表明,工艺改进后铸件导轨处的凝固时间明显缩短,顶部缩松缩... 采用铸造模拟软件Any Casting对球墨铸铁机床滑块铸件进行充型、凝固过程模拟。根据铸件金属液的凝固规律,分析出缺陷的分布;通过增大冒口和添加冷铁,改进了工艺方案。模拟结果表明,工艺改进后铸件导轨处的凝固时间明显缩短,顶部缩松缩孔缺陷被完全消除。该研究对同类铸件的工艺设计具有一定的参考价值和指导意义。 展开更多
关键词 机床滑块 球墨铸铁 铸造模拟
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Thermal conductivity of cast iron-A review 被引量:7
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作者 Guang-hua Wang Yan-xiang Li 《China Foundry》 SCIE 2020年第2期85-95,共11页
This paper gives a brief introduction to the four research methods for the study on thermal conductivity of cast irons,including experimental measurement,statistical analysis,effective medium theory and numerical simu... This paper gives a brief introduction to the four research methods for the study on thermal conductivity of cast irons,including experimental measurement,statistical analysis,effective medium theory and numerical simulation.Recent studies on the thermal conductivity of various cast irons are reviewed through the influence of alloying elements,structural constituents,and temperature.The addition of alloying elements is the main reason that restricts the thermal conductivity of cast irons,especially spheroidal graphite cast iron.The connectivity of graphite has a significant effect on the thermal conductivity of flake and compacted graphite cast irons,semiquantitative and quantitative analysis of this factor is a key and difficult point in the study of thermal conductivity of cast irons.The thermal conductivities of different types of cast irons show varying degrees of dependence on temperature.This phenomenon is the combination of graphite and matrix,rather than just depending on graphite morphology.The study of the relationship between individual phase and temperature is the focus of future research.These summaries and discussions may provide reference and guidance for the future research and development of high thermal conductivity cast irons. 展开更多
关键词 cast iron thermal conductivity GRAY cast iron nodular castiron COMPACTED graphite cast iron
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MICROCOMPUTER PICTURE PROCESSING SYSTEM OF CAST-IRON METALLOGRAPHIC STRUCTURE 被引量:1
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作者 Wang Zhiping Lu Yang Xu Jianling Gansu University of Technology 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 1997年第4期45-49,共3页
The development of computer picture processing technique in metallography analysis is dealed with and a picture processing procedure fit to metallography analysis is developed. The image processing of nodular cast iro... The development of computer picture processing technique in metallography analysis is dealed with and a picture processing procedure fit to metallography analysis is developed. The image processing of nodular cast iron is carried out with this system 展开更多
关键词 METALLOGRAPHY nodular cast iron Image processing MICROCOMPUTER Microstructure analysis
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基于ProCAST的熔胶座移动板浇注系统模拟优化 被引量:6
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作者 董文正 邓志儒 +1 位作者 林启权 高宗为 《热加工工艺》 CSCD 北大核心 2016年第3期74-76,79,共4页
基于ProCAST仿真平台对QT500-7熔胶座移动板进行了充型与凝固模拟及浇注系统的优化设计。鉴于铸件在充型过程中的氧化夹渣与冒口对铸件质量影响很大,因此对铸造过程中的流动场和温度场进行了研究。结果表明,良好的流道可以保证低的氧化... 基于ProCAST仿真平台对QT500-7熔胶座移动板进行了充型与凝固模拟及浇注系统的优化设计。鉴于铸件在充型过程中的氧化夹渣与冒口对铸件质量影响很大,因此对铸造过程中的流动场和温度场进行了研究。结果表明,良好的流道可以保证低的氧化夹渣,同时合理的冒口可以降低铸件的缩孔与缩松。该结果对同类铸件工艺设计具有一定的参考价值和指导意义。 展开更多
关键词 球墨铸铁 熔胶座移动板 铸造模拟 优化设计
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基于ProCAST球墨铸铁支座的铸造工艺优化 被引量:2
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作者 黄雪红 季德生 《现代铸铁》 CAS 2022年第4期29-35,共7页
以支座为研究对象,分析支座的工艺性和结构特点,制定初始铸造工艺方案,运用数值模拟软件ProCAST对初始铸造工艺方案进行模拟,根据结果对缺陷部位产生的原因进行分析并给出优化方案。优化后的模拟结果表明:支座铸件本身的缺陷基本消除且... 以支座为研究对象,分析支座的工艺性和结构特点,制定初始铸造工艺方案,运用数值模拟软件ProCAST对初始铸造工艺方案进行模拟,根据结果对缺陷部位产生的原因进行分析并给出优化方案。优化后的模拟结果表明:支座铸件本身的缺陷基本消除且铸件表面无缩孔、缩松、夹砂等缺陷,满足铸件的技术要求。最后指出:运用ProCAST软件对支座的铸造工艺进行模拟,可以有效地分析和验证浇冒口系统设置的合理性以及方案的可行性,并改进优化铸造工艺方案不足之处,为工艺实践提供理论依据。 展开更多
关键词 球墨铸铁 支座 铸造工艺 数值模拟
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基于ProCAST的支架铸件熔模铸造工艺优化 被引量:2
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作者 张晓光 韦洲 李莹 《热加工工艺》 CSCD 北大核心 2018年第21期100-102,共3页
分析了球墨铸铁支架铸件原工艺产生缩孔、缩松铸造缺陷的原因。通过ProCAST软件对工艺进行了分析和优化,对铸件浇注位置、排气位置等工艺参数进行了改进。结果表明:优化方案的铸件缩孔率总和为0.20%,缩松缩孔主要集中在直浇道和内浇道,... 分析了球墨铸铁支架铸件原工艺产生缩孔、缩松铸造缺陷的原因。通过ProCAST软件对工艺进行了分析和优化,对铸件浇注位置、排气位置等工艺参数进行了改进。结果表明:优化方案的铸件缩孔率总和为0.20%,缩松缩孔主要集中在直浇道和内浇道,并且缺陷明显减少。与原始方案相比,优化方案更合理。 展开更多
关键词 PROcast软件 熔模铸造 球墨铸铁 支架 数值模拟
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工艺参数对球墨铸铁和低碳钢激光焊接的影响 被引量:1
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作者 洪妙 刘佳 +2 位作者 石岩 张培学 魏登松 《激光技术》 CSCD 北大核心 2024年第1期54-59,共6页
为了提高球墨铸铁和低碳钢焊接接头力学性能,解决容易开裂的问题,采用激光焊接的方法对球墨铸铁和低碳钢进行焊接,研究了工艺参数对其焊接接头的组织和性能影响。结果表明,随着激光功率逐渐增加或焊接速率的逐渐变缓,试验件抗拉强度呈... 为了提高球墨铸铁和低碳钢焊接接头力学性能,解决容易开裂的问题,采用激光焊接的方法对球墨铸铁和低碳钢进行焊接,研究了工艺参数对其焊接接头的组织和性能影响。结果表明,随着激光功率逐渐增加或焊接速率的逐渐变缓,试验件抗拉强度呈现出先增大后减小的变化趋势;当焊接功率为4250 W和焊接速率为2.4 m/min时,试样件焊接接头的强度处于极值400 MPa;在球墨铸铁侧热影响区内形成3种壳体结构(双壳结构、单壳结构和无核结构);焊缝区组织主要由树枝晶组织、少量的马氏体和莱氏体组织构成;焊缝区存在微裂纹,通过添加镍基材料可获得无裂纹焊缝,并提升抗拉强度约40 MPa,达到母材的95%。该研究对后续球墨铸铁与低碳钢高功率激光焊接工艺优化是有帮助的。 展开更多
关键词 激光技术 激光焊接 球墨铸铁 低碳钢
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球墨铸铁表面激光熔覆层的组织及耐腐蚀性能研究
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作者 党钰钦 李冬杰 +6 位作者 刘艳梅 赵治伟 白云龙 Kim Kwang Ho 连伟锋 王子铭 王铁钢 《表面技术》 EI CAS CSCD 北大核心 2024年第17期126-134,145,共10页
目的解决用于乏燃料贮运的球墨铸铁筒体容器因内壁腐蚀导致服役寿命短的问题,提高球墨铸铁表面的硬度及耐腐蚀性能。方法利用送粉式激光熔覆技术在球墨铸铁表面制备4种不同组分的316L不锈钢、Ni625合金、410L不锈钢及NJ30合金熔覆层。... 目的解决用于乏燃料贮运的球墨铸铁筒体容器因内壁腐蚀导致服役寿命短的问题,提高球墨铸铁表面的硬度及耐腐蚀性能。方法利用送粉式激光熔覆技术在球墨铸铁表面制备4种不同组分的316L不锈钢、Ni625合金、410L不锈钢及NJ30合金熔覆层。采用金相显微镜、X射线衍射仪、扫描电子显微镜、能谱仪表征熔覆层的微观组织、物相组成、元素分布及腐蚀形貌。借助显微硬度计、电化学工作站测试熔覆层的显微硬度及耐腐蚀性能。结果4种合金熔覆层均成形质量良好,无裂纹及明显的气孔缺陷,并与基体形成了良好的冶金结合。熔覆层底部至顶部出现相似的组织形态,但晶粒尺寸存在较大的差异。316L、Ni625、410L及NJ30显微硬度显著高于基体,分别为基体的1.74、1.92、2.35及2.4倍,熔覆层内部固溶体及硬质相的生成是提高硬度的显著因素。在3.5%的NaCl溶液中,4种熔覆层的耐腐蚀性由好到差为316L、Ni625、410L、NJ30。腐蚀形貌显示,316L及Ni625熔覆层在电化学测试环境下具有良好的抗腐蚀性能。结论316L及Ni625合金熔覆层具有良好的综合性能,适用于提高大型球墨铸铁容器的表面改性。 展开更多
关键词 激光熔覆 球墨铸铁 Fe基 Ni基 耐腐蚀性能
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大型球墨铸铁蜗轮铸件的生产工艺 被引量:2
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作者 裴泽辉 吴红光 +2 位作者 曹德水 潘红 陈冬玲 《现代铸铁》 CAS 2024年第1期10-15,共6页
介绍了大型球墨铸铁蜗轮铸件的铸造工艺设计及生产过程,利用华铸CAE软件对球墨铸铁蜗轮铸件的两种工艺方案充型及凝固过程进行了数值模拟分析,经过对比,选择中心轴孔端面引入的工艺方案二进行进一步优化。为了满足力学性能要求,选用纯... 介绍了大型球墨铸铁蜗轮铸件的铸造工艺设计及生产过程,利用华铸CAE软件对球墨铸铁蜗轮铸件的两种工艺方案充型及凝固过程进行了数值模拟分析,经过对比,选择中心轴孔端面引入的工艺方案二进行进一步优化。为了满足力学性能要求,选用纯净的原材料、合理的化学成分,采用包内孕育与随流孕育相结合的处理方式。通过对生产的10件铸件进行表面质量及力学性能检测,结果显示:铸件加工后,中心轴孔、键槽、外圆齿圈位置未见缩孔、缩松、夹渣等铸造缺陷,铸件的金相组织和力学性能均符合技术要求。 展开更多
关键词 球墨铸铁 蜗轮 铸造工艺
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盐浴氮化处理对球墨铸铁摩擦学行为的影响
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作者 柴峥灏 刘志奇 +2 位作者 陈伟敬 赵立全 仉志强 《太原科技大学学报》 2024年第5期440-444,共5页
针对轴向柱塞泵中柱塞副配对材料38CrMoAl/QT500在重载工况下表面承载能力低、耐磨性能差等问题,首次将盐浴氮化处理工艺运用于柱塞泵缸体材料QT500,将三种不同型号的球墨铸铁(QT450、QT500、QT550)作为试验材料,获得盐浴氮化表面改性... 针对轴向柱塞泵中柱塞副配对材料38CrMoAl/QT500在重载工况下表面承载能力低、耐磨性能差等问题,首次将盐浴氮化处理工艺运用于柱塞泵缸体材料QT500,将三种不同型号的球墨铸铁(QT450、QT500、QT550)作为试验材料,获得盐浴氮化表面改性层。根据实际应用工况,通过显微硬度仪和CFT-I往复式摩擦磨损仪,以及SEM和EDS分析渗氮后QT450、渗氮QT500、渗氮QT550和基体QT500在液体润滑状态下与38CrMoAl球体对磨的摩擦学行为,得到显微硬度、摩擦因数、磨损量、磨损形貌和磨损表面化学成分。结果表明在摩擦过程中,盐浴氮化处理后的球墨铸铁耐磨性能得到显著提升,达到减少磨损、提供连续且稳定的润滑效果,磨损机理主要是氧化磨损和疲劳磨损。 展开更多
关键词 球墨铸铁 盐浴氮化 耐磨性能 硬度 磨损机理
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Microstructure and properties of LZQT600-3 HCCDIBs for plunger pump cylinder
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作者 Chun-jie Xu Yuan-ying Jin +8 位作者 Dong Ma Zhen Zhao Jia-wei Qi Shang Sui Xiang-quan Wu Can Guo Zhong-ming Zhang Yong-hui Liu Dan Shechtman 《China Foundry》 SCIE EI CAS CSCD 2024年第2期197-204,共8页
It is important to improve the comprehensive performance of the ductile iron bars(DIBs)for the cylinder block of the extra high pressure hydraulic plunger pump and accelerate the industrial application.In this work,th... It is important to improve the comprehensive performance of the ductile iron bars(DIBs)for the cylinder block of the extra high pressure hydraulic plunger pump and accelerate the industrial application.In this work,the LZQT600-3 DIBs with the diameter of 145 mm were prepared by the horizontal continuous casting(HCC)process,that is,LZQT600-3 HCCDIBs.The microstructure and room temperature tensile properties of different sections[left-edge(surface layer),left-1/2R(left half of the radius),and the center of the HCCDIBs]were studied.The results show that the spheroidization of LZQT600-3 HCCDIBs matrix from the left-edge,left-1/2R to the center is at nodulizing grade II and above.As the cooling rate gradually decreases from surface to the center of the HCCIBs,the number of spheroidized graphite is gradually reduced,the size is gradually increased,the shape factor is decreased,and the pearlite content and lamellate spacing are increased.Along the horizontal direction of the section,the hardness of the material is distributed symmetrically around the center of the HCCDIBs.In the vertical direction,the hardness distribution in the center of the HCCDIBs is asymmetrical due to the gravity during the solidification process.Therefore,the microstructure in the lower part of the section solidifies relatively quickly.The left-edge has the best tensile mechanical properties,and the ultimate tensile strength,yield tensile strength and elongation are 597.3 MPa,418.5 MPa and 9.6%,respectively.The tensile fracture belongs to the ductile-brittle hybrid fracture.The comprehensive performances of LZQT600-3 HCCDIBs meet the actual application requirements of ultra-high pressure hydraulic plunger pump cylinder. 展开更多
关键词 horizontal continuous casting(HCC) nodular cast iron ductile iron bars microstructure mechanical properties
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DISA线某整体式差速器壳体铸造工艺的开发
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作者 龚华林 刘金林 《现代铸铁》 CAS 2024年第2期5-10,共6页
介绍了某整体式差速器壳体铸件的结构及技术要求,详细阐述了DISA线生产差速器壳体的铸造工艺开发过程,在开发前期,使用MAGMA数值模拟软件对设计的铸造工艺进行模拟分析,研究了3种冒口的工艺方案,后续选择模拟结果最优、工艺出品率最高... 介绍了某整体式差速器壳体铸件的结构及技术要求,详细阐述了DISA线生产差速器壳体的铸造工艺开发过程,在开发前期,使用MAGMA数值模拟软件对设计的铸造工艺进行模拟分析,研究了3种冒口的工艺方案,后续选择模拟结果最优、工艺出品率最高的方案进行实际生产试制。试制结果显示:内部缺陷达到D3/1的目标,铸件外观缺陷4.8%,加工外观缺陷率为0。最后指出:(1)通过二级横浇道的浇注系统设计,对差速器壳体外观砂孔的改善非常明显;(2)通过合适的冒口设计,差速器壳体的长轴头孔不铸出,即采用长轴头位置填充工艺,后续可通过机加工将缩孔、缩松连同填充位置一起加工掉,实现差速器壳体内部缺陷达到D3/1的目标。 展开更多
关键词 球墨铸铁 差速器壳体 铸造工艺
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