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TA2钛合金表面激光熔覆Ni基Tribaloy700涂层 被引量:10
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作者 王维夫 孙凤久 王茂才 《中国激光》 EI CAS CSCD 北大核心 2007年第12期1710-1715,共6页
为提高钛合金表面强度,采用预置Trihaloy700(T7()0)合金粉末的方法在TA2钛合金表面进行了激光熔覆制备Ni基T700涂层的研究。研究结果表明,通过激光熔覆能够获得良好的T700合金涂层;涂层中Ti的适量存在能够促进laves相的析出与长... 为提高钛合金表面强度,采用预置Trihaloy700(T7()0)合金粉末的方法在TA2钛合金表面进行了激光熔覆制备Ni基T700涂层的研究。研究结果表明,通过激光熔覆能够获得良好的T700合金涂层;涂层中Ti的适量存在能够促进laves相的析出与长大,Ti稀释较小时涂层组织主要为胞状和胞一枝蔓状的奥氏体7Ni相,而Ti稀释较大时涂层组织为基体(TiNi+7Ni相)+Laves相;涂层与基材之间有一厚约80~100μm的过渡区。显微硬度测试结果表明,在固溶强化及细晶强化等作用下T700熔覆涂层的显微硬度较常规方法有明显提高,适量的Ti稀释能够进一步提高涂层的硬度。根据Ti稀释程度的不同,涂层的平均硬度值在7001000HV之间,约比TA2钛合会基材高4~5倍。 展开更多
关键词 激光技术 强化涂层 激光熔覆 钛合金 tribaloy 700
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Effect of Rhenium Addition on Isothermal Oxidation Behavior of Tribaloy T-800 Alloy 被引量:3
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作者 张玉朵 杨志刚 +1 位作者 张弛 兰昊 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2010年第3期370-376,共7页
The effects of 4 wt% rhenium (Re) addition on isothermal oxidation behavior of Tribaloy T-800 alloy have been studied at 800 °C and 1 000 °C in air. At 800 °C,T-800 shows nonuniform oxidation between ... The effects of 4 wt% rhenium (Re) addition on isothermal oxidation behavior of Tribaloy T-800 alloy have been studied at 800 °C and 1 000 °C in air. At 800 °C,T-800 shows nonuniform oxidation between dendritic and eutectic areas. Re addition clearly promotes the nonuniform oxidation,leading to considerably higher mass gains than that of T-800 at this temperature. At 1 000 °C exposure,the thickness of scale on T-800 increases significantly,accompanied by severe scale spallation during cooling to room temperature. On the contrary,T-800Re shows a marked decrease of oxide growth rate compared to the linear one of T-800 at 1 000 °C. The scale adhesion is also improved with Re addition at this higher temperature. Therefore,the role of Re depends on the exposure temperature. Re addition gives high oxidation rate at 800 °C,however,the excellent oxidation resistance is obtained by the addition of Re at a higher temperature of 1 000 °C. 展开更多
关键词 RHENIUM co-based alloy tribaloy T-800 high temperature OXIDATION
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精密铸造Tribaloy T-800合金轴套 被引量:1
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作者 田季林 杨晓飞 +1 位作者 张勇 高力强 《特种铸造及有色合金》 CAS 北大核心 2019年第7期754-755,共2页
采用硅溶胶精密铸造工艺,生产了一系列Tribaloy T-800合金轴套,铸件经过热处理,材料相关性能指标达到技术要求。Tribaloy T-800合金产品在熔炼浇注时需要注意加料顺序,熔炼温度,钢水降温静置过程,浇注温度,并在浇注完成后采用浇冒口覆... 采用硅溶胶精密铸造工艺,生产了一系列Tribaloy T-800合金轴套,铸件经过热处理,材料相关性能指标达到技术要求。Tribaloy T-800合金产品在熔炼浇注时需要注意加料顺序,熔炼温度,钢水降温静置过程,浇注温度,并在浇注完成后采用浇冒口覆盖保温剂,缓慢冷却来控制铸件的凝固温度,从而获得Laves相充分形成的合格铸件。 展开更多
关键词 钴基合金 tribaloy T-800合金 精密铸造
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激光工程化净成形技术制备Tribaloy T800涂层
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作者 李重阳(编译) 《金属材料研究》 2019年第4期48-54,共7页
Tribaloy系列合金(CoMoCrSi)的特点是在很宽的温度范围内具有很强的耐磨性和耐腐蚀性,这些性能是由其微观结构(包括不同比例的laves相)导致的。与其他所有商用Tribaloy合金相比,Tribaloy T-800合金中的Laves相含量最高,具有更高的硬度... Tribaloy系列合金(CoMoCrSi)的特点是在很宽的温度范围内具有很强的耐磨性和耐腐蚀性,这些性能是由其微观结构(包括不同比例的laves相)导致的。与其他所有商用Tribaloy合金相比,Tribaloy T-800合金中的Laves相含量最高,具有更高的硬度和耐磨性,另一方面,Laves相含量高使得该合金对脆性断裂具有较高的敏感性。本工作的主要目标是采用激光工程化净成形(LENS)技术在Ni基高温合金基板(RENE77)上制备出Tribaloy T-800涂层,该工艺的技术难点是T-800对脆性断裂的敏感性,以及由于快速冷却导致的显著热应力。因此,在这项工作中,提出了一些优化LENS工艺和提高涂层冶金稳定性的方法,采用容积法和局部基底预加热的方法,可形成无裂纹无缺陷的高质量涂层。 展开更多
关键词 tribaloy型合金 CoCrMoSi合金涂层 T-800合金 LAVES相 激光工程化净成形技术
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Comparative cyclic oxidation behaviour and effect of oxides on hardness of wear resistance coating alloys T-401 and T-900
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作者 Abdul Rehman Yang Liang +4 位作者 Mohammad Hassan Shirani Bidabadi Zheng Yu Chi Zhang Hao Chen Zhi-gang Yang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2019年第10期1069-1079,共11页
The investigated alloys are newly developed Tribaloy alloys with enhanced crack and oxidation resistance over the traditional Tribaloy alloys.The cyclic oxidation performance and effects of complex oxides on the hardn... The investigated alloys are newly developed Tribaloy alloys with enhanced crack and oxidation resistance over the traditional Tribaloy alloys.The cyclic oxidation performance and effects of complex oxides on the hardness of cobaltbased Tribaloy alloys T-401(hypoeutectic)and T-900(hypereutectic)were assessed.The results showed that T-900 alloy has a lower oxidation rate as compared to T-401 alloy at 800 and 1000℃,which attributed to the formation of dense continuous Cr2O3 layer with an upper thinner continuous layer of CoCr2O4 and NiCr2O4 oxides.At 1000℃,T-401 alloy exhibited poor oxidation resistance due to severe spallation after 3 cycles(45 h).After oxidation,T-900 alloy exhibits 98%and 18%lower mass gain than T-401 alloy at 1000 and 800℃,respectively.For T-900 alloy,relationship between mass gain and thickness of oxide layer revealed that mass will increase 0.162 mg/cm2 for every 1-μm increase in the oxides thickness.Internal SiO2 oxide was observed at 800 and 1000℃for both alloys.However,the extent of internal Si oxides increased with increasing oxidation temperature from 800 to 1000℃.Consequently,internal oxidation of Si led to the formation of Laves phase-depleted region near oxide/alloy interface in T-900 alloy at 1000℃.Thus,hardness of T-900 alloy decreased from 618 to 392 HV beneath the oxide/alloy interface at 1000℃,whereas hardness of T-900 and T-401 alloys after cyclic oxidation test at 800℃increased from 618 to 855 and 519 to 685 HV,respectively. 展开更多
关键词 tribaloy HYPOEUTECTIC ALLOY HYPEREUTECTIC ALLOY Cyclic oxidation Depletion NITRIDE HARDNESS
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