为扩展Ti Al N和Ti CN薄膜的应用,以适应高速切削和绿色干式切削加工技术发展趋势和要求,采用工业化多弧离子镀在工业用钢H13表面制备Ti SiCN硬质薄膜,以改善H13钢的力学和摩擦学性能。借助扫描电子显微镜、X射线衍射仪、X射线光电子能...为扩展Ti Al N和Ti CN薄膜的应用,以适应高速切削和绿色干式切削加工技术发展趋势和要求,采用工业化多弧离子镀在工业用钢H13表面制备Ti SiCN硬质薄膜,以改善H13钢的力学和摩擦学性能。借助扫描电子显微镜、X射线衍射仪、X射线光电子能谱仪、维氏显微硬度计、摩擦磨损仪研究了Si和C的存在形态及其对Ti SiCN薄膜的微观形貌、微观结构、硬度和摩擦磨损性能的影响。结果表明:Ti Si CN薄膜组织致密,具有纳米晶Ti(CN)与非晶相(SiC、Si3N4和C);薄膜中C原子固溶于Ti(CN)中,随着C含量的增加,Ti(CN)固溶度增加;部分C以非晶态的形式存在,起到阻碍Ti Si CN纳米晶粒生长作用; Si以非晶SiC和Si3N4相的形式存在,并包裹Ti CN纳米晶,抑制薄膜晶粒的长大;高Si含量Ti Si CN-No.2薄膜和高C含量Ti Si CN-No.3薄膜表现出高硬度和耐磨减摩特性。展开更多
A high-precision shape detecting system of cold rolling strip is developed to meet industrial application, which mainly consists of the shape detecting roller, the collecting ring, the digital signal processing （DSP...A high-precision shape detecting system of cold rolling strip is developed to meet industrial application, which mainly consists of the shape detecting roller, the collecting ring, the digital signal processing （DSP） shape signal processing board and the shape control model. Based on the shape detecting principle, the shape detecting roller is designed with a new integral structure for improving the precision of shape detecting and avoiding scratching strip surface. Based on the DSP technology, the DSP shape signal processing circuit board is designed and embedded in the shape detecting system for the reliability and stability of shape signal processing. The shape detecting system was successfully used in Angang 1 250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting is 0.2 I and the shape deviation is controlled within 6 1 after the close loop shape control is input.展开更多
Significant quantities of slag are generated as waste material or by-product every day from steel industries. They usually contain considerable quantities of valuable metals and materials. Transforming these solid was...Significant quantities of slag are generated as waste material or by-product every day from steel industries. They usually contain considerable quantities of valuable metals and materials. Transforming these solid wastes from one form to another to be reused either by the same production unit or by different industrial installation is very much essential not only for conserving metals and mineral resources but also for protecting the environment. The sustainable development concept requires a more efficient management of waste materials and preservation of environment. The paper presents the basic characteristics of slag, analyses and it＇s modification by incorporating some essential plant nutrients and the possibility of its application as fertilizer was studied.展开更多
A new-generation TMCP(NG-TMCP) with ultra fast cooling(UFC) as core technique was suggested instead of the conventional TMCP in which some problems are to be solved.And the ultra fast cooling technology has been succe...A new-generation TMCP(NG-TMCP) with ultra fast cooling(UFC) as core technique was suggested instead of the conventional TMCP in which some problems are to be solved.And the ultra fast cooling technology has been successfully applied to the plate rolling production in Shouqin Metal Materials Co.Ltd.Industrial trials are reported for the production of X70 pipeline steels(about 70000 t) under UFC conditions.Pipeline steels with reasonably good properties have been produced on an industrial scale.UFC can improve the temperature uniformity,the mechanical properties and the plate profile of X70 pipeline steel.The performance features of the trial plates can meet the standard of X70 pipeline steel.Spot test results have shown that the qualification rate of shape control,the performance and charpy impact properties for the trial plates are 95%,97% and 98%,respectively.The impact values of X70 pipeline steel at UFC mode exceed the standard requirements of X80 pipeline steel.The productivity is enhanced because cutting quantity of head and tail of the plate is reduced.The enhancement of control accuracy of the red back temperatures is favorable for industrial production of X70 pipeline steel.The reduced production of the steel-making has been industrially achieved,since a new composition was designed by reducing the vanadium content to less than 0.045 wt.%.展开更多
文摘为扩展Ti Al N和Ti CN薄膜的应用,以适应高速切削和绿色干式切削加工技术发展趋势和要求,采用工业化多弧离子镀在工业用钢H13表面制备Ti SiCN硬质薄膜,以改善H13钢的力学和摩擦学性能。借助扫描电子显微镜、X射线衍射仪、X射线光电子能谱仪、维氏显微硬度计、摩擦磨损仪研究了Si和C的存在形态及其对Ti SiCN薄膜的微观形貌、微观结构、硬度和摩擦磨损性能的影响。结果表明:Ti Si CN薄膜组织致密,具有纳米晶Ti(CN)与非晶相(SiC、Si3N4和C);薄膜中C原子固溶于Ti(CN)中,随着C含量的增加,Ti(CN)固溶度增加;部分C以非晶态的形式存在,起到阻碍Ti Si CN纳米晶粒生长作用; Si以非晶SiC和Si3N4相的形式存在,并包裹Ti CN纳米晶,抑制薄膜晶粒的长大;高Si含量Ti Si CN-No.2薄膜和高C含量Ti Si CN-No.3薄膜表现出高硬度和耐磨减摩特性。
基金Foundation item: Project(2009AA04Z143) supported by the National High Technology Research and Development Program of ChinaProject (E2011203004) supported by Natural Science Foundation of Hebei Province, ChinaProjects(2011BAF15B03, 2011BAF15B02) supported by the National Science Plan of China
文摘A high-precision shape detecting system of cold rolling strip is developed to meet industrial application, which mainly consists of the shape detecting roller, the collecting ring, the digital signal processing （DSP） shape signal processing board and the shape control model. Based on the shape detecting principle, the shape detecting roller is designed with a new integral structure for improving the precision of shape detecting and avoiding scratching strip surface. Based on the DSP technology, the DSP shape signal processing circuit board is designed and embedded in the shape detecting system for the reliability and stability of shape signal processing. The shape detecting system was successfully used in Angang 1 250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting is 0.2 I and the shape deviation is controlled within 6 1 after the close loop shape control is input.
文摘Significant quantities of slag are generated as waste material or by-product every day from steel industries. They usually contain considerable quantities of valuable metals and materials. Transforming these solid wastes from one form to another to be reused either by the same production unit or by different industrial installation is very much essential not only for conserving metals and mineral resources but also for protecting the environment. The sustainable development concept requires a more efficient management of waste materials and preservation of environment. The paper presents the basic characteristics of slag, analyses and it＇s modification by incorporating some essential plant nutrients and the possibility of its application as fertilizer was studied.
基金supported by the National Basic Research Program of China ("973" Program) (Grant No. 2010CB630801)the National Natural Science Foundation of China (Grant No. 51104046)
文摘A new-generation TMCP(NG-TMCP) with ultra fast cooling(UFC) as core technique was suggested instead of the conventional TMCP in which some problems are to be solved.And the ultra fast cooling technology has been successfully applied to the plate rolling production in Shouqin Metal Materials Co.Ltd.Industrial trials are reported for the production of X70 pipeline steels(about 70000 t) under UFC conditions.Pipeline steels with reasonably good properties have been produced on an industrial scale.UFC can improve the temperature uniformity,the mechanical properties and the plate profile of X70 pipeline steel.The performance features of the trial plates can meet the standard of X70 pipeline steel.Spot test results have shown that the qualification rate of shape control,the performance and charpy impact properties for the trial plates are 95%,97% and 98%,respectively.The impact values of X70 pipeline steel at UFC mode exceed the standard requirements of X80 pipeline steel.The productivity is enhanced because cutting quantity of head and tail of the plate is reduced.The enhancement of control accuracy of the red back temperatures is favorable for industrial production of X70 pipeline steel.The reduced production of the steel-making has been industrially achieved,since a new composition was designed by reducing the vanadium content to less than 0.045 wt.%.
