共查询到19条相似文献,搜索用时 64 毫秒
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《不锈(市场与信息)》2009,(8)
天津钢管集团公司依托世界一流的研发中心,抽调技术骨干,充实科研力量,按系统成立工艺研究组,确定2009年90万吨高附加值产品的目标和50项重点科技创新项目,集中力量进行攻关。到目前,满足用户个性化需求的130r马氏体不锈钢油套管新品研制取得新突破,批量发往油田,解决了长期困扰油田的抗二氧化碳腐蚀问题。 相似文献
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3Cr13Cu3马氏体不锈钢抗菌性能 总被引:10,自引:1,他引:10
研究了ZG-25真空感应炉熔炼的3Cr13Cu3(%:0.35C-13.11Cr-2.68Cu)马氏体不锈钢的热处理、组织、机械性能和抗菌性。扫描电镜和X-射线衍射分析表明,3Cr13Cu3马氏体不锈钢经1050℃固溶处理600℃4h时效后钢的基体中弥散分布具有抗菌作用的直径小于0.3μm的ε-富铜相,该钢对金黄色葡萄球菌和大肠杆菌的抗菌率均大于99%。3Cr13Cu3马氏体不锈钢经1050℃固溶600℃4h时效后的抗拉强度σb达1050NPa,延伸率δ5为11%。 相似文献
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2Cr13马氏体不锈钢铸坯表面纵裂控制 总被引:1,自引:0,他引:1
根据马氏体不锈钢在连铸浇注过程中的凝固收缩特性,分析连铸浇注过程中易引发表面纵裂的原因,提出应对措施,从而有效避免板坯表面纵裂的产生。 相似文献
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Cr13系铸造马氏体不锈钢铌和碳的合理配比关系 总被引:1,自引:1,他引:0
铌作为常用的微合金元素,常被用于细化晶粒、改善钢的强度与韧性,而在不锈钢中关于铌与碳化物质量分数的定量关系以及铌和碳的合理配比的研究工作尚不够深入。通过对不同铌质量分数的1Cr13与3Cr13马氏体不锈钢的组织、碳化物质量分数等进行观察和测量,总结出了比较合理的C-Nb关系式以及这两种元素对碳化物质量分数的影响的定量关系,并结合文献提出了铌元素对Cr13系列马氏体碳化物沉淀的影响原理。结果表明,铌会促进碳化物的沉淀并改变碳化物的成分(碳化物中出现铌元素),并且随着铌质量分数的增加,Cr13系列马氏体不锈钢中的碳化物都出现了指数型增长。得出Cr13系列马氏体不锈钢中碳化物的质量分数与碳和铌的质量分数存在指数型关系,同时合理的C-Nb关系配比呈线性。 相似文献
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《不锈(市场与信息)》2007,(19):2-3
在宝钢研究院不锈钢所和不锈钢分公司科研人员的共同努力下,2Cr13N新型马氏体不锈钢试制成功。
经检验,这种新型马氏体不锈钢表面质量良好,力学性能合格。与传统的2Cr13(420J1)钢相比,该产品经热处理后,具有较高的硬度和更好的耐蚀性能。目前,首批产品已经用于刀具制作,受到用户的好评。[第一段] 相似文献
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分析研究扁平材厂生产的马氏体不锈2Cr13(餐具用钢)出现的技术、质量问题:表面抛不光,表面质量差,板形不好,通过理论和实战跟踪分析,改进生产工艺:改进加热工艺,采用新型轧辊轧制,改进热处理工艺.基本解决了马氏体不锈钢2Cr13的表面质量问题(表面抛不光问题). 相似文献
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Xiaoping Ma Lijun Wang Sundaresa V. Subramanian Chunming Liu 《Metallurgical and Materials Transactions A》2012,43(12):4475-4486
The effect of Nb microalloying on microstructure, mechanical properties, and pitting corrosion properties of quenched and tempered 13?pct Cr-5?pct Ni-0.02?pct C martensitic stainless steels with different Mo and N contents was investigated. The microstructure, density, and dispersion of high-angle boundaries, nanoscale precipitates, and amount of retained austenite were characterized by using electron backscattered diffraction, transmission electron microscopy, and X-ray diffraction to correlate with properties. The results show that the combined effects of lowering nitrogen content in 13?pct Cr-5?pct Ni-1~2?pct Mo-0.02?pct C steels to 0.01?wt pct, and adding 0.1?pct Nb are to decrease the amount of Cr-rich precipitates, as Nb preferentially combines with residual carbon and nitrogen to form carbonitrides, suppressing the formation of Cr2N and Cr23C6. Austenite grain refinement can be achieved by Nb microalloying through proper heat treatment. If the nitrogen content is kept high, then Cr-rich precipitates would occur irrespective of microalloying addition. The NbN would also occur at high temperature, which will act as substrate for nucleation of coarse precipitates during subsequent tempering, impairing the toughness of the steel. It was shown that the addition of Nb to low interstitial super martensitic stainless steel retards the formation of reversed austenite and results in the formation of nanoscale precipitates (5 to 15?nm), which contribute to a significant increase in strength. More importantly, the pitting corrosion resistance was found to increase with Nb addition. This is attributed to suppression of Cr-rich precipitates, which can cause local depletion of Cr in the matrix and the initiation of pitting corrosion. 相似文献
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Effect of Heat Treatment on Microstructure and Property of Cr13 Super Martensitic Stainless Steel 总被引:2,自引:0,他引:2
The microstructures and mechanical properties of Cr13 super martensitic stainless steel after different heat treatments were studied. The results show that the structures of the steel after quenching are of lath martensite mixed with a small amount of retained austenite. With the raising quenching temperature, the original austenite grain size increases and the lath martensite gradually becomes thicker. The structures of the tempered steel are mixtures of tempered martensite and reversed austenite dispersed in the martensite matrix. The amount of reversed austenite is from 754% to 2249%. After different heat treatments, the tensile strength, the elongation and the HRC hardness of the steel are in the range of 813-1070 MPa, 101%-212% and 2133-3237, respectively. The steel displays the best comprehensive mechanical properties after the sample is quenched at 1050 ℃ followed by tempering at 650 ℃. 相似文献
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不锈钢的市场现状及发展趋势 总被引:2,自引:0,他引:2
介绍了世界不锈钢的市场现状,以及我国不锈钢的生产及消费情况;说明了我国不锈钢生产及市场前景看好,以及铁素体不锈钢是未来不锈钢的重要发展趋势。 相似文献
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中国不锈钢的现状和发展 总被引:5,自引:2,他引:3
1我国不锈钢生产现状及存在的主要问题1.1生产现状我国从50年代初开始生产不锈钢,起步较早,但发展缓慢,近年来不锈钢材年产量一直在24万t上下徘徊,自给率很低。工艺及装备水平仍比较落后,冶炼设备(电炉)全部小于30t,很难配备二次精炼设施,浇铸仍沿用... 相似文献