超高强度钢15Cr2Ni10MoCo14回火组织的研究

利用透射电子显微镜（ＴＥＭ）系统研究了１５Ｃｒ２Ｎｉ１０ＭｏＣｏ１４的超高强度钢回火后的微观组织结构。从低温到高温回火，钢的回火马氏体组织中顺次析出Ｆｅ３Ｃ，Ｍ２Ｃ，Ｍ２３Ｃ６和Ｍ６Ｃ，并在６５０℃过时效回火时发现一种在钢的回火组织中未见报道过的正交结构相，点阵常数为ａ＝０．４４８ｎｍ，ｂ＝１．４０ｎｍ，ｃ＝１．２１ｎｍ。     

正火12Cr1MoV钢回火脆化的冷速敏感性

采用示波冲击试验和高分辨透射电子显微分析技术，研究了回火冷却方式对正火１２Ｃｒ１ＭｏＶ钢回火脆化的影响。结果表明，该钢存在两个不同的回火冷速敏感性温度区间；高于６４０℃回火，铁素体基体中沉淀析出碳化物以ＶＣ类型为主，回火脆性没有明显的冷速舔生，低于６４０℃回火，基体中沉淀析出的碳化物以Ｆｅ３Ｃ类型为主，回火脆化具有明显的冷速敏感性和可逆性。     

18Cr－2Mo铁素体不锈钢｛100｝面上相的沉淀

研究了１８Ｃｒ－２Ｍｏ钢的弱化机制，碳、氮、硫和钛等元素对｛１００｝面上沉淀的第二相的类型、形貌和分布特征的影响。这些元素的含量均较高时，析出大量大尺寸厚片状Ｔｉ＿２ＣＳ和Ｍ（Ｃ，Ｎ）；含量较适中时，Ｔｉ＿２ＣＳ减少，θ－Ｆｅ＿３Ｃ和Ｍ＿（２３）Ｃ＿６细片弥散分布；钛含量较低，碳、氮含量较高时，主要沉淀相是厚片状Ｍ＿（２３）Ｃ＿６，加热后冷却时析出薄片ε－Ｆｅ＿３Ｃ、Ｍ＿（２３）Ｃ＿６和Ｍ（Ｃ，Ｎ），发现这些相均可能含硫。     

超低碳Cr26—Ni28—Mo5—Cu3—Nb0.35铸造不锈钢的组织和耐蚀性能

用金相、透射电子显微镜、电子探针与扫描电镜分析研究得出超低碳Ｃｒ２６－Ｎｉ２８－Ｍｏ５－Ｃｕ３－Ｎｂ０．３５不锈钢铸态组织中含有σ相，经８５０￣１１２０℃热处理均可形成σ相，包括（Ｆｅ－Ｃｒ）σ相，（Ｆｅ－Ｍｏ）σ相和（Ｃｒ－Ｎｉ－Ｓｉ）σ相，８５０℃左右有Ｍ６Ｃ型碳化物和ＮｂＣ析出。该钢经１１５０℃２ｈ水冷固溶处理后，具有优良的耐腐蚀性能。     

超低碳Cr26－Ni28－Mo5－Cu3－Nb0．35铸造不锈钢的组织和耐蚀性能

用金相、透射电子显微镜、电子探针与扫描电镜分析研究得出，超低碳Ｃｒ２６－Ｎｉ２８－Ｍｏ５－Ｃｕ３－Ｎｂ０．３５不锈钢铸态组织中含有σ相，经８５０～１１２０℃热处理均可形成σ相，包括（Ｆｅ－Ｃｒ）σ相，（Ｆｅ－Ｍｏ）σ相和（Ｃｒ－Ｎｉ－Ｓｉ）σ相；８５０℃左右有Ｍ６Ｃ型碳化物和ＮｂＣ析出。该钢经１１５０℃２ｈ水冷固溶处理后，具有优良的耐腐蚀性能。     

18Cr—2Mo铁素体不锈钢｛100｝面上相的沉淀

研究了１８Ｃｒ－２Ｍｏ钢的弱化机制，碳、氮、硫和钛等元素对｛１００｝面上沉淀的第二相的类型、形貌和分布特征的影响。这些元素的含量均较高时，析出大量大尺寸厚片状Ｔｉ２ＣＳ和Ｍ（Ｃ，Ｎ）；含量较适中时，Ｔｉ２ＣＳ减少，θ－Ｆｅ３Ｃ和Ｍ２３Ｃ６细片弥散分布；钛含量较低，碳、氮含量较高时，主要沉淀相是厚片状Ｍ２３Ｃ６，加热后冷却时析出薄片状ε－Ｆｅ３Ｃ、Ｍ２３Ｃ６和Ｍ（Ｃ，Ｎ），发现这些相均可能含硫。     

合金元素钼对渗碳过程中碳化物形态的影响

通过萃取复型观察和对衍射花样的标定，研究了深层渗碳过程中析出碳化物的形态和分布，实验结果表明：渗碳过程中析出的形态较好的碳化物，象点状、球状和椭球状碳化物均为钼的碳化物；而形态较差的针状、网状则为（Ｃｒ、Ｆｅ）７Ｃ３和（Ｆｅ，Ｍ）３Ｃ。并对其形成机理进行了初步探讨     

PREP法FGH95粉末中亚稳碳化物的稳定化处理

实验结果表明，对ＰＲＥＰ法ＦＧＨ９５合金粉末进行预热处理。可以使亚稳碳化物（ＭＣ’）向稳定型的ＭＣ、Ｍ２３Ｃ６、Ｍ６Ｃ型碳化物转变，明显改变碳化物的分布状态，有效地抑制ＰＰＢ的形成。     

锰和炼钢工业历史的发展

锰和炼钢工业历史的发展（上接１９９５年第６期）６锰对钢的特性的影响锰原子半径，与铁原子半径相接近，相反地其熔点较铁熔点（１５３６℃）要低，约为１２４４℃，它与碳能生成５种不同形式的碳化物；主要碳化物Ｍｎ３Ｃ与Ｆｅ３Ｃ能生成一系列连续的固熔体，由于这个...     

三价铁离子介质中硫化银的浸出

用转盘技术研究了合成Ａｇ２Ｓ在ＦｅＣｌ３－ＨＣｌ和Ｆｅ２（ＳＯ４）３－Ｈ２ＳＯ４介质中的浸出。在ＦｅＣｌ３－ＨＣｌ介质中，温度为４０－９５℃的范围内，Ａｇ２Ｓ较快地溶解，且随之主要形成元素硫。溶解动力学始终服从抛物线速率定律。速率与转盘速度无关，也与ＦｅＣｌ２浓度（当＞０．０３ｍｏ．／Ｌ时）无关。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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