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。     

热处理对马氏体不锈钢Fv520（B）力学性能的影响

研究了热处理对马氏体沉淀硬化不锈钢Ｆｖ５２０（Ｂ）：０．０５Ｃ－１４．５Ｃｒ－５．５Ｎｉ－１．８Ｃｕ－１．７Ｍｏ－０．３５Ｎｂ的组织和力学性能的影响。结果得出，经１０５０℃固溶处理＋８５０℃中间处理＋４７０℃时效时Ｆｖ５２０（Ｂ）钢的强度达到极大值，时效温度超过５２０℃时，形成逆转变奥氏体，残余奥氏体量增加，６２０℃达到最大值。     

回火时间对0．16C－10Ni－14Co－1Cr－1Mo钢和0．23C－12Ni－14Co－3Cr－1Mo钢组织与性能的影响

研究了０．１６Ｃ－１０Ｎｉ－１４Ｃｏ－１Ｃｒ－１Ｍｏ（１６ＮｉＣｏ）钢在５１０℃和０．２３℃－１２Ｎｉ－１４Ｃｏ－３Ｃｒ－１Ｍｏ（２３ＮｉＣｏ）钢在４８２℃回火的组织与性能。随回火时间的延长，强度、硬度的降低主要是由于Ｍ_２Ｃ的粗化及与基体共格性降低所致。Ｍ_２Ｃ的粗化速度２３ＮｉＣｏ钢要小于１６ＮｉＣｏ钢。     

回火温度对0．2C－14Co－12Ni－3Cr－1Mo钢组织与性能的影响

在４３０℃回火，板条间存在的渗碳体使０．２Ｃ－１４Ｃｏ－１２Ｎｉ－３Ｃｒ－１Ｍｏ钢的冲击韧性和断裂韧性出现最低值。４５０℃回火导致了硬化峰（σ＿ｂ≈２１０５ＭＰａ），主要是细小共格析出的碳化物所致。最佳的性能配合为拉森－米勒参数（ＬＭＰ）等于２８０００～２８３００时的回火温度。对应的回火温度为４８２℃。     

少量A1对WC－13％Fe／Co／Ni硬质合金性能和组织的影响

以ＷＣ－１３％Ｆｅ／Ｃｏ／Ｎｉ合金作为基体合金，添加少量Ａ１以研究其对ＷＣ－１３％Ｆｅ／Ｃｏ／Ｎｉ硬质合金的性能和组织的影响。结果发现：Ａ１可以细化合金中的ＷＣ晶粒，并在提高合金硬度的同时，使其抗弯强度提高１００～２００ＭＰａ。金相研究表明，添加Ａ１的ＷＣ－１３％Ｆｅ／Ｃｏ／Ｎｉ合金中的粘结相主要是γ相和板条马氏体，局部有α＋（Ｆ，Ｍｅ）＿３Ｃ的片层状组织存在。     

氩弧熔覆Ni35B+Co-WC层的组织、性能及强化机制

采用氩弧熔覆工艺在Ｑ２３５ 基材上熔覆Ｎｉ３５Ｂ＋ Ｃｏ－ＷＣ,获得了具有较高硬度和耐磨性的熔覆层。分析了熔覆层的显微组织、硬度和耐磨性及物相形貌和相结构等,证明熔覆层的强化机制是：①形成细小的Ｍ６Ｃ型合金化合物网架;②高度弥散的粒状Ｍ６Ｃ型合金化合物颗粒和极细小的Ｃｒ２Ｎｉ３ Ｂ及ＷＣ颗粒的弥散强化;③Ｃ、Ｃｒ及Ｂ等合金元素溶入α－Ｆｅ（Ｍｅ）和γ－Ｎｉ（Ｍｅ）中产生的固溶强化。     

25—20型铬镍奥氏体不锈钢的成分优化和组织性能研究

研究了碳，铬，铌对铬－镍奥氏体不锈钢在沸腾８ＮＨＮＯ３－０．４２ＭＦｅ＾３＋－０．８３ＭＳＯ＾２－４－１．３ＭＮａ＾＋介质中均匀腐蚀和晶间腐蚀的影响；提出了耐蚀材料００Ｃｒ２５Ｎｉ２０Ｎｂ的最佳成分，评价了敏化条件对００Ｃｒ２５Ｎｉ２０Ｎｂ冲击专访韧性，显微组织的影响。采用硝酸法（ＧＢ１２２３－７５Ｘ法）检验了敏化条件与晶间腐蚀行为的关系。结果表明，６５０℃是该钢析出Ｍ２３Ｃ６的最敏感温度，达到晶     

ABO_3型稀土复合氧化物结构特征和导电性的研究

用Ｘ－射线光电子能谱（ＸＰＳ）对钙钛矿型稀土复合氧化物ＬａＭＯ３（Ｍ＝Ｃｒ、Ｆｅ、Ｃｏ、Ｎｉ）的结构性质进行了表征，发现ＬａＭＯ３中金属离子Ｍ的ｄ电子具有程度不同的离域性，且随着Ｍ的不同，离域程度递变规律为ＬａＮｉＯ３＞ＬａＣｏＯ３＞ＬａＣｒＯ３＞ＬａＦｅＯ３，这与其导电性大小顺序相一致。     

少量Al对WC—13?／Co／Ni硬质合金性能的组织的影响

以ＷＣ－１３％Ｆｅ／Ｃｏ／Ｎｉ合金作为基体合金，添加少量Ａｌ以研究其对ＷＣ－１３％Ｆｅ／Ｃｏ／Ｎｉ硬质合金的性能和组织的影响，结果发现，Ａｌ可以细化合金中的ＷＣ晶粒，并在提高合金硬度的同时，使其抗弯强度提高１００～２００ＭＰａ，金相研究表明，添加Ａｌ的ＷＣ－１３％Ｆｅ／Ｃｏ／Ｎｉ合金中的粘结相主要是γ相和板条马氏体，局部有α＋（Ｆｅ，Ｍｅ）３Ｃ的片层状组织存在。     

粘结剂成分对WC－20（Fe／Co／Ni）硬质合金力学性能和显微组织的影响

用常规的粉末冶金工艺试制了四种成分的ＷＣ－２０（Ｆｅ／Ｃｏ／Ｎｉ）合金，优选粘结剂的成分及总碳量可使其力学性能最佳。着重研究了ＷＣ－２０（Ｆｅ／Ｃｏ／Ｎｉ）合金的力学性能和显微组织，发现：粘结相为李晶马氏体和奥氏体时，其主要力学性能不低于ＷＣ－２Ｃｏ；而粘结相全部为板条马氏体时，其主要力学性能低于ＷＣ－２Ｃｏ     

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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