奥氏体铬锰氮不锈钢在气蚀过程中的组织变化

用Ｘ射线衍射分析及透射电镜方法了一种含亚稳奥氏体的铬锰氮不锈钢在气蚀稆的组织变化特性。结果表明，ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢气蚀前主要由α’马氏体，亚工体和少量ε马氏体组成；     

回火温度对ZG0Cr13Mn8N钢显微组织的影响

研究了铬以相（马氏体－奥氏体）ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢在４００～７００℃温度区间内回火后的显策组织。结果表明,ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢在５８０℃回火时奥氏体量增多;淬火和逆变奥氏体在低于５８０℃回火时都十分稳定,而高于５８０℃回火时则不稳定;随着回火温度的升高,马氏体板条特征愈加不明显,且在板条马氏体和奥氏体内均有Ｍ７Ｃ３型碳化物析出、聚集和长大。     

新型铬锰氮不锈钢的抗气蚀性能

在磁致伸缩仪和转盘气蚀仪上测试了一类新型的铬锰不锈钢的抗气蚀性能，并Ｍｏｓｓｂａｕｅｒ谱分析了气蚀前后试样表层显微组织的变化。结果表明，铬锰氮双相（Ａ－Ｍ）不锈钢具有比目前水轮机轮及叶常用的ＺＧ０Ｃｒ１３Ｎｉ４－６Ｍｏ和ＺＧ０Ｃｒ１６Ｎｉ５Ｍｏ钢更高的抗气蚀性能，介稳奥氏体及其在气蚀过程中的组织变化是该类铬锰氮不锈钢具有的抗气蚀性能的重要原因。     

反击式破碎机锤头新材质研制

研制出ＺＧＣｒＭｎＣｕ反击式破碎机锤头，经装机试验，其使用寿命为现役锤头（Ｍｎ１３）的５倍，硬度值ＨＲＣ达５３，冲击韧性ａｋ值达２４Ｊ／ｃｍ＾２。     

18Mn－18Cr－0．5N奥氏体钢热变形行为

用热扭转试验及定量金相法研究了１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢热变形条件下的力学行为和动态组织变化。获得了１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢的形变激活能及峰值应力（σ＿ｐ），峰值应变（ε＿ｐ）和动态再结晶晶粒尺寸（ｄ）与Ｚｅｎｅｔ－Ｈｏｌｌｏｍｏｎ参数Ｚ之间的关系式。研究了变形温度和应变速率对１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢热加工延性的影响。     

18Mn—18Cr—0.5N奥氏体钢热变形行为

用热扭转试验及定量金相法研究了１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢热变形条件下的力学行为和动态组织变化。获得了１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢的形变激活能及峰值应力，峰值应变和动态再结晶晶粒尺寸与Ｚｅｎｅｒ－Ｈｏｌｌｏｍｏｎ参数Ｚ之间的关系式。研究了变形温度和应变速率对１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢热加工延性的影响。     

双相耐热ZG4Cr27Ni10SiMn钢的高温性能

本介绍了双相耐热ＺＧ４Ｃｒ２７Ｎｉ１０ＳｉＭｎ钢的高温力学性能和抗氧化性能及其铸态组织。分析指出：拉伸强度与温度的关系为σｂ＝１１．０１５４ｅ＾０．００５６７５（１５６４－Ｔ）；屈服强度与温度的关系为σ０．２＝９．２３５ｅ＾０．００５（１５６４－Ｔ）；断面收缩率与温度的关系为ψ＝０．１１５９Ｔ－７７．５５；冲击韧性与温度的关系为αｋ＝１．０２９·１０＾－４ｅ＾０．００９８５３Ｔ＋４５．５；１１０     

18Mn-18Cr-0.5N 钢氮化物等温析出动力学研究

用金相法并结合Ｘ射线衍射（ＸＲＤ）分析研究了１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢在８００￣９５０℃范围内氮化物由奥氏体中等温析出的过程，获得了相应的氮化物等温析出动力学曲线。结果表明，对于１８Ｍｎ－１８Ｃｒ－０．５Ｎ钢，在９５０℃以上无氮化物析出，Ｃｒ２Ｎ等温析出的鼻尖温度约为８６０℃，其不析出的临界冷却速度约为０．７５℃／ｓ，Ｃｒ２Ｎ析出量（ｘｖ／％）与奥氏体点阵常数（ａγ／ｎｍ）的关系为ｘｖ＝－９２     

英国两种轴承铝合金取得专利

据英国专利２２６８７５４号报道,戴多（Ｄａｉｄｏ）金属公司研制成一种即使在高温、高负载条件下,其疲劳强度也比常规轴承合金高的铝合金。该合金的成分（％）为：ｌ－１０Ｚｎ,０．回一ＳＣｕ,０．０５－３Ｍｇ,０．ｌ－ＺＭｎ,０．ｌ－ＳＰｂ,０．Ｉ－ＺＶ,０．０３－０．ＳＴｉ－Ｂ;为了改善合金的性能,也可加：＜８Ｓ,０．０５－０．ＳＳｒ,０．０５－０．ＳＮｉ或Ｃｏ或Ｃｒ。生产中可将该合金与钢背轧在一起,形或铝一钢复合轴承材料。另据英国专利２２６８１８８号报道,戴多金属公司还发明一种可热处理强化的轴承铝合…     

氮含量对Cr18Mn18N无磁不锈钢力学性能、磁导率和组织的影响

探讨了Ｃｒ１８Ｍｎ１８Ｎ无磁不锈钢中氮含量对钢的力学性能、磁导性能以及组织状态的影响，研究结果表明，Ｃｒ１８Ｍｎ１８Ｎ钢中氮含量大于０．３１％时，组织才为全奥氏体状态，该钢氮含量的最佳区间为０．４％￣０．６％。     

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。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.