稀土元素对热轧辊用钢60CrMnMo热疲劳性能的影响

本文研究了稀土元素对热轧辊用钢６０ＣｒＭｎＭｏ热疲劳性能的影响，同时对不同稀土含量的６０ＣｒＭｎＭｏ钢高温短时拉伸性能和硬度进行了比较。试验结果表明：稀土元素可明显提高６０ＣｒＭｎＭｏ钢的热疲劳寿命和塑性，抑制６０ＣｒＭｎＭｏ钢的循环软化，并得出稀土元素的合适含量为０．０５％－０．１０％。     

稀土元素对60CrMnMo热轧辊用钢拉伸性能影响及疲劳寿命的估算

研究了稀土元素对６０ＣｒＭｎＭｏ热轧辊用钢在其工作温度下拉伸性能的影响，同时对其在５００℃时的疲劳寿命进行了估算．结果表明：加入适量的稀土元素，可以明显提高６０ＣｒＭｎＭｏ钢的延伸率和疲劳寿命。     

稀土对ZG60CrMnSiMo钢冲击疲劳抗力的影响

加入适量稀土能提高ＺＧ６０ＣｒＭｎＳｉＭｏ 钢的冲击疲劳抗力,过量反而导致性能恶化。     

铬─钼─钒系热模具钢中加镍量的探讨

研究了镍对热作模具钢４Ｃｒ３Ｍｏ２ＮｉＶＮｂＢ力学性能的影响，结果表明在这种钢中加入少于１．０％的镍，能增强二次硬化效应，提高韧性，改善热疲劳抗力。当加镍量达到２．０％时，镍的强韧化作用将被削弱。对产生这种作用的原因进行了讨论，并确定了４Ｃｒ３Ｍｏ２ＮｉＶＮｂＢ钢中镍的适宜加入量为１．０％。     

4Cr5MoSiV1（H13）电渣钢热疲劳性能的试验研究

研究了４Ｃｒ５ＭｏＳｉＶ１钢２０－７００℃热疲劳裂纹的形成与扩展。结果表明，１０５０－１０６０℃淬火，５８０－５６０℃回火使４Ｃｒ５ＭｏＳｉＶ１电渣钢具有较好的热疲劳抗力。并观察到在热疲劳循环初期，其硬度下降较快，循环一定次数以后，其硬度下降平缓。     

CrMo新轴承钢的热处理工艺与性能

研究了铬轴承钢ＧＣｒ１５ＳｉＭｎ和新开发的Ｃｒ－Ｍｏ轴承钢的ＧＣｒ１５Ｍｏ和ＧＣｒ１６Ｍｏ的热处理工艺和性能。结果表明，ＧＣｒ１５Ｍｏ钢的淬透性低于ＧＣｒ１５ＳｉＭｎ多，但ＧＣｒ１６Ｍｏ钢的淬透性高于ＧＣｒ１５ＳｉＭｎ钢，ＧＣｒ１５Ｍｏ和ＧＣｒ１６Ｍｏ新钢种的机械性能和接触疲劳寿命均高于ＧＣｒ１５ＳｉＭｎ新钢种适合于制作重型机械用轴承。     

六辊轧机中间辊用钢接触疲劳性能研究

采用金相、ＴＥＭ、ＸＲＤ等手段研究了六辊轧机中间辊用５５Ｃｒ５ＮｉＭｏＶ及７０Ｃｒ３Ｍｏ钢的接触疲劳性能。结果表明：５５Ｃｒ５ＮｉＭｏＶ钢的接触疲劳性能明显高于传统的７０Ｃｒ３０Ｍｏ钢。５５Ｃｒ５ＮｉＭｏＶ钢组织中的残 奥氏体量较７０Ｃｒ３Ｍｏ钢接触疲劳过程中,残余奥氏体发生应变诱发马氏体转变,这种应变诱发转变可抑制并阻碍疲劳裂纹的产生和扩展。     

高强度钢表面裂纹（KIE）的测定

本文对薄板疲劳预制表面裂纹的方法了研究。在此基础上，测定了高强度钢３７ＳｉＭｎＣｒＮｉＭｏＶ，３０Ｃｒ３ＳｉＮｉＭｏＶＡ的表面裂纹韧性值（ＫＩＥ）。结果表明：ＫＩＥ分别为５３ＭＰａ．√ｍ、６０ＭＰａ．√ｍ，为高强度材料的薄壁结构件在工程上应用提供了重要的技术参数。     

60CrMnMo钢热疲劳裂纹形成及扩展机制的研究

本文借助高频感应加热；金相和电镜（热疲劳试样表面上限温度在７２３－８７３Ｋ，疲劳次数在１０００次内），研究了６０ＣｒＭｎＭｏ钢热疲劳裂纹的形成和扩展过，结果表明：主裂纹在挤入沟处萌生，并使用前沿产生结构疏松；裂纹扩展分为，裂纹与空孔或空孔正断结的忆速不稳定扩展和裂纹沿亚晶界蠕动切断的慢速稳定扩展的两个阶段；并提出了裂纹扩展的数学模型。     

推土机几种铲刃钢耐磨性能研究

根据国内资源及使用要求．研制了３１Ｓｉ２ＣｒＭｏＢ及４０ＳｉＭｎＴｉ钢。并对３１Ｓｉ２ＣｒＭｏＢ、４０ＳｉＭｎＴｉ及６５Ｍｎ三种材料的耐磨性能，进行了装车对比试验。结果表明，由于采用“三同步”原则，保证了耐磨性能数据的可靠性、真实性及数据的完整性；４０ＳｉＭｎＴｉ钢由于钢中存在ＴｉＣ质点，因而耐磨性很高，比６５Ｍｎ钢高２４．３％～２６．１％，但材料的冲击性、塑性差；３１Ｓｉ２ＣｒＭｏＢ钢由于韧性、塑性好，抗回火软化性能好，耐磨性能比６５Ｍｎ钢提高２６．１％，该钢适用于大功率推土机；６５Ｍｎ钢合金含量少，成本低，适用于小功率推土机。     

Journal of Rare Earths Contents List of Vol.32(2014)

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Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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Aluminium Production by Province or City in 2014

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China is Planning to Raise rare Earth Resource Tax Again

正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are     

Fabricated Copper Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in