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凝固速度对高铬铸铁m_7c_3型初生相的影响

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铸造技术 2006年第6期27卷 591-593页

作者：陈建严文李浩卢长安范新会西安工业大学材料与化工学院陕西西安710032 西北工业大学应用物理系陕西西安710072

采用液态金属冷却的定向凝固设备,研究了凝固速度对3.35wt%c-27.5wt%cr高铬铸铁原位生长复合材料初生m7c3型碳化物的影响。结果表明,凝固速度较高时初生m7c3型碳化物为空心或实心的六边形,随着凝固速度的降低,出现了U形和L形m7c3型碳化... 详细信息

采用液态金属冷却的定向凝固设备,研究了凝固速度对3.35wt%c-27.5wt%cr高铬铸铁原位生长复合材料初生m7c3型碳化物的影响。结果表明,凝固速度较高时初生m7c3型碳化物为空心或实心的六边形,随着凝固速度的降低,出现了U形和L形m7c3型碳化物;实心六边形、U形和L形初生相m7c3型碳化物横截面的硬度值为HV 2500左右,而空心六边形碳化物的硬度值为HV 1550左右;初生相m7c3型碳化物在定向凝固过程中具有两种生长方向。

关键词：定向凝固凝固速度初生相 m7c3型碳化物

用菊池衍射测定m_7c_3碳化物与奥氏体间的位向关系

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金属热处理学报 2000年第2期21卷 50-56页

作者：张明星 P.m.Kelly Department of mining

用菊池衍射测定相间位向关系新技术对一种白口铸铁中m7c3型碳化物的晶体学进行了研究。结果表明 ,在这一材料中至少m7c3型碳化物属于正交晶系 ,而非一般认为的六方晶系。发现了三种m7c3型碳化物与奥氏体间的位向关系。它们是 :(151) c∥... 详细信息

用菊池衍射测定相间位向关系新技术对一种白口铸铁中m7c3型碳化物的晶体学进行了研究。结果表明 ,在这一材料中至少m7c3型碳化物属于正交晶系 ,而非一般认为的六方晶系。发现了三种m7c3型碳化物与奥氏体间的位向关系。它们是 :(151) c∥ (111) A,[10 1]c∥ [10 1]A 和(311) c∥ (111) A,[0 11]c∥ [0 11　 ]A 以及 (2 4 1) c∥ (111) A,[112 ]c∥ [10 1]A。应用最近提出的“Edge to edge”matching理论可对这一结果作出合理的解释。

关键词：菊池衍射 m7c3型碳化物位向关系奥氏体白口铁

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微合金化多元高铬铸铁磨球的研制

中国铸造装备与技术 2005年第6期40卷 23-25页

作者：许利民王秀梅孙剑波谢颖承德石油高等专科学校河北承德067000

利用地方资源开发研制并生产的微合金化高铬铸铁磨球,在实际应用中收到了优异的效果。本文重点介绍了其化学成分的选择,铸造、热处理工艺的确定,性能检测及应用结果。

关键词：球磨机磨球微合金化 m7c3型碳化物

Effect of Hardfacing consumables on Ballistic Performance of Q&T Steel Joints

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Defence Technology（防务技术） 2013年第4期9卷 249-258页

作者： m.BALAKRISHNAN V.BALASUBRAmANIAN G.mADHUSUDHAN REDDY Department of mechanical Engineering M. Kumarasamy College of Engineering (Autonomous) center for materials Joining & Research (cEmAJOR) Department of Manufacturing Engineering Annamalai University Solidification Technology Division Metal Joining Group Defence Metallurgical Research Laboratory (DMRL)

This study was carried out to evaluate the effect of hardfacing consumables on ballistic performance of armour grade quenched and tempered(Q&T)steel welded *** evaluate the effect of hardfacing consumables,joints were fabricated using 4 mm thick tungsten carbide(Wc)/chromium carbide(crc)hardfaced middle layer;above and below which austenitic stainless steel(SS)layers were deposited on both sides of the hardfaced *** metal arc welding(SmAW)process were used to deposite all(hardfaced layer and SS layers)*** fabricated joints were evaluated for its ballistic performance,and the results were compared with respect to depth of penetration(DOP)on weld metal and heat-affected zone(HAZ)*** the ballistic test results,it was observed that both the joints successfully stopped the bullet penetration at weld center *** the two joints,the joint made with crc hardfaced interlayer(cAHA)offered better ballistic resistance at weld *** is because its hardness is higher due to the presence of primary carbides of needle shape,polyhedral shape and eutectic matrix containing a mixture of gt m7c3carbides in the crc hardfaced *** scattering hardness level in the Wc interlayer,the matrix decomposition resulted lower hardness and the co-existence of d ferrite in the interface between hardfacing and SS root/SS cap could be attributed to the inferior ballistic resistance of the joint made with Wc hardfaced interlayer(WAHA joint).

关键词：弹道性能耐磨堆焊 m7c3型碳化物耗材焊接金属焊缝金属初生碳化物淬火效果