爆炸硬化ZGMn13Cu2NV钢辙叉的组织和性能  

Microstructures and Mechanical Properties of ZGMn13Cu2NV Steel Crossing after Explosion Hardening

作　　者：张福成[1] 吕博[1] 刘辉 徐安友 王天生[1] 王鑫[1] 张明[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004 [2]中铁山桥集团有限公司,秦皇岛066205

出　　处：《机械工程学报》2008年第6期131-136,共6页Journal of Mechanical Engineering

基　　金：新世纪优秀人才支持计划(NCEF-05-0260);国家自然科学基金(50671091);河北省自然科学基金(E2006001026)资助项目

摘　　要：为提高高锰钢辙叉的初期抗磨损和抗变形能力,采用自行研制的黑索金(RDX)塑性片状炸药,对ZGMn13Cu2NV钢辙叉表面进行爆炸预硬化处理。系统地研究爆炸硬化处理ZGMn13Cu2NV钢辙叉硬化层组织结构、力学性能以及实际使用寿命,从而确定ZGMn13Cu2NV钢辙叉爆炸硬化处理最佳工艺。结果表明,利用厚度为3 mm的RDX炸药爆炸2次,并且两次起爆点错位20 mm以上。可获得ZGMn13Cu2NV钢辙叉理想爆炸硬化效果。ZGMn13Cu2NV钢辙叉表面爆炸硬化的机理是形变孪晶硬化,爆炸硬化处理可使ZGMn13Cu2NV钢辙叉实际寿命提高30%以上。In order to increase the wear resistance and deformation resistance, the explosion prehardening is performed on the surface of the ZGMn13Cu2NV steel crossing with RDX explosive. The effects of explosion hardening on the microstructure and mechanical properties as well as lifetime of ZGMn13Cu2NV steel crossing are investigated. The results show that the optimum hardening layer can be acquired after two times explosion with 3 mm thickness RDX explosive, and the explosion start or end locations dislocate about 20 mm between two explosions. The explosion hardening mechanism of the surface of the ZGMn13Cu2NV steel crossing is deformation twin. The lifetime of the ZGMn13Cu2NV steel crossing is increased by more than 30% by the explosion hardening treatment.

关 键 词：奥氏体锰钢 辙叉 爆炸硬化 

分 类 号：TG142.1[一般工业技术—材料科学与工程]