局部淬火金属柱壳破碎性的研究  

Fragmentation of Metal Cylindrical Shell Treated by Local Quenching

作　　者：沈正祥 袁书强 陈炯 刘峰涛 周春华 王芳 杨辉 

机构地区：[1]北方材料科学与工程研究院宁波所,浙江宁波315103

出　　处：《高压物理学报》2015年第4期293-298,共6页Chinese Journal of High Pressure Physics

基　　金：宁波市重大科技攻关项目(2009B10011)

摘　　要：采用局部淬火技术对40Cr钢柱壳进行预制处理,考察了淬硬区和基体的组织特征,并对柱壳的破碎性能进行了研究。结果表明:预制后淬硬区组织主要为针状和板条状马氏体,晶粒细化,并且脆性变大。基于此性能差异,柱壳在内部载荷作用下按设计方式破碎,破片质量分布均匀,穿透性符合要求。研究结果可为弹体设计提供一定的参考。The fragmentation and penetration of the 40Cr steel cylindrical shells preformed by local quenching technology were studied experimentally. Through scanning electron microscopy （SEM） analysis,it is found that the microstructure of hardened layer in the cylindrical shell is predominantly needle and lath type martensite,and it is more refined and brittle than bulk material. Based on the per- formance difference, the steel cylindrical shell fractures along the designed path during the expansion process. The mass distribution of the preformed fragments is relatively uniform and the penetration also meets the requirement, which can provide reference for design of ammunition.

关 键 词：柱壳 预制破片 淬火 破碎 穿透 

分 类 号：O346[理学—固体力学] TJ410.3[理学—力学]