摘要
本文对贝氏体钢和 35CrMnSi弹体以不同速度侵彻金属靶板的结果进行了宏观和细观对比实验研究 ,以揭示弹体的变形、质量侵蚀和微观组织的联系 ,尤其是与绝热剪切带之间的关系。研究发现 ,弹体头部均发生不同程度的镦粗变形或质量侵蚀 ,并有绝热剪切现象 ,剪切带的形貌和分布在很大程度上决定了弹体的宏观变形和破坏。贝钢的剪切转变带中较多微孔洞 ,其断口为平坦脆性断口 ;35CrMnSi的剪切带中较多微裂纹 ,断口平坦面比贝钢小 ,并有撕裂现象。剪切转变带的显微硬度均高于基体组织。两种材料的弹体经较低速度侵彻后 ,亦可观察到少量的形变带和转变带。
A comparative study investigating different penetration performances and microstructure development was presented in this paper when hollow projectiles made of 35CrMnSi and bainite steel impacted A3 steel plates. Powder gun was used to carry out normal impact tests at a velocity range of 600～800m/s. It was found that thickening, mass erosion and adiabatic shear bands exist in each projectile.Development and distribution of adiabatic shear bands determine the deformation and erosion of projectiles. There were microvoids and microcracks in ASBs of bainite steel and microcracks in those of 35CrMnSi. Microhardness of ASBs in both steel projectiles were about 30% higher than those of matrix.At the same striking velocities(800m/s),35CrMnSi and bainite steel projectiles have similar ballistic performances. 35CrMnSi is deformed or eroded less in comparison with bainite steel, due to its relatively higher strength. Bainite steel can be used as a material for projectiles.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2003年第3期419-423,共5页
Acta Armamentarii
