炸药参数对高锰钢爆炸硬化性能的影响  

Influence of explosive parameter on the performance of explosion hardening of Hadifield steel

作　　者：胡晓艳[1,2] 沈兆武[2] 刘迎彬[1] 刘天生[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]中国科学技术大学近代力学系,安徽合肥230027

出　　处：《爆炸与冲击》2015年第2期255-260,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(11072222)

摘　　要：为了研究炸药参数对高锰钢爆炸硬化效果的影响,对两种不同密度的炸药进行爆速测试,并利用该炸药分别对高锰钢试样进行爆炸硬化实验,测试了从硬化表面向材料内部的硬度、抗拉强度和冲击韧性随深度的变化。测试结果表明:高锰钢试样在相同深度下,经过密度1.38g/cm3炸药3次爆炸硬化得到的硬度大于密度1.48g/cm3炸药2次爆炸硬化后的硬度,而冲击韧性小于密度1.48g/cm3炸药作用后的冲击韧性;从爆炸硬化表面向下15 mm内,经过密度1.38g/cm3炸药3次爆炸硬化得到的抗拉强度大于密度1.48g/cm3炸药2次爆炸硬化后的抗拉强度,但深度大于15mm时,经过密度1.38g/cm3炸药3次爆炸硬化得到的抗拉强度小于密度1.48g/cm3炸药2次爆炸硬化后的抗拉强度。从硬化后试件的硬度、抗拉强度以及冲击韧性这3方面考虑,使用单次爆炸冲量较小的炸药进行多次爆炸硬化效果较好。In order to study the influence of explosive parameter on the effect of explosion hardening of the Hadifield steel, detonation velocities of two different densities of explosive were tested respective- ly. The variation of internal hardness, tensile strength and impact toughness from the hardened sur- face to inside the material with depth was tested respectively. The hardness and impact toughness of the sample for triple explosion with the density of 1.38 g/cm3 are larger than those for twice explosion with the density of 1.48 g/cm3 at the same hardening depth. The tensile strength for triple explosion with the density of 1.38 g/cm3 is higher from the surface to 15 mm below the hardened surface but is lower from 15 mm down. For the hardness, tensile strength and impact hardened toughness consider- ation, the effect of explosion hardening for the smaller single impulse is better.

关 键 词：爆炸力学 硬化效果 爆炸硬化 高锰钢 炸药参数 爆炸冲量 

分 类 号：O346.4[理学—固体力学]