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研究了３０ＭｎＣｒＮｉＭｏＢ低合金钢在穿甲弹冲击下绝热剪切带（ＡＳＢ）的形成机制。指出在高速变形（冲击）条件下ＡＳＢ的形成是应变硬化、热软化和位错动态发时导致的应变软化等因素相互耦合产生的塑性失稳现象。进一步确认ＡＳＢ内具有周期性微观结构，并说明ＡＳＢ中周期性开裂与微结构的关系。
The formation mechanism of adiabatic shear band (ASB) of 30MnCrNiMoB low alloyed steel under the impact of armor-piercing projectile was studied. It is pointed out that the formation of ASB under high-speed deformation (impact) is a plastic buckling phenomenon caused by the mutual coupling of strain hardening, thermal softening and strain softening caused by dynamic dislocation. It is further confirmed that there is a periodic microstructure within the ASB and illustrates the relationship between the periodic cracking in the ASB and the microstructure.