2009•Ordnance Material Science and EngineeringRequires access
Research on dynamic yield strength of steel 30CrMnSiNi2A
Yaojin Wu
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Abstract
The dynamic mechanical behavior of the different heat treated low-alloy superhigh strength steel-30CrMnSiNi2A was studied by using Split Hopkinson Bar technology,the test specimen passed through three kinds of different heat treatment systems,including normalize tempering,quenching at 860 ℃ and tempering at 600 ℃,quenching at 860 ℃ and tempering at 200 ℃.It was found that yield strength of 30CrMnSiNi2A steel showed certain strain rate sensitivity.Yield strength at various strain rates increased with strain rate rising;The test specimen had certain temper brittleness under the state of quenching at 860 ℃ and tempering at 200 ℃,the steel possessed excellent comprehensive mechanical properties under the state of quenching at 860 ℃ and tempering at 600 ℃.