摘要
研究了一种高强高塑的汽车用TWIP钢。TWIP钢的锰含量为15%￣30%,抗拉强度为600￣1100MPa,断后伸长率高达95%。介绍了孪晶诱发相变的微观机理,层错能对TWIP效应的影响以及显微组织对钢的力学性能的影响。锰含量为15%￣30%时,钢的塑性得以提高的机理主要是γ→ε→α相变诱发的TRIP效应;随着锰含量增加,孪晶形成逐渐起主导作用。
ATWIP （Twinning Induced Plasticity） steel with high strength and high plasticity and used in car was investigated. Manganese content （wMn%） in the TWIP steel was 0.15%--0.30%. Its tensile strength and elongation amounted respectively to 600-1000MPa and 95%. Mechanism of the twinning induced transformation, impact of stacking fault energy on TWIP effect and impact of microstructure on mechanical properties of the steel were introduced.γ→ε→α phase transformation induced TRIP effect account for increase in plasticity of the steel when wMn is equal to 0.15%--0.30%. With the increase of wMn formation of the twin will gradully play a leading role.
出处
《热处理》
CAS
2006年第3期25-30,共6页
Heat Treatment
