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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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快速加热连续退火对超高强TRIP钢显微组织与力学性能的影响
DOI: 10.3724/SP.J.1037.2011.00476, PP. 176-182
Keywords: 含V,TRIP钢,快速加热,连续退火,力学性能,残余奥氏体
Abstract:
研究了快速加热连续退火工艺对V微合金化低Si含P系TRIP钢显微组织特征与力学性能的影响.结果表明,快速连续退火过程中,随着退火温度的升高,拉伸强度增加明显,然而为了保证其综合性能,并不能一味地提高其临界退火温度.加热速率80℃/s,退火温度为880℃时,残余奥氏体形态不仅仅局限于细小的块状结构,而且在贝氏体铁素体板条间能观察到大量的薄膜状残余奥氏体.细小、弥散的V(C,N))分布于铁素体或贝氏体基体中,大部分析出粒子直径在4-9nm之间,实验钢具有优异的强度与塑性配合Rm=1010MPa,RP0.2=690MPa,δ=23.6%,n=0.27,r=1.17,强塑积达到23836MPa?%.退火温度过高或过低,都会减少残余奥氏体的体积分数、改变其形貌并增大其尺寸,导致综合力学性能下降.
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