在热模拟单向压缩条件下研究了Q235碳素钢形变强化相变产生的超细铁素体退火时的组织及取向(差)演变过程及其应变量和先共析铁素体的影响.结果表明,形变强化相变后细晶铁素体内形变储存能有限,加上渗碳体的钉扎,一般不发生明显的静态再结晶过程.当应变量足够大时,形变后在650℃下保温铁素体发生正常长大.先共析铁素体存在时,形变后在650℃退火时,形变长条铁素体发生明显的(亚)晶粒回复式长大.形变改变了未转变奥氏体的分解方式,表现为奥氏体向离异珠光体的加速转变.讨论了低碳钢形变后铁素体难以再结晶的原因.
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