冷轧压下率分配对IF钢深冲性能的影响

The effect of the reduction in cold rolling IF steel sheet for drawability

冷轧压下率对IF钢的深冲性能有重要的影响。采用两次冷轧,在总压下率一定的情况下,两次冷轧压下率的分配是影响IF钢深冲性能的关键。通过冷轧实验,得出在总压下率一定时,两次冷轧比一次冷轧的塑性应变比r值要高;总压下率一定,一次冷轧压下率较小,两次冷轧压下率较大时,可使r值提高;同时,冷轧总压下率提高,也可使r值提高。

The reduction rate of cold rolling has important effect for drawability of IF steel.The assigning of reduction rate in cold rolling is key for drawability in twotime cold rolling when total reduction rate is steady.It is proved by the test that Plastic strain ratio rvalues is higher in twotime cold rolling than in onetime cold rolling at the same total reduction rate.If total reduction rate is steady,rvalues is higher when the second reduction rate of cold rolling is larger than the first.If total reduction rate increases,the rvalues increase.