大规格高碳钢线材性能时效原因初步研究

PRELIMINARY RESEARCH ON THE REASON OFPERFORMANCE AGING OF LARGESIZEHIGHCARBON STEEL WIRE RODS

大规格高碳钢线材轧后自然放置一段时间，其力学性能发生较大变化，尤其是线材的面缩率和伸长率提高幅度较大，通过对１３ｍｍ８２Ｂ线材进行不同时间段残余应力及气体氢含量的测定分析，初步探明了时效前后力学性能变化的原因及规律。

After some time of natural placement after rolling, the mechanical properties of largesize highcarbon steel wire rods change greatly, especially the reduction ratio of area and the extensibility increase greatly Through measuring and analyzing residual stress and gas hydrogen content of  13mm 82B wire rods at different time internals, the reason and the rule of the change of mechanical properties are preliminarily verified before and after aging