CAJ | 학술논문

对H13钢的超塑性能进行了试验研究，得出了变形温度和应变速率对H13钢超塑性能的影响规律。结果表明：H13钢经1000℃三次循环淬火后，晶粒度可达13级；在温度为840℃，应变速率为1.6×10-4 s-1的条件下拉伸，其最大延伸率为185%，流变应力为31 MPa，m值为0.26。本研究为H13钢的超塑性成形工艺提供了最佳工艺参数。
대H13강적초소성능진행료시험연구，득출료변형온도화응변속솔대H13강초소성능적영향규률。결과표명：H13강경1000℃삼차순배쉬화후，정립도가체13급；재온도위840℃，응변속솔위1.6×10-4 s-1적조건하랍신，기최대연신솔위185%，류변응력위31 MPa，m치위0.26。본연구위H13강적초소성성형공예제공료최가공예삼수。
In this paper, the superplasticity of H13 steel is studied. The effective rules of deformation temperature and strain rate on the superplasticity of H13 steel are deduced from the experimental results. The results show that, after 3 times of repeated quenching, H13 steel can get a grain size number of 13; Under the temperature of 840℃ and strain rate of 1.6×10-4/s, H13 steel can gain a maximum elongation of 185%, flow stress of 31MPa and strain-rate sensitivity coefficient of 0.26, which provides optimum parameters for the superplastic forming process.