摘要
对H13模具钢在锻造变形后正火工艺的不同控冷方式(风冷、雾冷及水冷)进行工业级对比试验,研究了不同冷却方式对H13钢的组织及冲击韧性的影响。结果表明,大规格试验钢在锻造变形后增加正火工艺后,风冷及雾冷不仅无法改善材料心部区域的碳化物均匀性及细化晶粒,并具有相反的副作用,只有通过水冷工艺可以达到消除网状碳化物及细化晶粒的目的。随着冷却强度的增加,材料心部的冲击韧性显著提高。
The industrial comparative tests of different controlled cooling modes(air cooling,fog cooling and water cooling)of normalizing process of H13 die steel after forging and deformation were carried out.The effects of different cooling methods on the microstructure and impact toughness of H13 steel were studied.The results show that,air cooling and fog cooling can not only improve the carbide uniformity and grain refinement in the core region of the material,but also have the opposite side effects after adding normalizing process after forging deformation.Only by water cooling process,the purpose of eliminating reticulated carbides and refining grains can be achieved.With the increase of cooling strength,the impact toughness of the core of the material increases significantly.
作者
吕士刚
于彬
温泽华
翟亚辉
LYU Shigang;YU Bin;WEN Zehua;ZHAI Yahui(Xingtai Iron and Steel Co.,Ltd.,Xingtai 054027,China)
出处
《热加工工艺》
北大核心
2021年第8期149-152,共4页
Hot Working Technology
关键词
H13钢
正火
水冷
晶粒度
冲击韧性
H13 steel
normalizing
water-cooling
grain size
impact toughness
