摘要
对热成型钢的成分设计、热成型工艺过程以及表面氧化的处理进行了论述。热成型工艺可以通过直接热成型或者间接热成型实现;热成型钢都是含硼钢,硼能抑制成型过程中铁素体形核;通过锰、铬和钼等提高淬透性防止珠光体形成;一般热成型钢中含有0.2%左右的碳。热成型钢可通过喷丸的方法消除表面氧化层或者镀层技术保护其表面不受氧化。
Martensitic steels are widely used for anti-intrusion automotive parts due to their extreme high strength, which are difficult to be formed to complex shape by conventional forming. Hot stamping process does product automotive parts with complex shape. There are two kinds of process： direct hot stamping and indirect hot stamping. The steels for hot stamping usually contain boron to suppress ferrite formation during cooling from austenite. Addition of manganese, chromium and molybdenum can inhibit pearlite transformation to improve hardenability. Carbon,a strong solid solution strengthener, are added in the conventional hot stamping steels to strengthen martensite. Its concentration is usually limited at approximate 0.2 wt% due to its effect on weldability. Oxide scale forms on the surface of uncoated steels during hot stamping, which are usually removed by chromium shot blasting. The Al-Si coating or Zn coating can effectively protect the surface against oxidization as well.
出处
《山东冶金》
CAS
2009年第5期17-19,共3页
Shandong Metallurgy
关键词
热成型钢
奥氏体
马氏体
热成型
hot press forming steel
austenite
martensite
hot press forming
作者简介
易红亮，男，1981年生，2002年毕业于哈尔滨工业大学材料工程系，2009年毕业于韩国浦项工科大学钢铁学院，博士。现为莱钢技术研发中心贝氏体钢研究所所长，发表论文20余篇，获汽车工业科技进步二等奖一项。从事贝氏体相变理论研究和贝氏体钢，TRIP钢及热成型钢等的开发。
