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1. (CN101906588) Preparation method for air-cooled lower bainite/martensite multi-phase wear-resistant cast steel
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Application Number: 201010228484.7 Application Date: 09.07.2010
Publication Number: 101906588 Publication Date: 08.12.2010
Grant Number: 101906588 Grant Date: 28.12.2011
Publication Kind : B
IPC:
C21D 1/26
C22C 38/38
Applicants: Tsinghua University
清华大学
Inventors: Bai Bingzhe
白秉哲
Luo Kaishuang
罗开双
Zheng Yankang
郑燕康
Agents: luo wenqun
北京清亦华知识产权代理事务所(普通合伙) 11201
Priority Data:
Title: (EN) Preparation method for air-cooled lower bainite/martensite multi-phase wear-resistant cast steel
(ZH) 一种空冷下贝氏体/马氏体复相耐磨铸钢的制备方法
Abstract:
(EN) The invention relates to a preparation method for air-cooled lower bainite/martensite multi-phase wear-resistant cast steel and belongs to the field of low-alloy wear-resistant cast steel. Mn is used as a main alloy element, a small amount of alloy elements such as Cr, B, rare earth elements (La, Ce, Nb, pr) and the like are added, and the balance is Fe. The materials are smelted by a conventional steel making technique; and after being cast and moulded, the steel is subjected to austenising, air cooling or wind cooling, heating, heat preservation and low-temperature annealing. The wear-resistant cast steel after the air cooling consists of lower bainite/martensite and a small amount of granulous bainite. The hardness of the cast steel is more than 50 (HRC), and the unnotched impact energy AK of the cast steel is more than 50 J. The wear-resistant cast steel has the advantages of a small amount of alloy elements, good strength-toughness combination and wear resistance, simple technique, low cost and capability of manufacturing various low-alloy wear-resistant cast steel parts, and particularly has unique advantage for the wear-resistant cast steel parts with complex shapes and structures and large sizes and susceptible to cracking during quenching.
(ZH)

本发明涉及一种空冷下贝氏体/马氏体复相耐磨铸钢的制备方法,属于低合金耐磨铸钢领域。采用Mn为主要合金元素,添加少量的Cr,B和稀土元素(La,Ce,Nb,Pr)等合金元素,其余为Fe。采用常规炼钢工艺冶炼,铸造成型后,经奥氏体化后空冷或者风冷后,再加热、保温,进行低温回火处理。本发明生产的耐磨铸钢,空冷后组织为下贝氏体/马氏体和少量粒状贝氏体。铸钢的硬度>50(HRC),无缺口冲击功AK>50J。该耐磨铸钢合金元素含量少,强韧性配合和耐磨性能优良,工艺简单,成本低廉,可用于制造各类低合金耐磨铸钢件,特别是对于形状结构复杂、尺寸大,淬火易开裂的耐磨铸钢零件具有独特的优势。