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国内外耐磨钢夹杂物控制水平分析
Comparison of Cleanliness Wear-resistant Steel at Home and Abroad
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- DOI:
- 作者:
- 张浩1,2,3王冬4伦明睿1,2,3付建勋1,2,3沈平1,2,3
ZHANG Hao 1 ， 2 ， 3 , WANG Dong 4 , LUN Mingrui 1 ， 2 ， 3 , FU Jianxun 1 ， 2 ， 3 , SHEN Ping 1 ， 2 ，
- 作者单位:
- 1. 上海大学材料科学与工程学院2. 上海大学先进凝固技术中心3. 上海大学省部共建高品质特殊钢冶金与制备国家重点实验室4. 鞍钢股份有限公司
1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 2. Center for Advanced Solidification Technology, Shanghai University, Shanghai 200444, China; 3. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China; 4. Angang Steel Co., Ltd., Anshan 114033, China
- 关键词:
- 耐磨钢;夹杂物;Ca处理;洁净度;
wear-resistant steel; inclusions; Ca-treatment; cleanliness
- 摘要:
- 耐磨钢中夹杂物是影响耐磨钢强度、韧性的重要因素,为了分析国内外耐磨钢中夹杂物的控制水平,对日本和国内两厂的耐磨钢进行夹杂物大小、分布、成分,以及钢基体的硬度进行分析。结果表明,国内A厂通过Ca处理后与日本耐磨钢的夹杂物尺寸接近,但数量密度较大,洁净度略低于日本耐磨钢。对钢中夹杂物成分进行检测:日本耐磨钢中的夹杂物类型主要为CaO、CaO-Al2O3、MgO-Al2O3、MgO-Al2O3-CaO和TiN、Ti(C,N)夹杂;国内A厂通过Ca处理技术,降低了钢中MnS析出量,夹杂物中CaS、CaO含量增加;未经过Ca处理的国内B厂耐磨钢中发现MnS析出,经过轧制后呈长条状。对各厂的硬度进行分析,日本耐磨钢基体平均硬度为447 HV,且钢基体组织硬度分布均匀,国内A厂和B厂略低于日本耐磨钢,硬度均匀性波动较大,组织控制水平与日本产品尚有差距。
Inclusions in wear-resistant steel are important factors that affect the strength, toughness and other properties of wear-resistant steel. To analyse the control level of inclusions in wear-resistant steel at home and abroad, the size, distribution and composition of inclusions and the steel matrix hardness of wear-resistant steel from Japan and China were analysed. The results show that the size of inclusions in factory A is similar to that of the Japanese wear-resistant steel, but the density of inclusions is higher, which leads to the cleanliness being slightly lower than that of japanese wear-resistant steel. The inclusions in Japanese steel are mainly CaO, CaO-Al2O3 , MgO-Al2O3 , MgO-Al2O3 -CaO and TiN, Ti(C,N). The precipitation of MnS in steel decreases and the contents of CaS and CaO in inclusions increase by Ca-treatment in the factory A. However, MnS is found to precipitate in the wear-resistant steel of factory B domestically. According to the
hardness analysis of each factory, the average hardness of the Japanese wear-resisting steel matrix is 447 HV, and the hardness distribution is uniform. The hardness of domestic factories A and B is slightly lower than that of Japanese wear-resistant steel, and both have uneven hardness distributions. There is still a gap between the domestic products and Japanese products in terms of microstructure control level.