NM500级高强度低合金耐磨钢的研制开发  

Research and Development of NM500 Grade High Strength Low Alloy Wear-resistant Steel

作　　者：李行 尹绍江 訾文胜 秦坤[1] 张学 郝鑫 李可斌[2] Li Hang;Yin Shaojiang;Zi Wensheng;Qin Kun;Zhang Xue;Hao Xin;Li Kebin(Tangshan Medium and Heavy Steel Plate Co.,Ltd.;Technology Center of Tangsteel)

机构地区：[1]唐山中厚板材有限公司 [2]唐钢技术中心

出　　处：《宽厚板》2024年第2期39-42,共4页Wide and Heavy Plate

摘　　要：在研制开发NM500级高强度低合金耐磨钢过程中,通过设计合理成分体系及淬火+回火工艺方案,实现塑韧性与硬度匹配良好、高强度低合金耐磨钢NM500的稳定生产。布氏硬度均在489~528HBW,显微组织观察发现厚度截面为全马氏体组织。针对典型工艺的成品钢进行冲击磨料磨损耐磨对比试验,结果显示:NM500级高强度低合金耐磨钢的相对耐磨性优于NM400和NM450级高强度低合金耐磨钢,为Q355B级高强度低合金耐磨钢的8.30倍。In the research and development process of NM500 grade high strength low alloy wear-resistant steel,stable production of high strength low alloy wear-resistant steel with good matching between plasticity-toughness and hardness is achieved by designing rational composition system and quenching+tempering process.Brinell hardness scale falls between 489HBW and 528HBW,the full martensite structure is discovered at the thickness cross-section in microstructure observation.Impact abrasive wear resistance comparison test is performed on the finish steel product of typical process,the results show that the relative wear-resistance of NM500 grade high strength wear-resistant steel is superior than that of NM400 and NM450 grade high strength low alloy wear-resistant steel,which is 8.30 times higher than that of Q355B grade high strength low alloy wear-resistant steel.

关 键 词：低合金耐磨钢 淬火+回火热处理 耐磨性 

分 类 号：TG142.72[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]