加热温度对高碳低合金耐磨铸钢组织和性能的影响  

Effect of heating temperature on microstructure and properties of high-carbon low-alloy wear-resistant cast steel

作　　者：王权 孙婷婷[2] 高思远[1] 魏文强 Wang Quan;Sun Tingting;Gao Siyuan;Wei Wenqiang(Inner Mongolia Zhongtian Hongyuan Rare Earth New Materials Co.,Ltd.,Baotou Inner Mongolia 014017,China;School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古中天宏远稀土新材料股份公司,内蒙古包头014017 [2]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《金属热处理》2025年第4期237-240,共4页Heat Treatment of Metals

摘　　要：对高碳低合金耐磨铸钢进行860~940℃×2 h风冷间断控制冷却+550℃×2 h去应力回火处理,并对热处理后试验钢的组织、硬度和冲击性能进行了观察和测量。结果表明,随着加热温度的升高,试验钢硬度值呈先增加后降低的变化规律,变化范围较窄,为32.9~38.7 HRC,冲击吸收能量呈整体下降的趋势,断口形貌由韧窝+准解理向准解理转变。在860~940℃加热温度范围内,组织均为珠光体+碳化物,但随着加热温度的升高,珠光体组织的片层间距变宽,由0.123μm增加到0.169μm。High-carbon low-alloy wear-resistant cast steel was heated at 860-940℃for 2 h with intermittent controlled air cooling and then followed by stress-relieving tempering at 550℃for 2 h.The microstructure,hardness,and impact properties of the tested steel after heat treatment were observed and measured.The results show that with the increase of heating temperature,the hardness value of the tested steel shows a trend of first increasing and then decreasing,with a narrow range of 32.9-38.7 HRC.The impact absorbed energy shows an overall decreasing trend,and the fracture morphology transitions from ductile dimples and quasi cleavage to quasi cleavage.Within the heating temperature range of 860-940℃,the microstructure is composed of pearlite and carbides.However,as the heating temperature increases,the lamellar spacing of pearlite microstructure widens from 0.123μm to 0.169μm.

关 键 词：高碳低合金耐磨铸钢 加热温度 组织 性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]