铸型对中碳低合金耐磨钢硬韧性和耐磨性的影响  

Effect of Casting Mold on Hardness,Toughness and Wear Resistance of Medium-Carbon Low Alloy Wear-Resisting Steel

作　　者：王超众 平宪忠 李卫 WANG Chao-zhong;PING Xian-zhong;LI Wei(Institute of Advanced Wear and Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,Guangdong,China;National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology,Jinan University,Guangzhou 510632,Guangdong,China;Linyi Tiankuo Casting Co.,Ltd.,Linyi 276000,Shandong,China)

机构地区：[1]暨南大学先进耐磨蚀及功能材料研究院,广东广州510632 [2]暨南大学高性能金属耐磨材料技术国家地方联合工程研究中心,广东广州510632 [3]临沂天阔铸造有限公司,山东临沂276000

出　　处：《铸造》2023年第3期235-240,共6页Foundry

基　　金：广东省自然科学基金项目2022A1515010091;广东省科技计划项目2017B090903005。

摘　　要：采用SEM、XRD、冲击试验机和动载冲击磨料磨损试验机等,研究了三种不同冷却速度铸型下铸造锤头用中碳低合金耐磨钢的显微组织、硬度、冲击韧性和耐磨性。结果表明,三种试样显微组织均由回火马氏体、碳化物和残余奥氏体组成,且使用金属激冷铸型制成的钢,回火马氏体更加细小。对比石英砂铸型,使用金属激冷铸型的钢试样洛氏硬度、冲击韧性和耐磨性提升2.7%、16.1%以及14.6%。冷却速度高的铸型,有利于钢组织细化,同时提高硬度和耐磨性。The microstructure,hardness,impact toughness and wear resistance of medium carbon low alloy wearresistant steel for hammer casting at three different cooling rates were studied by means of SEM,XRD,impact testing machine and dynamic load impact abrasive wear testing machine.The results show that the microstructures of the three samples are all composed of tempered martensite,carbide and retained austenite,and the tempered martensite of the alloy made bychilled metal mold is finer.Compared with the quartz sand casting,the rockwell hardness,impact toughness and wear resistance of the specimens with chilled metal mold increased by 2.7%,16.1% and 14.6%.The casting with high cooling speed is beneficial to refine steel structure,improve hardness,toughness and hard toughness,and improve wear resistance.

关 键 词：低合金耐磨钢 铸型 显微组织 力学性能 耐磨性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]