等温淬火温度对ADI组织及性能的影响  

Effect of Isothermal Quenching Temperature on the Structure and Properties of ADI

作　　者：于根杰 孙玉福 路王珂 史志文 叶玉娟 YU Gen-jie;SUN Yu-fu;LU Wang-ke;SHI Zhi-wen;YE Yu-juan(College of Mechanical and Electrical Engineering,Zhongyuan Institute of Science and Technology,Zhengzhou 450000,Henan,China;College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450052,Henan,China)

机构地区：[1]中原科技学院机电工程学院,河南郑州450000 [2]郑州大学材料科学与工程学院,河南郑州450052

出　　处：《铸造》2025年第3期304-309,共6页Foundry

基　　金：中原科技学院校级科技培育重大项目XL2020A001,重点项目XL2020B001。

摘　　要：对ADI试样进行不同温度的等温淬火工艺,等温淬火保温时长均为80min。采用金相显微镜、扫描电子显微镜、布氏硬度计、拉伸试验机和冲击试验机等设备,研究等温淬火温度对ADI组织及性能的影响,并确定了ADI的最佳等温淬火温度。结果表明:等温淬火后的基体由残余奥氏体和针状铁素体组成。随着等温淬火温度的升高,基体中的针状铁素体晶粒尺寸逐渐增大,残余奥氏体量逐渐增多。ADI的硬度、抗拉强度和屈服强度逐渐减小,伸长率和冲击功逐渐增加。当等温淬火温度为250℃时,ADI具有较高的强度、硬度以及良好的韧性。Isothermal quenching processes are performed on ADI specimens at different isothermal temperatures for 80 min holding time.The influence of isothermal quenching temperature on the microstructure and properties of ADI was studied by using metallographic microscope,scanning electron microscope,Brinell hardness tester,tensile testing machine,impact testing machine and other equipment,and the optimal isothermal quenching temperature of ADI was determined.The results show that the matrix after isothermal quenching is composed of residual austenite and acicular ferrite.With the increase of isothermal quenching temperature,the size of acicular ferrite grains in the matrix gradually increased,and the amount of residual austenite gradually increased.The hardness,tensile strength and yield strength of ADI gradually decreased,while the elongation and impact work gradually increased.At the isothermal quenching temperature of 250℃,ADI has high strength,hardness and good toughness.

关 键 词：等温淬火温度 等温淬火球墨铸铁 显微组织 力学性能 

分 类 号：TG156.31[金属学及工艺—热处理]