铜对低温球墨铸铁组织与力学性能的影响研究  

Effects of Copper on the Microstructure and Mechanical Properties of Low Temperature Ductile Iron

作　　者：齐鹏 许荣福[1] 马驿皓 王文浩 王广雨 裴栋梁 冯以盛 QI Peng;XU Rongfu;MA Yihao;WANG Wenhao;WANG Guangyu;PEI Dongliang;SIMON Yisheng Feng(School of Materials Science and Engineering,Shandong Jianzhu University,Ji'nan 250101,China;Shandong Taikai Precision Casting Co.,Ltd.,Tai'an 271000,China)

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101 [2]山东泰开精密铸造有限公司,山东泰安271000

出　　处：《铸造技术》2023年第5期443-448,共6页Foundry Technology

基　　金：山东省自然科学基金面上项目(ZR2020ME108);泰安市科技创新重大专项(2021ZDZX017)。

摘　　要：目前对球墨铸铁低温冲击韧性的研究越来越受到重视,本文以低温球墨铸铁为研究对象,研究了铜元素对低温球铁(球墨铸铁)组织及力学性能的影响规律。结果表明,铜元素可以提高石墨球的圆整度,减小石墨球径,并且使石墨球的分布更加均匀。在一定范围内(铜的质量分数为0~0.5%),随着含铜量的增多,球铁的抗拉强度、硬度得到有效提高,低温冲击性能、伸长率降低;当名义含铜量为0.3%时,布氏硬度达到178 HBW,抗拉强度达到510 MPa,伸长率为18%,-40℃热处理后低温冲击功为16 J,综合性能较好。At present,increasing attention has been given to the low temperature impact toughness of ductile iron.In this paper,the effect of copper on the microstructure and mechanical properties of low temperature nodular iron was studied.The experimental results show that copper can improve the roundness of graphite spheres,reduce the diameter of graphite spheres and make the distribution of graphite spheres more uniform.In a certain range(mass fraction of copper from 0~0.5%),with increasing copper content,the tensile strength and hardness of ductile iron are effectively improved,while the low temperature impact performance and elongation are decreased.When the nominal copper content is 0.3%,the Brinell hardness is 178 HBW,the tensile strength is 510 MPa,the elongation is 18%,and the low temperature impact energy is 16 J after heat treatment at-40℃,showing a preferably the comprehensive performance.

关 键 词：铁素体球墨铸铁 铜 力学性能 低温韧性 低温球铁 

分 类 号：TG143[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]