热处理对ZCPC-BTMCr20高铬铸铁微观组织和硬度的影响

doi:10.13251/j.issn.0254-6051.2021.09.016

金属热处理 ›› 2021, Vol. 46 ›› Issue (9): 95-103.DOI: 10.13251/j.issn.0254-6051.2021.09.016

热处理对ZCPC-BTMCr20高铬铸铁微观组织和硬度的影响

平兆福^1,2, 周毅³, 郑宝超^1,2, 涂小慧^1,2, 李卫^1,2

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.石泉县鹏祥建材有限责任公司, 陕西安康 725281

收稿日期:2021-04-21 出版日期:2021-09-25 发布日期:2021-12-09
通讯作者: 郑宝超,讲师,博士,E-mail:zhengbaochao@126.com
作者简介:平兆福(1994—),男,硕士研究生,主要研究方向为金属耐磨蚀材料,E-mail:2838570717@qq.com。
基金资助:
国家自然科学基金青年基金(51701084);暨南大学跃迁计划-青年项目(21617338);博士后基金(2019M663700)

Effect of heat treatment on microstructure and hardness of ZCPC-BTMCr20 high chromium cast iron

Ping Zhaofu^1,2, Zhou Yi³, Zheng Baochao^1,2, Tu Xiaohui^1,2, Li Wei^1,2

1. Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou Guangdong 510632, China;
2. National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology, Jinan University, Guangzhou Guangdong 510632, China;
3. Shiquan County Pengxiang Building Material Co., Ltd., Ankang Shaanxi 725281, China

Received:2021-04-21 Online:2021-09-25 Published:2021-12-09

摘要/Abstract

摘要： 某厂生产的破碎矿石用锤头,其服役寿命较低,仅20 h左右就因为磨损严重而失效。研究了不同热处理工艺对其组织硬度的影响。结果表明:锤头试样成分接近ZCPC-BTMCr20高铬铸铁,基体为较软的珠光体组织,宏观洛氏硬度仅为41.1 HRC,达不到相关标准要求。经960、985、1010 ℃加热保温,通过控制冷却速度可以得到马氏体或奥氏体基体,基体硬度提高,宏观硬度大于58 HRC。综合分析对于ZCPC-BTMCr20高铬铸铁,建议采用960 ℃空淬+450 ℃回火的热处理制度,其洛氏硬度可达60.1 HRC。

关键词: 高铬铸铁, 热处理, 微观组织, 硬度

Abstract: A hammerhead for crushing ore produced by factory had a relatively low service life, and it fails due to severe wear only in about 20 h. The influences of different heat treatment processes on hardness and microstructure of the hammerhead were studied. The results show that the composition of the hammerhead specimen is close to that of the ZCPC-BTMCr20 high chromium cast iron, the matrix is a softer pearlite structure, and the macroscopic Rockwell hardness is only 41.1 HRC, which does not meet the requirements of relevant standards. After heating and holding at 960 ℃, 985 ℃, 1010 ℃ respectively, martensite or austenite matrix can be obtained by controlling the cooling rate, and the hardness of the matrix is improved, with the macroscopic hardness greater than 58 HRC. Based on comprehensive analysis for ZCPC-BTMCr20 high chromium cast iron, it is recommended to adopt a heat treatment system of 960 ℃ air quenching+450 ℃ tempering, so the Rockwell hardness can reach 60.1 HRC.

Key words: high chromium cast iron, heat treatment, microstructure, hardness

中图分类号:

TG163

平兆福, 周毅, 郑宝超, 涂小慧, 李卫. 热处理对ZCPC-BTMCr20高铬铸铁微观组织和硬度的影响[J]. 金属热处理, 2021, 46(9): 95-103.

Ping Zhaofu, Zhou Yi, Zheng Baochao, Tu Xiaohui, Li Wei. Effect of heat treatment on microstructure and hardness of ZCPC-BTMCr20 high chromium cast iron[J]. Heat Treatment of Metals, 2021, 46(9): 95-103.

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热处理对ZCPC-BTMCr20高铬铸铁微观组织和硬度的影响

Effect of heat treatment on microstructure and hardness of ZCPC-BTMCr20 high chromium cast iron

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