采掘机械用高强度无碳化物贝氏体钢齿座的研制与应用
程巨强
（西安工业大学 材料与化工学院，陕西 西安 710021）
摘要：为了提高大功率采掘机械用齿座截齿耐磨性和使用寿命，研制了一种新型无碳化物贝氏体钢齿座材料，进行了齿座渗碳热处理实验，测试了渗碳后齿座表面硬度及其渗碳层显微硬度的变化，观察了渗碳层的显微组织。结果表明，无碳化物贝氏体钢齿座渗碳后空冷低温回火表面可以获得较高的硬度，渗碳层外层硬度在58 HRC以上，心部硬度HRC 40，心部冲击韧性aKU 92 J/cm2。渗碳后空冷低温回火齿座渗碳层最外层的组织为回火马氏体、残余奥氏体，过渡层的组织为回火马氏体、贝氏体铁素体、残余奥氏体，心部非渗碳层的组织为贝氏体铁素体和残余奥氏体组织。渗碳处理齿座的实体力学性能超过行业标准要求，应用于采掘机齿座具有良好的应用效果。
关键词：无碳化物贝氏体钢；齿座；渗碳；组织；性能
中图分类号：TD421 文献标志码：A doi：10.3969/j.issn. 1006-0316.2021.06.003
文章编号：1006-0316 (2021) 06-0014-06
Development and Application of High Strength Carbide Free Bainite Steel Pick Seat for Mining Machinery
CHENG Juqiang
( College of Materials Science and Chemical Engineering, Xi'an Technological University, Xi' an 710021, China )
Abstract：To improve the wear resistance and service life of the pick seat for high-power mining machinery, a new carbide-free bainite steel pick seat material was developed, and the carburizing heat treatment experiment of the pick seat was carried out. The surface hardness of the tooth holder and the microhardness of the carburized layer after carburizing were tested, and the microstructure of the carburized layer was observed. The results showed that high hardness can be obtained on the carburized surface of carbide-free bainitic steel gear seat after air cooling and tempering at low temperature. The hardness of the carburized layer is above 58HRC, the hardness of the core is HRC40, and the impact toughness of the core is aKU 92 J/cm2. After carburizing, the microstructure of the outermost layer of carburized layer of air-cooled low-temperature tempered gear seat is tempered martensite and retained austenite, the microstructure of transition layer is tempered martensite, bainite ferrite and retained austenite, and the microstructure of the non-carburized layer in the center is bainite ferrite and retained austenite. The solid mechanical properties of carburized pick seats exceed the requirements of industry standards, and it has a good application effect when applied to mining machine pick seats.
Key words：carbide free bainitic steel；pick seat；carburization；microstructure；property
—————————————
收稿日期：2020-01-14
作者简介：程巨强（1963－），男，工学博士，教授，主要研究方向为高强度钢铁材料及非铁合金耐磨材料，Email：chengjuqiang@163.com。
设为首页 | 加入收藏 | 免责条款
《机械》杂志版权所有 Copyright©2008-2012 Jixiezazhi.com All Rights Reserved
电话：028-85925070 传真：028-85925073 E-mail：jixie@vip.163.com
地址：四川省成都锦江工业开发区墨香路48号 邮编：610063
Powered by PageAdmin CMS