Please wait a minute...
材料研究学报    DOI: 10.11901/1005.3093.2024.424
  本期目录 | 过刊浏览 |
GCr15轴承钢渗碳体粒径调控与力学性能研究
刘晶1,李云杰2,秦煜3,李琳琳2
1. 东北大学轧制技术及连轧自动化国家重点实验室
2. 东北大学
3. 中国工程物理研究院机械制造工艺研究所
Research on cementite Size Control and Mechanical Properties of GCr15 Bearing Steel.
引用本文:

刘晶 李云杰 秦煜 李琳琳. GCr15轴承钢渗碳体粒径调控与力学性能研究[J]. 材料研究学报, 10.11901/1005.3093.2024.424.

全文: PDF(22658 KB)  
摘要: 本研究用淬火和高温回火对GCr15轴承钢进行了球化处理,随后对球化组织进行了淬火和低温回火处理,探索了组织演变特别是碳化物的粗化机理及其与硬度的关联。结果表明,930 ℃奥氏体化加水/油淬后进行700℃高温回火球化处理,随回火时间(6h、12h、24h、48h)的延长,球化渗碳体不断粗大、尺寸均匀,粗化遵循Ostwald熟化理论;经二次淬火(840 ℃保温10min)和低温回火(160 ℃保温2h)后,渗碳体部分溶解,含量降低,而在两相区奥氏体化的过程中,碳化物颗粒在发生溶解的同时,还会因Ostwald熟化而发生粗化,促使渗碳体平均粒径略有升高。借助于简单高效的淬火和高温回火工艺实现了渗碳体的球化和粒径调控。球化过程中较长的高温回火时间使大的渗碳体变多,在二次淬火和低温回火过程中保留的更多,导致渗碳体平均粒径较大,同时奥氏体含碳量低更易于转变为马氏体。碳化物尺寸变大,间距变大,导致硬化效果变弱,而马氏体变多则能够缓解硬度下降。球化组织及二次淬火和回火组织状态的显微硬度基本满足GCr15轴承钢的硬度要求。该部分系统研究结果能为GCr15轴承钢的组织和性能优化和工艺设计提供实验依据和理论指导。
关键词 金属材料GCr15轴承钢渗碳体球化处理淬火回火    
Abstract:By spheroiding the GCr15 bearing steel with quenching, high-temperature tempering, secondary quenching and low-temperature tempering, the associated evolution mechanism of the microstructure, especially the coarsening of carbides, and its correlation with ?hardness were investigated here. The results show that after austenitization at 930 °C followed by water/oil quenching and subsequent high-temperature tempering at 700 °C for spheroidization, the cementite continuously coarsened and its size became more uniform as the time of high-temperature tempering time (6, 12, 24, 48 h) increased. The coarsening of spheroidal cementite followed the Ostwald ripening theory. After the secondary quenching (holding at 840 °C for 10 min) and low-temperature tempering (holding at 160 °C for 2 h), part of the cementite dissolved and its content decreased. Due to the dissolving and coarsening of cementite during the austenitization process in the two-phase region, the average size of the cementite was increased compared to the spheroidized condition. The simple and efficient quenching and high-temperature tempering processes have achieved spheroidization and size control of the cementite. Longer high-temperature tempering time during the spheroidization process resulted in more large cementite particles, which could remain with a higher chance during the secondary quenching and low-temperature tempering process. This led to a larger average size of the cementite, and at the same time, the lower carbon content in the austenite made it easier to transform into martensite. The increase of carbide size and spacing weakened the hardening effect, while the increase in martensite content could alleviate the decrease in hardness. The hardness of the spheroidized structure and of the secondary quenching and tempering structure basically met the hardness requirements of GCr15 bearing steel. These systematic research results can provide experimental basis and theoretical guidance for the design of the microstructure and properties, as well as the process design of GCr15 bearing steel.
Key wordsMetallic materials,    GCr15 bearing steel,    Cementite,    Spheroidization,    Quenching,    Tempering
收稿日期: 2024-10-15     
ZTFLH:  T  
基金资助:国家自然科学基金
[1] 韩磊磊, 王文涛, 吴赟, 陈嘉俊, 赵勇. 无氟化学溶液法制备YBCO超导焊料的高温生长工艺研究[J]. 材料研究学报, 2025, 39(6): 474-480.
[2] 姜爱龙, 谭炳治, 庞建超, 石锋, 张允继, 邹成路, 李守新, 伍启华, 李小武, 张哲峰. 蠕墨铸铁RuT300RuT450的低周疲劳性能和损伤机制[J]. 材料研究学报, 2025, 39(6): 443-454.
[3] 杨亮, 揣荣岩, 薛丹, 刘芳, 刘昆霖, 刘畅, 蔡桂喜. SUS301L不锈钢电阻点焊接头的微观组织和力学性能研究[J]. 材料研究学报, 2025, 39(6): 435-442.
[4] 王恒霖, 丁汉林, 柴锋, 罗小兵, 王子健, 项重辰. 调质热处理对不同轧制温度的含Cu低合金高强钢力学性能的影响[J]. 材料研究学报, 2025, 39(6): 401-412.
[5] 袁新雨, 史非, 刘敬肖, 张皓杰, 杨大毅, 王美玉, 任明. Er2O3 对二硅酸锂玻璃陶瓷的结构和性能的影响[J]. 材料研究学报, 2025, 39(6): 455-462.
[6] 邱玮, 李玉林, 闫瑞, 李雅文, 陈维, 甘浪, 任延杰, 陈荐. Al对镁空气电池用挤压态Mg-Al-Ca-Mn合金阳极腐蚀和放电性能的影响[J]. 材料研究学报, 2025, 39(5): 389-400.
[7] 吴玉程, 左彤, 谭晓月, 朱晓勇, 刘家琴. 第一壁自钝化W-Cr-Zr合金的氧化行为和氧化层结构[J]. 材料研究学报, 2025, 39(5): 343-352.
[8] 任学昌, 安菊, 付宁, 姚小庆, 杨镇瑜, 陈泓锦. 在模拟太阳光下溶剂热时长对MIL-88A(Fe)活化过一硫酸盐降解罗丹明B催化性能的影响[J]. 材料研究学报, 2025, 39(5): 329-342.
[9] 李海斌, 徐惠婷, 唐伟, 吕海波, 帅美荣. 热轧碳钢/不锈钢复合板结合界面电解腐蚀的毛细效应[J]. 材料研究学报, 2025, 39(5): 362-370.
[10] 胥聪敏, 孙姝雯, 朱文胜, 陈志强, 李城臣. 三元复配杀菌剂对P110钢腐蚀行为的影响[J]. 材料研究学报, 2025, 39(4): 281-288.
[11] 陈室雨, 李卫, 旷海燕, 高绍巍, 庞东方. 一种稀土Lu3+ 掺杂无铅压电陶瓷的介电、铁电和压电性能[J]. 材料研究学报, 2025, 39(4): 272-280.
[12] 符纯国, 徐世伟, 杨晓益, 李萌蘖. 焊接热源模式对5083-H111铝合金接头性能的影响[J]. 材料研究学报, 2025, 39(4): 305-313.
[13] 冉子祚, 张爽, 苏兆翼, 王阳, 邹存磊, 赵亚军, 王增睿, 姜薇薇, 董晨希, 董闯. 基于团簇式的316不锈钢成分优化及其实验验证[J]. 材料研究学报, 2025, 39(3): 207-216.
[14] 胡彭钦, 王栋, 卢玉章, 张健. 热工艺对一种镍基单晶高温合金蠕变性能的影响[J]. 材料研究学报, 2025, 39(3): 161-171.
[15] 胡明, 张新全, 李伟强, 杨晓康, 黄金湖, 雷晓飞, 邱建科, 董利民. FeCu的含量对TC10钛合金棒材力学性能的影响[J]. 材料研究学报, 2025, 39(3): 217-224.