表面技术2017，Vol.46Issue(2)：154-158,5.DOI:10.16490/j.cnki.issn.1001-3660.2017.02.025
40Cr钢循环离子渗氮工艺及渗层硬度研究
Study on Surface Circular Plasma Nitriding Technology and Nitrided Layer Hardness of 40Cr Steel
钟厉 1马晨阳 2韩西 1罗明宝1
作者信息
- 1. 重庆交通大学 机电与车辆工程学院,重庆 400074
- 2. 哈尔滨市东安汽车发动机制造有限公司,哈尔滨 150060
- 折叠
摘要
Abstract
The work aims to explore the process effects of circular plasma nitriding and conventional constant temperature plasma nitriding technology. Firstly, the specimen quenching and tempering was carried out. Plasma nitriding was conducted by groups. The flows of ammonia and ethanol were fixed. The two technological parameters (nitriding time and nitriding tempera-ture) and nitriding technology were changed to respectively measure the surface hardness and nitriding thickness of each speci-men after nitriding. The metallographic structure of each specimen was observed and the nitrided layer performance of each group of specimens was analyzed. The surface hardness of circular plasma nitrided 530℃ 6 h specimen was the highest. With the increase in the nitriding temperature and the prolonged nitriding time, the surface hardness of specimens was increased. However, when the temperature exceeded 530℃ and the time was over 6 h, the surface hardness of specimens would be re-duced instead. The nitrdied layer thickness of the circularly nitrided 550℃ 10 h specimens was the maximum. With the increase in nitriding temperature and nitrding time, the nitrided layer of the specimen would become thicker. However, when the time exceeded 6 h, the nitriding thickness was increased more slowly. The nitriding thicknesses at 6 h, 8 h and 10 h were of little dif-ference. At the same nitriding temperature, the nitrding thickness of specimen circularly nitrdied for 6 h was basically the same with that of the specimen subject to 10 h conventional constant temperature nitriding. Within the same nitriding time, the surface hardness of the circularly nitrided specimen at 510℃ was higher than that of the nitrided specimens at the constant temperature 550℃ , and both nitriding thicknesses were almost the same. Circular plasma nitriding technology is superior to the convention-al constant temperature plasma nitriding and the circular plasma nitrided 550℃ ×8 h specimens have the best overall perfor-mance.关键词
40Cr/循环离子渗氮/恒温离子渗氮/性能Key words
40Cr/circular plasma nitriding/constant temperature plasma nitriding/performance分类
矿业与冶金引用本文复制引用
钟厉,马晨阳,韩西,罗明宝..40Cr钢循环离子渗氮工艺及渗层硬度研究[J].表面技术,2017,46(2):154-158,5.
