Influence of deep cryogenic treatment on structure and wear resistance of materials of hydraulic breaker chisels

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Bolobov, V.I.^1 ; Binhle, Thanh^1

Saint Petersburg Mining University, 21st Line 2, Saint Petersburg

199106, Russia^1

关键词: D2 steel;    Deep cryogenic treatment;    Hardened steel;    Hydraulic breaker;    Retained austenite;    Shallow cryogenic treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/4/042016/pdf
DOI  :  10.1088/1757-899X/327/4/042016

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

It is shown that shallow cryogenic treatment at-75°C (SCT) of the materials of hydraulic breaker chisels-P20, 1080 and D2 steels leads to a decrease (44 ÷ 82%) in the amount of retained austenite and an increase (26 ÷ 99%) in the amount of carbides in the structure of hardened steel, which is accompanied by an increase in its hardness (1.4 ÷ 2.1%) and abrasive wear resistance (10 ÷ 31%) with a simultaneous decrease in impact toughness (19 ÷ 24%). Deep cryogenic treatment at-196°C (DCT) and subsequent lowerature tempering of D2 steel leads to a significant increase in its wear resistance (98%) and impact toughness (32%).