4种轴承钢在水基泥浆中摩擦学性能研究

doi:10.3901/JME.2018.13.153

机械工程学报 ›› 2018, Vol. 54 ›› Issue (13): 153-158.doi: 10.3901/JME.2018.13.153

4种轴承钢在水基泥浆中摩擦学性能研究

肖华平, 刘书海, 陈瑜, 王德国

中国石油大学(北京)机械与储运工程学院北京 102249

收稿日期:2017-07-29 修回日期:2017-12-12 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: 刘书海(通信作者),男,1974年出生,博士,教授,博士研究生导师。主要研究方向为石油装备摩擦学。E-mail:liu_shu_hai@163.com
作者简介:肖华平,男,1983年出生,博士,副教授,硕士研究生导师。主要研究方向为钻井工具摩擦学及表面工程。E-mail:hxiao@cup.edu.cn
基金资助:
国家自然科学基金（51575529）、中国石油大学（北京）引进人才科研基金（2462014YJRC049）和清华大学摩擦学国家重点实验室开放基金（SKLTKF15A07）资助项目。

Tribological Properties of 4 Types of Bearing Steel in Water Based Mud

XIAO Huaping, LIU Shuhai, CHEN Yu, WANG Deguo

College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249

Received:2017-07-29 Revised:2017-12-12 Online:2018-07-05 Published:2018-07-05

摘要/Abstract

摘要： 在油气井钻井过程中，大量井下工具在水基泥浆特殊环境中工作。井下工具中轴承部件工作条件苛刻，往往容易损坏，从而导致整个系统的失效。研究选取GCr15、9Cr18、G20CrNiMo、Cr4Mo4V等常用轴承钢为研究对象，制成盘销试样，在FALEX摩擦磨损试验机上模拟井下特殊工况，研究不同载荷、不同速度下试样的摩擦因数、磨斑直径及磨损形式。结果表明：水基泥浆中，当转速一定时，随载荷的增大GCr15、G20CrNiMo、Cr4Mo4V的摩擦因数变化不大，9Cr18的摩擦因数随载荷的增大而增大。当载荷一定时，GCr15、G20CrNiMo、Cr4Mo4V的摩擦因数随着转速升高而略微降低，9Cr18的摩擦因数整体上随转速的增大而增大。GCr15、G20CrNiMo和Cr4Mo4V的磨损形式主要为腐蚀磨损和磨粒磨损，但GCr15的腐蚀更严重。高速重载条件下（40 N，100 r/min），9Cr18的磨损形式由磨粒磨损转变为黏着磨损。

关键词: 摩擦学性能, 磨损, 水基泥浆, 轴承钢

Abstract: In petroleum/gas drilling processes, down hole tools work in an environment with water based mud. Bearings in such mechanical systems fail fast due to the extreme working condition. Friction and wear causes damage of bearings, leading to the failure of the whole system. Tribological properties of four types of bearing steels, including GCr15, 9Cr18, G20CrNiMo and Cr4Mo4V, are investigated. The materials are made into pins and rings to fit a Falex pin-on-ring tribometer. The variations of coefficient of friction, wear scar diameter and wear mechanisms of bearing specimens with loads and speeds are evaluated. The results show that, in water based drilling fluid, the coefficients of friction of GCr15, G20CrNiMo, Cr4Mo4V stay steady with increasing loads while they reduce with increasing rotation speed. For 9Cr18, however, a remarkable increase of coefficient of friction with load and speed is observed. The primary wear forms of G20CrNiMo and GCr15 are corrosion wear and abrasive wear. The corrosion of GCr15 is more serious. The primary wear forms of Cr4Mo4V are corrosion wear, fatigue wear and abrasive wear. When the rotational speed and load reached 40 N and 100 r/min, the wear form of 9Cr18 changes from abrasive wear to adhesive wear. Results provide helpful information to select bearing steel in water based mud and to increase the performance and service life of down hole tools.

Key words: bearing steel, tribological properties, water based mud, wear

中图分类号:

TG156
TH117

肖华平, 刘书海, 陈瑜, 王德国. 4种轴承钢在水基泥浆中摩擦学性能研究[J]. 机械工程学报, 2018, 54(13): 153-158.

XIAO Huaping, LIU Shuhai, CHEN Yu, WANG Deguo. Tribological Properties of 4 Types of Bearing Steel in Water Based Mud[J]. Journal of Mechanical Engineering, 2018, 54(13): 153-158.

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4种轴承钢在水基泥浆中摩擦学性能研究

Tribological Properties of 4 Types of Bearing Steel in Water Based Mud

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