SUJ2轴承钢超长寿命疲劳行为研究

采用超声疲劳试验机研究SUJ2轴承钢的超长寿命疲劳。结果表明：对于复合氧化物和TiCN裂纹源,裂纹从夹杂物与基体界面处萌生;铁、铬合金碳化物裂纹源则为夹杂物本身开裂。颗粒状亮面（GBF）相对尺寸正比于裂纹源处夹杂物边缘的应力强度因子范围1/ΔK2inc,对于本实验的SUJ2材料,当ΔKinc〉8MPa·m1/2时GBF不再形成。通过数据拟合得到了GBF内裂纹扩展规律：area~（1/2）_（GBF）/area~（1/2）_（inc）=（m_1＋m_2N_f）~（m_0）,证实了Paris公式可以用来描述GBF内的裂纹扩展。...

Full description

Saved in:
Bibliographic Details
Published in材料工程 Vol. 44; no. 8; pp. 85 - 92
Main Author 李永德 张莉莉 张冲 贺莹莹
Format Journal Article
LanguageChinese
Published 河北工程大学装备制造学院，河北邯郸056038 2016
达力普石油专用管有限公司技术中心，河北沧州061000%河北工程大学装备制造学院,河北邯郸,056038%山东省分析测试中心,济南,250014%江苏省 沙钢 钢铁研究院,江苏张家港,215625
Subjects
GBF相对尺寸
夹杂物
裂纹扩展
超长寿命疲劳
裂纹扩展
inclusion
ultra-long life fatigue
crack propagation
超长寿命疲劳
GBF相对尺寸
夹杂物
relative GBF size
Online AccessGet full text
ISSN1001-4381
1001-4381
DOI10.11868/j.issn.1001-4381.2016.08.014

Cover

More Information
Summary:采用超声疲劳试验机研究SUJ2轴承钢的超长寿命疲劳。结果表明：对于复合氧化物和TiCN裂纹源,裂纹从夹杂物与基体界面处萌生;铁、铬合金碳化物裂纹源则为夹杂物本身开裂。颗粒状亮面（GBF）相对尺寸正比于裂纹源处夹杂物边缘的应力强度因子范围1/ΔK2inc,对于本实验的SUJ2材料,当ΔKinc〉8MPa·m1/2时GBF不再形成。通过数据拟合得到了GBF内裂纹扩展规律：area~（1/2）_（GBF）/area~（1/2）_（inc）=（m_1＋m_2N_f）~（m_0）,证实了Paris公式可以用来描述GBF内的裂纹扩展。
Bibliography:ultra-long life fatigue; inclusion; relative GBF size; crack propagation
Ultra-long life fatigue behavior of SUJ2 bearing steel was studied by ultrasonic fatigue testing machine.The results show that,for the crack origin of composite oxide and TiCN,crack initiates from the interface between inclusion and matrix,and for the iron-chromium carbide crack origin,the inclusion itself cracks.The relative GBF（granular bright facet）size is proportional to 1/ΔK_（inc）~2.GBF is no longer formed when ΔK_（inc）8MPa·m~（1/2） for SUJ2 bearing steel.The crack propagation rule in GBF is obtained by data fitting,it is verified that Paris equation which can describe the crack growth in GBF is verified.
11-1800/TB
LI Yong-de;ZHANG Li-li;ZHANG Chong;HE Ying-ying（Equipment Manufacturing College,Hebei University of Engineering,Handan 056038,Hebei,China;Technology R ＆ D Center,Dalipal Pipe Group Co.,Ltd.,Cangzhou 061000,Hebei,China;Shandong Analysis and Test Center,Jinan 250014,China;Jiangsu Iron ＆ Steel Research Institute（Shagang）,Zhangj
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2016.08.014