机械工程材料
機械工程材料
궤계공정재료
Materials for Mechanical Engineering
2015年
10期
106-110
,共5页
景启明%曲顺德%季亚奇%韩维新%王群娣%赵兴龙
景啟明%麯順德%季亞奇%韓維新%王群娣%趙興龍
경계명%곡순덕%계아기%한유신%왕군제%조흥룡
EA4T车轴钢%旋转弯曲疲劳%缺口%非扩展裂纹
EA4T車軸鋼%鏇轉彎麯疲勞%缺口%非擴展裂紋
EA4T차축강%선전만곡피로%결구%비확전렬문
EA4T axle steel%rotating bending fatigue%notch%non propagating crack
在国产 EA4T 车轴钢上截取光滑和缺口疲劳试样，按照 EN13261－2009标准测试了其旋转弯曲疲劳性能，并观察了断口形貌。结果表明：国产 EA4T 车轴钢的光滑和缺口疲劳强度均满足 EN13261－2009的要求，缺口试样的疲劳强度比光滑试样的低30％左右；光滑试样的裂纹萌生于试样表面，呈单源开裂，缺口试样的裂纹萌生于缺口根部，呈多源开裂；未断缺口试样的缺口根部存在非扩展性裂纹。
在國產 EA4T 車軸鋼上截取光滑和缺口疲勞試樣，按照 EN13261－2009標準測試瞭其鏇轉彎麯疲勞性能，併觀察瞭斷口形貌。結果錶明：國產 EA4T 車軸鋼的光滑和缺口疲勞彊度均滿足 EN13261－2009的要求，缺口試樣的疲勞彊度比光滑試樣的低30％左右；光滑試樣的裂紋萌生于試樣錶麵，呈單源開裂，缺口試樣的裂紋萌生于缺口根部，呈多源開裂；未斷缺口試樣的缺口根部存在非擴展性裂紋。
재국산 EA4T 차축강상절취광활화결구피로시양，안조 EN13261－2009표준측시료기선전만곡피로성능，병관찰료단구형모。결과표명：국산 EA4T 차축강적광활화결구피로강도균만족 EN13261－2009적요구，결구시양적피로강도비광활시양적저30％좌우；광활시양적렬문맹생우시양표면，정단원개렬，결구시양적렬문맹생우결구근부，정다원개렬；미단결구시양적결구근부존재비확전성렬문。
The rotating bending fatigue property of smooth and notched specimens cut from domestic EA4T axle steel was tested according to the standard of EN13261 -2009 and the fracture morphology was observed.The results show that the fatigue strength of the domestic EA4T axle steel met the requirements of EN13261 -2009, and the fatigue strength of the notched specimen was 30% less than that of the smooth specimen;the rotating bending fatigue cracks initiated from a single source on the surface of the smooth specimen,while the cracks in notched specimen were originated from several points around the notch root;non propagating cracks were also observed at the notch root of the non fractured notched specimen.
