CAJ | 학술논문

文章对炼油焦化富气压缩机十字销轴断裂失效的原因进行了分析。从宏观形貌分析，存在疲劳裂纹所特有的贝壳状花纹，有铜屑嵌入裂纹内部并在反复挤压过程中形成铜屑层，可明确判断该断口属于疲劳断口；从微观断口形貌分析，断口表面深层部位存在疲劳辉纹，疲劳辉纹间距约在2μm左右，根据疲劳辉纹的间距也可以看出，该螺栓断口属于高周疲劳，十字销轴断口表面附近材料成分分析的Cu元素含量偏高，断口表面含有铜屑嵌入物，而断口表面存在铜屑嵌入物会引起电偶腐蚀，产生腐蚀疲劳，进一步促进疲劳过程的发生和发展。确认十字销轴断裂主要是由于高周疲劳开裂引起的，并提出相关建议。
문장대련유초화부기압축궤십자소축단렬실효적원인진행료분석。종굉관형모분석，존재피로렬문소특유적패각상화문，유동설감입렬문내부병재반복제압과정중형성동설층，가명학판단해단구속우피로단구；종미관단구형모분석，단구표면심층부위존재피로휘문，피로휘문간거약재2μm좌우，근거피로휘문적간거야가이간출，해라전단구속우고주피로，십자소축단구표면부근재료성분분석적Cu원소함량편고，단구표면함유동설감입물，이단구표면존재동설감입물회인기전우부식，산생부식피로，진일보촉진피로과정적발생화발전。학인십자소축단렬주요시유우고주피로개렬인기적，병제출상관건의。
The causes of cracking failure of crosshead of refinery coker＇s rich gas compressor were analyzed. As macro imaging found that there were shell figures unique to fatigue cracking and copper scraps embedded in the cracks forming copper scrap layer by repeated pressing, it was concluded that the fracture is the fatigue fracture. As the micro imaging found that there were fatigue striations in the fracture with a spacing of a bout of 2um, it was concluded that the bolt fracture suffered from high - cycle fatigue. In additional, the higher Cu in the surface of crosshead and copper scraps embedded in the fracture would cause galvanic corrosion and corrosion fatigue, further accelerating the development of fatigue. The high - cycle fatigue cracking is the culprit of cracking of crosshead and corresponding prevention measures are recommended.