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style="font-family:SimSun;font-size:16px;">三,层状撕裂。其主è¦ç‰¹å¾è¡¨çŽ°ä¸ºå½“ç„ŠæŽ¥æ¸©åº¦å†·å´åˆ?00℃以下时åQŒåœ¨ä¸€äº›æ¿æåŽšåº¦æ¯”è¾ƒå¤§åQŒæ‚è´¨å«é‡è¾ƒé«˜ï¼Œç‰¹åˆ«æ˜¯ç¡«å«é‡è¾ƒé«˜åQŒä¸”å…ähœ‰è¾ƒå¼ºæ²¿æ¿æè¾åˆ¶åã^行方å‘åæžçš„ä½Žåˆé‡‘高强钢åQŒå½“其在焊接˜q‡ç¨‹ä¸­å—到垂直于厚度方å‘的作用力æ—Óž¼Œä¼šäñ”生沿轧制方å‘呈阶梯状的裂¾UV€?/span><br /> <span style="font-family:SimSun;font-size:16px;">四,未熔åˆåŠæœªç„Šé€ã€‚两者äñ”生原因基本相åŒï¼Œä¸»è¦æ˜¯å·¥è‰ºå‚æ•°ã€æŽªæ–½åŠå¡å£ž®ºå¯¸ä¸å½“åQŒå¡å£åŠç„Šé“表é¢ä¸å¤Ÿæ¸…æ´æˆ–有氧化皮åŠç„Šæ¸£½{‰æ‚物,焊工技术较差等ã€?/span><br /> <span style="font-family:SimSun;font-size:16px;">五,气孔。按其äñ”生åÅžå¼å¯åˆ†äؓ两类åQŒæ—¢æžå‡ºåž‹æ°”孔和å应型气孔。æžå‡ºåž‹æ°”孔主è¦ä¸ºæ°¢æ°”孔和æÛ气孔åQŒå应型气孔在钢æå³éžæœ‰è‰²é‡‘属的焊接中则以CO气孔ä¸ÞZ¸»ã€‚æžå‡ºåž‹æ°”孔的主è¦ç‰¹å¾æ˜¯å¤šäØ“è¡¨é¢æ°”å­”åQŒè€Œæ°¢æ°”孔与æÛ气孔的主è¦åŒºåˆ«åœ¨äºŽæ°¢æ°”孔以å•一气孔ä¸ÞZ¸»åQŒè€ŒæÛ气孔则多为密集型气孔。焊¾~中气孔产生的主è¦åŽŸå› ä¸Žç„Šæçš„选择åQŒä¿å­˜ä¸Žä½¿ç”¨åQŒç„ŠæŽ¥å·¥è‰ºå‚æ•°çš„选择åQŒå¡å£æ¯æçš„æ¸…æ´½E‹åº¦åŠç†”æ± çš„ä¿æŠ¤½E‹åº¦½{‰æœ‰å…³ç³»ã€?/span><br /> <span 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