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cobain81: ½ð±Ò+10, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2015-10-09 21:16:04
cobain81: ½ð±Ò+10, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2015-10-09 21:16:04
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GCr15SiMn¸ÖÇò ÔÚ ÈÈ´¦Àíʱ ³öÏÖ ±íÃæ°þÂ䣬ÇÒ °þÂäµÄ ±íÃæÏ ÓÐ ¿ªÁѵÄÉî¹µ£¬¶ÔÆä½øÐÐ ³É·Ö·ÖÎö¡¢Ó²¶È¼ì²â¡¢ºê¹Û¹Û²ì¡¢Î¢¹Û¼ìÑé ¼°·ÖÎö¡£½á¹û±íÃ÷£¬Ê§Ð§ÔÒò ÊǶʹò¹ý³ÌÖÐ ±íÃæÈ±ÏÝ °ü¹üÔÚ Ã«Å÷ÄÚ²¿£¬ÔÚÈÈ´¦Àí¹ý³ÌÖÐ ÓÉÓÚ Ó¦Á¦µÄ ×÷Ó㬵¼ÖÂÁË ÄÚ²¿È±ÏÝ ¸½½ü ²ÄÁÏ¿ªÁÑ ¼° ±íÃæµÄ°þÂä¡£ During thermal treatment, GCr15SiMn steel ball suffered surface scaling, under which there emerged a deep cracking ditch. The cracking ditch was then analyzed by component analysis, hardness measurement, macroscopic observation and microscopic examination. The results show that the failure cause is that the surface defects were wrapped inside of slug during forging process, and in the process of thermal treatment, material cracking and surface scaling emerged near internal defects due to the stress effect. |
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