挤压坯料氧化喷涂后表面出现凹坑，找大神判断下是不是除气除渣不到位导致的夹渣、气孔缺陷？80倍金相显微镜下的图片，原坯料用手指沾粉末表面直接出现凹坑。[img=,750,560]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568957_2956491_3.jpg[/img][img=,750,625]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568958_2956491_3.jpg[/img][img=,750,562]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568959_2956491_3.jpg[/img][img=,750,562]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568960_2956491_3.jpg[/img][img=,750,562]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568961_2956491_3.jpg[/img][img=,750,562]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568962_2956491_3.jpg[/img][img=,750,562]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568963_2956491_3.jpg[/img][img=,750,562]https://ng1.17img.cn/bbsfiles/images/2015/10/201510010412_568964_2956491_3.jpg[/img]