这样的夹杂物符合材料要求吗？

aaron01

弹簧热处理后做疲劳强度测试，3个零件做测试，其中2个都达到600万次以上，另外1个才100多万就断了。
金相检查发现材料有较多夹杂物，不知道弹簧钢对夹杂的要求是怎么样的，像这样长29um，宽3.5um的夹杂，是不是超标了呢？

夏日凉风

才29um，应该不超。

我心飞翔

就怕集中在一起，那样性能不好

zhenlinchuan

应该不算超标的。。



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清淡

我以前也做夹杂，一直没有具体的要求，只是要检测。只有一家说长度不超多少就算合格{:soso_e127:}。严工这个看上去不算大，但是你说多就不知道了，断口如果能做个扫描就好了，看看韧窝大小。

清淡

我们送过很多委外分析，很多与几乎份份报告都说是材料缺陷，但是弹簧对表面缺陷确实很敏感，毕竟是以疲劳断裂为主。你这个要仔细检查断口周边缺陷，并且找到裂纹源。

轧辊技术

不超标，就看是什么夹杂物了，A.B.C那种

村长

不知道分布情况如何，还是像这样偶尔的视场存在还是不是很严重的，弹簧属于高周疲劳，有时候表面缺陷就导致失效，尽量严格控制即可。

笑靥

你这种评判有问题，夹杂物要求在100X下评判，规定面积内各类型夹杂物总数（个数，长度，或者直径大小）。可以用1000X便于判断形态，类型，但你要保证所有1000X的总照片面积等于规定的100X 下的面积，然后各类型夹杂物代数和相加。