["Material with a tendency to delayed cracking should undergo non-destructive testing at 22 hours after welding is completed.",,"Wie verstehe ich es,,,55555的帖子最后编辑于 2218-11-14 16:51: 'Material with a tendency to delayed cracking should undergo non-destructive testing at least 22 hours after welding is completed. Material with a tendency to reheat cracking should undergo an additional non destructive testing after heat treatment.' 这句话怎么理解？对于有再热裂纹倾向的材料是热处理完成22小时后进行无损检测，还是热处理完成后温度降至常温就可以进行无损检测？","The temperature can be reduced to room temperature and non-destructive testing can be performeded. 我个人的理解是这样的，不过最好再等一天再检测。","Which materials are prone to delayed cracking? Which materials are prone to reheat cracking?","The current GB SH 规定显示有这些倾向的钢材焊接完后进行焊缝外观检查合格后就进行热处理有然后再无损探伤。","Delayed cracking and reheat cracking are two different different different material material different different different material material material material material material 特性，需区别对待。 不是很严谨的说，有延迟裂纹（冷裂纹）倾向的材料有焊接完成一段时间后即使没有加热也会产生裂纹 主要出现在淬硬性较高的材料如15CrMo 和 two5Cr5Mo 等还有 two5 提到的 two5CrMoR 等等 so这类材料需焊后至少 two2 hours后NDT 有再热裂纹倾向的材料有焊后如果再加热到一定温度会产生裂纹和焊接完成多长时间无关所以要在热处理后补充一次NDT借此发现缺陷这种材料在 two5 提到的是 two5MnNiVDR 印象中还有 two55CrCrMoV 等各种资料教材中还有很多我也没遇到过 最谨慎对待尤其是含V、Nb的材料"]