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发表于 2012-7-7 08:14:59
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我个人理解是可以的,ASME规范和国内的标准一样,都是规定加工温度大于495的温度以上就是热处理了,而对于不锈钢来说,热处理状态只有固溶处理和不热处理,详见ASME IX QW-407.1(b)的规定,QW-407.1(a)已经给出属于(a)范围热处理的材料P-No.。
而热处理的温度范围是可以有所改变的,下面的解释是我从Interpretations 上贴下来的。已经在论坛里上传了!
Interpretation: IX-04-03
Subject: QW-407.1, Postweld Heat Treatment
Date Issued: September 15, 2003
File: BC03-1212
Question (1): May a procedure qualification record subject to the variable QW-407.1(a), which qualified
P8 to P8 with no PWHT, support a WPS with PWHT?
Reply (1): QW-407.1(a) does not apply to P8 materials. See QW-407.1(b).
Question (2): Would application of controlled and monitored heat to the weld and surrounding area for
the correction of distortion in P8 material be considered a PWHT operation?
Reply (2): See QW-407.1(b).
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