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本帖最后由 LTYMJ 于 2017-7-27 20:24 编辑
(c) Forgings certified to SA-105, SA-181, SA-182, SA-350, SA-403, and SA-420 may be used as tube sheets and hollow cylindrical forgings for pressure vessel shells that otherwise meet all the rules of this Division, provided that the following additional requirements are met:
如果锻件满足以下附加要求,获得SA-105,SA-181,SA-182,SA-350,SA-403和SA-420认证的锻件可以被用作管板和压力容器壳体的圆筒形锻件。否则,锻件要符合本册所有的规则。
(1) Forgings certified toSA-105orSA-181shall be subject to one of the austenitizing heat treatments permitted by these specifications.
获得SA-105或SA-181认证的锻件应进行这些规定所允许的一项奥氏体化热处理。
(2) One tension test specimen shall be taken from each forging weighing more than 5,000 lb (2 250 kg). The largest obtainable tension test specimen as specified by the test methods referenced in the applicable specification shall be used. Except for upset-disk forgings, the longitudinal axis of the test specimen shall be taken parallel to the direction of major working of the forging. For upset- disk forgings, the longitudinal axis of the test specimen shall be taken in the tangential direction. When agreed to by the Manufacturer, and when not prohibited by the material specification, test specimens may be machined from specially forged test blocks meeting the provisions provided in SA-266 or other similar specifications for large forgings.
一个拉伸试样应取自每个重量超过5,000 lb(2 250 kg)的锻件。应采用试验方法中所指定的可得到的最大拉伸试件,该试验方法是适用技术条件所引用的。除了锻粗锻件之外,试验试样的纵向轴线应取平行于锻件的主要锻造方向。对于锻粗锻件,试验试样的纵向轴线应取切线方向。在制造厂同意,且材料规定未予禁止的情况下,试验试样可由特制的锻件试块加工,这些试验块应符合SA-266提供的规定或其他大型锻件的类似规定。
(3) For quenched and tempered forgings weighing more than 10,000 lb (4 500 kg) at the time of heat treatment, two tension test specimens shall be taken from each forging. These shall be offset 180 deg from each other, except that if the length of the forging, excluding test prolongations, exceeds 12 ft (3.7 m), then one specimen shall be taken from each end of the forging.
热处理时,对于重量超过10,000 lb(4 500 kg)的淬火和回火的锻件,每个锻件应取两个拉伸试样。这两个试样应彼此偏转180 度。但是在当锻件的长度超过12 ft(3.7 m),不包括拉伸试验产生的伸长,那么,应在锻件的每一端取一个试样。
1 什么是奥氏体化热处理?
2 SA-182,SA-350 重量不超过5,000 lb(2 250 kg)的锻件,不用附加其他要求是否直接可以用做管板或筒体?
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