-
公开(公告)号:US4062705A
公开(公告)日:1977-12-13
申请号:US492754
申请日:1974-07-29
CPC分类号: C21D9/50 , B23K35/3053 , Y10T428/12493
摘要: A method for obtaining a weld metal having excellent toughness at low temperatures as below -40.degree. C, which method comprises heating the weld metal having a specific steel composition to its austenitizing temperature and cooling it or holding it at the temperature for not longer than 25 minutes and then quenching and tempering it. In order to further improve the low temperature toughness, the weld metal is reheated again to the Ac.sub.1 to Ac.sub.3 range. Excellent low temperature toughness of the weld metal can be obtained without the necessity of using any special welding materials.
摘要翻译: 一种获得在低于-40℃的低温下具有优异韧性的焊接金属的方法,该方法包括将具有特定钢组成的焊接金属加热至其奥氏体化温度并冷却或将其保持在不超过25℃的温度 几分钟,然后淬火回火。 为了进一步提高低温韧性,将焊接金属再次加热至Ac1〜Ac3的范围。 无需使用任何特殊的焊接材料即可获得焊接金属的优异的低温韧性。
-
2.
公开(公告)号:US3973999A
公开(公告)日:1976-08-10
申请号:US595310
申请日:1975-07-11
摘要: A method for producing a high tensile strength and toughness bend pipe in which a heat treatment is done as a pretreatment prior to bending, and a tempering treatment is done, if necessary, after the bending, and the bend pipe produced by the present invention is useful for pipe line construction and shows excellent properties at low temperatures.
摘要翻译: 制造弯曲前的预处理进行热处理的高抗拉强度和韧性弯曲管的方法,如果需要,进行回火处理后的弯曲,本发明制造的弯曲管是 适用于管线施工,在低温下表现出优异的性能。
-