12-11-2014 дата публикации
Номер: CN104139228A
Принадлежит:
The invention relates to a thick steel plate welding process. The thick steel plate welding process comprises the following steps: (1) the welding part of a thick steel plate is determined; a groove is formed in the welding part, and is polished; and the polishing range is the groove and 30 mm of area around the groove; (2) 100-150 mm of preheating range at the two sides of the welding line is preheated; the temperature in 100 mm of range around the welding line is monitored; and when the temperature of the monitored preheating range is within the range of 100-180 DEG C, the preheating meets the requirements; (3) when the preheating meets the requirements, the welding is performed immediately; (4) after the welding is finished, the welding line is heated to perform the after-welding hydrogen elimination heat treatment; and the welding line is insulated; and (5) after the welding is finished, the nondestructive testing is performed for the welding line; if the testing result dose not meet ...
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