公开(公告)号：WO2013140798A2

公开(公告)日：2013-09-26

申请号：PCT/JP2013/001898

申请日：2013-03-21

Applicant: HITACHI ZOSEN CORPORATION

Inventor： NAKATANI, Mitsuyoshi ,  ABE, Masamitsu ,  YAMADA, Junya

CPC classification number: B23K9/23 ,  B23K9/186 ,  B23K31/02 ,  B23K31/125 ,  B23K2201/12 ,  C21D9/50 ,  C21D2251/04 ,  C22C38/22 ,  C22C38/24 ,  Y10T428/12972

Abstract: A method of welding structural steel containing, by mass%, Cr: 1.5 to 3.5%, Mo: 0.5 to 1.5%, and V: 0.15 to 0.5%. It comprises preheating joint of the structural steel to be welded at temperatures of 150 to 250 degrees Celsius; multilayer welding the joint end portions; keeping the interpass temperature of the joint end portions during the multilayer welding at 150 to 350 degrees Celsius; then after welding completion, performing DHT by heat treating the weld zone before cooling down below 150 degrees Celsius under the conditions that the temperature is 250 to 340 degrees Celsius and that the treatment time is 5 to 10 hours.

Abstract translation: 以质量％计含有Cr：1.5〜3.5％，Mo：0.5〜1.5％，V：0.15〜0.5％的结构钢的焊接方法。 它包括在150至250摄氏度的温度下待焊接的结构钢的预热接头; 多层焊接接头端部; 在多层焊接中将接头端部的层间温度保持在150〜350摄氏度; 然后在焊接完成后，在温度为250-340摄氏度的条件下，并且处理时间为5〜10小时的条件下，在冷却到低于150摄氏度之前对焊接区进行热处理，进行DHT。