石化装置9Cr1Mo钢炉管焊接接头的回火脆性  

COARSE GRAINED REGION TEMPER EMBRITTLE OF WELDED JOINT ON FURNACE TUBE MADE OF 9Cr 1Mo STEEL

作　　者：龙国文[1] 

机构地区：[1]石油大学机械系

出　　处：《石油大学学报（自然科学版）》1999年第1期69-71,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：利用热模拟、“阶冷”和等温脆化等试验方法，对９Ｃｒ１Ｍｏ钢炉管焊接接头粗晶区的回火脆性进行了研究。试验结果表明，ＳＲ处理时，９Ｃｒ１Ｍｏ钢炉管焊接接头粗晶区对回火脆性敏感，其敏感温度范围为４５０～５５０℃，但当炉管在高温下长期工作时对回火脆性不敏感。炉管不预热焊接时粗晶区的韧性优于预热２００℃时的韧性。试验还证明，工作应力对粗晶区回火脆性的影响不大。The temper embrittlement of coar grained region of welded joint on furnace tube made of 9Cr 1Mo steel were studied by the use of thermal simulation test, step cooling test and isothermal embrittlement experiment. The coarse grained region of the welded joint on this kind of furnace tube is sensitive to temper embrittle under thermal simulation treatment, and the sensitive temperature is from 450 ℃ to 550 ℃. Under a high temperature, it is not sensitive to temper embrittlement. Toughness of coarse grained region of the furnace tube welded without being preheated is better than that with being preheated to 200 ℃. The tests prove that the working stress has little effect on the temper embrittlement of the coarse grained region.

关 键 词：炉管 焊接 回火 脆性 试验 石油化工设备 

分 类 号：TE963.06[石油与天然气工程—石油机械设备]