螺旋埋弧预精焊内焊焊缝及HAZ硬度试验研究  

Research on Spiral Two-steps Welding Inside Weld and HAZ Hardness Test

作　　者：王兴山[1] 苟世峰 王刚[1] 阎龙[1] 王晓东[1] 马朝辉[1] 张江磊[1] 胡绪波[1] 

机构地区：[1]宝鸡石油钢管有限责任公司,陕西宝鸡721008

出　　处：《焊管》2015年第12期33-39,共7页Welded Pipe and Tube

摘　　要：针对螺旋埋弧预精焊生产过程中偶尔发生的内焊焊缝及热影响区(HAZ)硬度超标的问题,以X80M管线钢管的生产为例,通过对焊接坡口、预精焊匹配参数、焊接参数及工艺等的调整试验,研究了参数变化对内焊焊缝及HAZ硬度的影响。试验及分析结果表明,在X80M管线钢管生产过程中,调整焊接参数和焊接工艺在一定程度上可以有效降低内焊焊缝及HAZ的硬度,从而保证螺旋预精焊两步法生产的钢管的力学性能。Aiming at the hardness exceeding standard problems occasionally occur in inside weld and HAZ during spiral submerged are two-steps welding production, taking X80M line pipe production as example, it studied the influence of parameter variation on inside weld and HAZ hardness through several adjustment tests, such as welding groove, matching parameter, welding parameters, welding process and so on. The results indicated that in the production process of X80M line pipe, adjusting welding parameters and welding process can effectively reduce the hardness of weld and HAZ to a certain degree, thus to ensure the mechanical properties of two-steps welding steel pipe.

关 键 词：焊管 螺旋预精焊 焊接速度 硬度 内焊焊缝 HAZ 

分 类 号：TG115.5[金属学及工艺—物理冶金]