Research on large heat input SAW joints pro-perties of F460Z high strength steel for ocean engineering

ZENG Peng; YI Jie; ZHOU Quan; LUO Yang; SHEN Xiaochun

doi:10.7512/j.issn.1001-2303.2021.01.13

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Research on large heat input SAW joints pro-perties of F460Z high strength steel for ocean engineering
Vol. 51, Issue 1, Pages: 83-88(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.01.13
稿件说明：

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DOI：

ZENG Peng, YI Jie, ZHOU Quan, et al. Research on large heat input SAW joints pro-perties of F460Z high strength steel for ocean engineering[J]. Eletric Welding Machine2021, 51(1): 83-88. DOI： 10.7512/j.issn.1001-2303.2021.01.13.

摘要

采用CHW-S3AB型焊丝匹配CHF102型烧结焊剂

在50 kJ/cm大热输入下进行埋弧自动焊焊接F460Z钢

研究F460Z钢焊接接头力学性能、金相组织和断口形貌。结果表明:当焊接电流为750 A、焊接电压为39 V、焊接速度为33.3 cm/min、预热温度为180℃时

可获得最优焊接接头

其抗拉强度为583 MPa

焊缝、熔合线和热影响区-60℃冲击吸收能量分别为55 J、62 J和71 J

焊缝组织主要由针状铁素体组成

焊接接头各项指标均满足标准要求

为大热输入埋弧焊在海洋工程领域的应用提供了理论和试验依据。

Abstract

The SAW with large heat input（50 k J/cm） is used for automatic welding of F460 Z high strength steel with CHW-S3 AB wire and CHF102 flux. The mechanical prope-rties

microstructures and fracture morphology of the welded joints are researched. The results show that when the welding parameters are wleding current of 750 A

welding voltage of 39 V

welding speed of 33.3 mm/min

and preheating temperature at 180 ℃

the optimal joint is obtained

and its tensile strength is 583 MPa. The impact absorption powers of weld

bond line and HAZ at-60 ℃ are 55 J

62 J and 71 J respectively. The weld microstructure is mainly composed of acicular ferrite

and all indexes of welded joint meet the standard requipments.This provides theoretical and experimental basis for the application of SAW with large heat input in ocean engineering.