Study and Application of Welding Procedure for Hastelloy B3 and SA-516 Gr70

YUAN Xiaogang; CAO Xuejia; SUN Xiusheng

doi:10.7512/j.issn.1001-2303.2025.12.08

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Study and Application of Welding Procedure for Hastelloy B3 and SA-516 Gr70
Vol. 55, Issue 12, Pages: 50-59(2025)
Received：26 May 2025，

Revised：2025-08-22，

Published：20 December 2025
DOI： 10.7512/j.issn.1001-2303.2025.12.08
稿件说明：

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苑晓刚，曹雪佳，孙修圣.Hastelloy B3与SA-516 Gr70焊接工艺研究及应用［J］.电焊机，2025，55（12）：50-59. DOI： 10.7512/j.issn.1001-2303.2025.12.08.

YUAN Xiaogang, CAO Xuejia, SUN Xiusheng.Study and Application of Welding Procedure for Hastelloy B3 and SA516 Gr.70[J].Electric Welding Machine, 2025, 55(12): 50-59. DOI： 10.7512/j.issn.1001-2303.2025.12.08.

摘要

为实现Hastelloy B3与SA-516 Gr70异种钢间的可靠连接，本文采用钨极氩弧焊开展相关焊接工艺研究。分别选用ERNiMo-10、ERNiCrMo-3及ER309LMo三种焊丝进行焊接试验，并通过射线探伤，以及拉伸、弯曲、硬度、冲击等试验，对异种钢焊缝质量、焊接接头的力学性能进行评价。试验结果显示：三种焊丝均可以得到满足要求的焊接接头。其中，ERNiMo-10焊接过程稳定，焊接操作性最佳；ERNiCrMo-3焊接时虽存在微偏弧现象，但熔池状态清亮，且与两侧母材的熔合性最优；ER309LMo焊接时，需控制Hastelloy B3侧熔合区的成分稀释，对焊工施焊技能要求最高。三组试件接头的抗拉强度处于629-646MPa范围内，断裂均发生在SA-516 Gr70侧母材，侧向弯曲试样无开口缺陷，异种钢接头熔合状况良好。为完成酯化进料罐筒体与夹套之间的产品焊接，综合考量焊材成本及焊接施焊技能要求，选用ERNiCrMo-3焊丝与ENiCrMo-3焊条，采用钨极氩弧焊和焊条电弧焊相结合的方式，对 12.7mm厚的Hastelloy B3与SA-516 Gr70试板进行焊接工艺组合评定。评定结果表明，试板焊接接头的抗拉强度、弯曲性能以及SA-516 Gr70侧热影响区的冲击性能，均满足承压设备焊接工艺评定的要求，能够完成酯化进料罐筒体与夹套之间焊接。

Abstract

To achieve reliable joining between Hastelloy B3 and SA-516 Gr70 dissimilar steels

this paper conducts research on relevant welding processes using gas tungsten arc welding (GTAW). Welding tests are carried out with three types of welding wires

namely ERNiMo-10

ERNiCrMo-3

and ER309LMo. The quality of the dissimilar steel welds and the mechanical properties of the welded joints are evaluated through X-ray flaw detection

as well as tensile

bending

hardness

and impact tests. The test results show that all three types of welding wires can produce qualified welded joints. Among them

the welding process with ERNiMo-10 is stable

and its welding operability is the best; although there is a slight arc deviation phenomenon when welding with ERNiCrMo-3

the molten pool is clear

and its fusion with the base metals on both sides is the best; when welding with ER309LMo

it is necessary to control the composition dilution in the fusion zone on the Hastelloy B3 side

which has the highest requirement for the welder's operating skills. The tensile strength of the joints of the three groups of specimens ranges from 629 MPa to 646 MPa

and fractures all occur in the base metal on the SA-516 Gr70 side. The lateral bending specimens have no opening defects

indicating good fusion of the dissimilar steel joints. To complete the product welding between the cylinder and jacket of the esterification feed tank

considering the cost of welding materials and the requirements for welding skills comprehensively

ERNiCrMo-3 welding wire and ENiCrMo-3 electrode are selected

and a combined welding process evaluation is carried out on 12.7 mm thick Hastelloy B3 and SA-516 Gr70 test plates using the combination of gas tungsten arc welding and shielded metal arc welding. The evaluation results show that the tensile strength

bending performance of the welded joints of the test plates

and the impact performance of the heat-affected zone on the SA-516 Gr70 side all meet the requirements of the welding procedure qualification for pressure equipment

which enables the completion of the welding between the cylinder and jacket of the esterification feed tank.

关键词

Keywords

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