Study on submerged arc welding process and weld microstructure and properties of bimetallic composite pipes

YANG Jun; BI Zongyue; ZHU Lei; WAN Renyuan; WANG Xueyi

doi:10.7513/j.issn.1004-7638.2026.01.022

Volume 47 Issue 1

Feb. 2026

Turn off MathJax

Article Contents

Article Navigation > IRON STEEL VANADIUM TITANIUM > 2026 > 47(1): 189-196

YANG Jun, BI Zongyue, ZHU Lei, WAN Renyuan, WANG Xueyi. Study on submerged arc welding process and weld microstructure and properties of bimetallic composite pipes[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 189-196. doi: 10.7513/j.issn.1004-7638.2026.01.022

Citation:

YANG Jun, BI Zongyue, ZHU Lei, WAN Renyuan, WANG Xueyi. Study on submerged arc welding process and weld microstructure and properties of bimetallic composite pipes[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 189-196. doi: 10.7513/j.issn.1004-7638.2026.01.022

Citation:

PDF( 4002 KB)

Study on submerged arc welding process and weld microstructure and properties of bimetallic composite pipes

doi: 10.7513/j.issn.1004-7638.2026.01.022

YANG Jun^{1, 2
,},
BI Zongyue³,
ZHU Lei⁴,
WAN Renyuan^{1, 2},
WANG Xueyi^{1, 2}

1.
Shaanxi Railway Institute, Weinan 714000, Shaanxi, China
2.
Weinan Special Equipment Materials Engineering Technology Research Center, Weinan 714000, Shaanxi, China
3.
CNPC Baoji Petroleum Pipe Industry Co., Ltd., Baoji 721008, Shaanxi, China
4.
Xi’an Tianli Clad Metal Materials Co. , Ltd. , Xi’an 710200, Shaanxi, China

More Information

Received Date: 2025-07-27
Accepted Date: 2025-09-11
Rev Recd Date: 2025-09-09

Available Online: 2026-02-25

Publish Date: 2026-02-25

Abstract

Abstract

The microstructures of the composite interface of the hot-rolled coil and the weld joint of the composite pipe were observed using an optical microscope (OM) and a scanning electron microscope (SEM). The line distribution curve of the element content change at the interface was determined by energy dispersive spectrometer (EDS) line scanning test, and the distribution of elements in different micro-regions of the fusion zone of the composite pipe weld joint was measured by EDS mapping analysis. Meanwhile, tensile test, Charpy impact test, bending test, microhardness test and corrosion test were carried out on the weld joint of the composite pipe. The results indicate that the submerged arc welding (SAW) process can be successfully used for the commercial production of 304/Q235B Ø610 mm×(6+1) mm composite pipes. The microstructure of the cladding weld of the composite pipe is a duplex structure consisting of acicular austenite + banded or worm-like ferrite, while the base weld exhibits a duplex structure of reduced proeutectoid ferrite + acicular ferrite. All mechanical properties including weld strength, low-temperature toughness, microhardness, and plastic deformation, as well as intergranular corrosion resistance, fully meet the requirements specified in the national standard GB/T 31940-2015 bimetallic composite corrosion-resistant steel pipes for fluid transport. Therefore, this research results can be used as a theoretical reference and technical support for the commercial production of high-quality bimetallic composite pipes.
- bimetallic composite pipe,
- composite interface,
- submerged arc welding,
- intergranular corrosion resistance

FullText(HTML)

References(19)

References

[1]	YAO G H, LIU M, YE W H, et al. Effect of microstructure on the hydrogen cracking behavior of bimetallic metallurgical clad pipes: The role of precipitated phases and inclusions[J]. International Journal of Hydrogen Energy, 2025, 137(7): 13-25.
[2]	SUN Y W, YU S R, WANG B Y, et al. Study on pitting behavior of welding joint of bimetal composite pipes in suspended sulfur solution[J]. Crystals, 2025, 15(2): 165-172. doi: 10.3390/cryst15020165
[3]	EVGENIIA P, KRISTINA K, IVAN K, et al. Microstructure, physical-mechanical, and magnetic characteristics of a butt-welded joint obtained by rotary friction welding technology of bimetallic pipe[J]. Journal of Manufacturing and Materials Processing, 2024, 8(6): 271-279. doi: 10.3390/jmmp8060271
[4]	LI B W, ZHANG M, ZHANG K R, et al. The nucleation and growth of fine austenitic grain at interface of the L415QS/N08825 bimetallic composite pipe by explosive welding[J]. Materials Letters, 2024, 367: 136593. doi: 10.1016/j.matlet.2024.136593
[5]	WANG B, LAN H X, LEI B B. Effect of elding method on microstructure and mechanical properties of L360QS/N08825 composite pipe welded joint[J]. Transactions of the Indian Institute of Metals, 2020, 73(7): 629-643.
[6]	WANG B, LEI B B, WANG W, et al. Investigations on the crack formation and propagation in the dissimilar pipe welds involving L360QS and N08825[J]. Engineering Failure Analysis, 2015, 58(8): 56-63.
[7]	NING Y Q, QIU S F, TANG L, et al. Study on microstructure and properties of welded joint of L360QS/N08825 bimetallic composite pipe[J]. Journal of Materials Engineering and Performance, 2024, 34(2): 1-10.
[8]	WANG L, WU D, CUI C W, et al. In situ observation on fracture behavior of the three-phase zone of the L415/N08825 bimetallic composite pipe welded joint[J]. Engineering Fracture Mechanics, 2022, 276: 108898. doi: 10.1016/j.engfracmech.2022.108898
[9]	WANG L, WU D, XU M, et al. Microstructure and mechanical properties of L415/N08825 bimetallic composite pipe welded joint using GTAW + SMAW[J]. Archives of Civil and Mechanical Engineering, 2022, 23(1): 18. doi: 10.1007/s43452-022-00554-x
[10]	GOU N N, ZHANG L J, ZHANG J X. Increased quality and welding efficiency of laser butt welding of 2205/X65 bimetallic sheets with a lagging MIG arc[J]. Journal of Materials Processing Technology, 2017, 251: 83-92.
[11]	BI Z Y, YANG J, LIU H Z, et al. Investigation on the welding process and microstructure and mechanical property of butt joints of TA1/X65 clad plates[J]. Acta Metallurgica Sinica, 2016, 52(2): 1017-1024. (毕宗岳, 杨军, 刘海章, 等. TA1/X65复合板焊接工艺及焊缝组织和性能研究[J]. 金属学报, 2016, 52(2): 1017-1024. BI Z Y, YANG J, LIU H Z, et al. Investigation on the welding process and microstructure and mechanical property of butt joints of TA1/X65 clad plates[J]. Acta Metallurgica Sinica, 2016, 52(2): 1017-1024.
[12]	YANG J, BI Z Y, NIU H, et al. Research on welding process, microstructure and mechanical property of TA1/X65 clad plates[J]. Welded Pipe and Tube, 2015, 38(6): 1-10. (杨军, 毕宗岳, 牛辉, 等. TA1/X65复合板焊接工艺及焊缝组织和性能研究[J]. 焊管, 2015, 38(6): 1-10. doi: 10.11900/0412.1961.2015.00615 YANG J, BI Z Y, NIU H, et al. Research on welding process, microstructure and mechanical property of TA1/X65 clad plates[J]. Welded Pipe and Tube, 2015, 38（6）: 1-10. doi: 10.11900/0412.1961.2015.00615
[13]	CHU Q L, ZHANG M, LI J H, et al. Effect of Cu on microstructure evolution and mechanical properties of Fe-Nb dissimilar welds[J]. Materials Letters, 2019, 234: 113-116. doi: 10.1016/j.matlet.2018.09.086
[14]	CHU Q L, BAI R X, ZHANG M, et al. Microstructure and mechanical properties of titanium/steel bimetallic joints[J]. Materials Characterization, 2017, 132: 330-337. doi: 10.1016/j.matchar.2017.08.025
[15]	CHU Q L, ZHANG M, LI J H, et al. Experimental and numerical investigation of microstructure and mechanical behavior of titanium/steel interfaces prepared by explosive welding[J]. Materials Science and Engineering A, 2017, 689: 323-331. doi: 10.1016/j.msea.2017.02.075
[16]	LUO H L, ZHANG M, MU E L, et al. Microstructures and microhardness of TA1/Q235B joints welded by TIG with Cu-based flux-cored wire[J]. Transactions of The China Welding Institution, 2019, 40(1): 141-147. (罗海龙, 张敏, 慕二龙, 等. Cu基药芯焊丝TIG焊TA1/Q235B接头微观组织和显微硬度[J]. 焊接学报, 2019, 40(1): 141-147. doi: 10.12073/j.hjxb.2019400028 LUO H L, ZHANG M, MU E L, et al. Microstructures and microhardness of TA1/Q235B joints welded by TIG with Cu-based flux-cored wire[J]. Transactions of The China Welding Institution, 2019, 40（1）: 141-147. doi: 10.12073/j.hjxb.2019400028
[17]	ZHANG M, MU E L, WANG X W, et al. Microstructure and mechanical property of the welding joint of TA1/Cu/X65 trimetallic sheets[J]. Acta Metallurgica Sinica, 2018, 54(7): 1068-1076. (张敏, 慕二龙, 王晓伟, 等. TA1/Cu/X65复合板焊接接头微观组织及力学性能[J]. 金属学报, 2018, 54(7): 1068-1076. doi: 10.11900/0412.1961.2017.00423 ZHANG M, MU E L, WANG X W, et al. Microstructure and mechanical property of the welding joint of TA1/Cu/X65 trimetallic sheets[J]. Acta Metallurgica Sinica, 2018, 54（7）: 1068-1076. doi: 10.11900/0412.1961.2017.00423
[18]	ZHANG M, WANG X W, HAN T, et al. Effect of intermediate Cu-layer on mechanical properties of welded joints of TA1/X65 composite plate[J]. Chinese Journal of Materials Research, 2018, 32(2): 81-89. (张敏, 王晓伟, 韩挺, 等. 中间Cu层对TA1/X65复合板熔焊接头性能的影响[J]. 材料研究学报, 2018, 32(2): 81-89. doi: 10.11901/1005.3093.2017.215 ZHANG M, WANG X W, HAN T, et al. Effect of intermediate Cu-layer on mechanical properties of welded joints of TA1/X65 composite plate[J]. Chinese Journal of Materials Research, 2018, 32（2）: 81-89. doi: 10.11901/1005.3093.2017.215
[19]	LIU Y, YANG J. Study on microstructure and properties of Q235B/SUS304 spiral metallurgy composite pipe welded joint by submerged arc welding[J]. Welding & Joining, 2019(10): 38-46, 51. (刘云, 杨军. Q235B/SUS304 螺旋冶金复合管埋弧焊接头的组织和性能[J]. 焊接, 2019(10): 38-46, 51. doi: 10.12073/j.hj.20190327002 LIU Y, YANG J. Study on microstructure and properties of Q235B/SUS304 spiral metallurgy composite pipe welded joint by submerged arc welding[J]. Welding & Joining, 2019（10）: 38-46, 51. doi: 10.12073/j.hj.20190327002