Impact of Heat Input on the Structure and Properties of TTS443 Ferrite Stainless Steel Laser Welding Joints

HAN Liying; WANG Xin

doi:10.7512/j.issn.1001-2303.2025.04.16

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Impact of Heat Input on the Structure and Properties of TTS443 Ferrite Stainless Steel Laser Welding Joints
Vol. 55, Issue 4, Pages: 122-127(2025)
Received：22 October 2024，

Published：20 April 2025
DOI： 10.7512/j.issn.1001-2303.2025.04.16
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韩丽营，王新.热输入对TTS443铁素体不锈钢激光焊接接头组织及性能的影响［J］.电焊机，2025，55（4）：122-127. DOI： 10.7512/j.issn.1001-2303.2025.04.16.

HAN Liying, WANG Xin.Impact of Heat Input on the Structure and Properties of TTS443 Ferrite Stainless Steel Laser Welding Joints[J].Electric Welding Machine, 2025, 55(4): 122-127. DOI： 10.7512/j.issn.1001-2303.2025.04.16.

摘要

采用激光自熔焊对热轧态的1.5 mm厚的TTS443铁素体不锈钢薄板进行试验，研究了不同焊接热输入对接头组织、显微硬度和静载拉伸性能的影响。结果表明，随着热输入增加，熔合区平均宽度增大，熔合区为粗大的铁素体柱状晶组织，母材区为细小均匀的铁素体组织，热影响区晶粒虽有明显长大但接近母材。焊接热输入低于20 J/mm时，焊缝未焊透；焊接热输入大于20 J/mm时，焊缝成形良好，但随着热输入增加，熔合线位置颜色加深，焊缝美观度降低。当焊接热输入为24 J/mm时，接头成形美观，显微硬度从焊缝中心到热影响区一直到母材部分呈下降趋势，且静载拉伸性能达到母材的95%以上，能够满足实际生产应用。

Abstract

Laser self-fusion welding experiments were conducted on 1.5 mm thick hot-rolled TTS443 ferrite stainless steel sheets to study the effects of different welding heat inputs on the joint structure

microhardness

and static tensile properties. The results show that as the heat input increases

the average width of the fusion zone increases. The fusion zone has a coarse ferrite columnar grain structure

while the base metal zone has a fine and uniform ferrite structure. Although the grain size in the heat-affected zone grows significantly

it is close to that of the base metal. When the welding heat input is less than 20 J/mm

the weld is not penetrated; when the welding heat input is greater than 20 J/mm

the weld formation is good

but as the heat input increases

the color at the fusion line deepens

reducing the aesthetic appearance of the weld. When the welding heat input is 24 J/mm

the joint formation is aesthetically pleasing. The microhardness shows a decreasing trend from the center of the weld to the heat-affected zone and all the way to the base metal

and the static tensile properties reach more than 95% of the base metal

meeting the requirements for actual production applications.

关键词

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references

张心保 . 新型低成本铁素体不锈钢焊接接头的微观结构及塑韧性研究［D］. 湖北：武汉科技大学， 2023 .

ZHANG X B . Study on the Microstructure and Plasticity-Toughness of a New Low-Cost Ferrite Stainless Steel Welded Joint ［D］. Hubei ： Wuhan University of Science and Technology ， 2023 .

刘振宇，江来珠 . 铁素体不锈钢的物理冶金学原理及生产技术［M］. 北京：冶金工业出版社， 2014 .

蔡淑娟，朱亮，龚练 . 热输入对430铁素体不锈钢热影响区组织和韧性的影响［J］. 兰州理工大学学报， 2016 ， 42 （ 02 ）： 24 - 31 .

CAI S J ， ZHU L ， GONG L . The effect of heat input on the microstructure and toughness of the heat-affected zone of 430 ferrite stainless steel ［J］. Journal of Lanzhou University of Technology ， 2016 ， 42 （ 02 ）： 24 - 31 .

孙铭旭 . 铁素体不锈钢超薄板冷焊工艺及接头组织与性能研究［D］. 辽宁：大连交通大学， 2023 .

SU M X . Study on the cold welding process and joint microstructure and properties of ultra-thin ferrite stainless steel ［D］. Liaoning ： Dalian Jiaotong University ， 2023 .

范沥元 . 铁素体不锈钢焊接的研究和发展现状［J］. 机械制造文摘（焊接分册）， 2014 （ 02 ）： 9 - 13 .

FAN L Y . Research and Development Status of Ferrite Stainless Steel Welding ［J］. Machinery Manufacturing Abstract （Welding Issue）， 2014 （ 02 ）： 9 - 13 .

Xu L ， Yang H F ， Cui H ， et al . Key technology and application of high power laser welding for railway vehicles ［J］. Journal of Changchun University of Technology ， 2022 ， 43 （ 4/5 ）： 382 - 386 .

高天，赵朋成，燕国帅，等 . 430铁素体不锈钢薄板激光焊接背面飞溅和熔池动态的数值模拟［J］. 电焊机， 2024 ， 54 （ 08 ）： 118 - 127 .

GAO T ， ZHAO P C ， YAN G S ， et al . Numerical Simulation of Back Spatter and Molten Pool Dynamics in Laser Welding of 430 Ferrite Stainless Steel Thin Plates ［J］. Electric Welding Machine ， 2024 ， 54 （ 08 ）： 118 - 127 .

Palanivel R ， Dinaharan I ， Asfer m ， et al . Effect of laser power on metallurgical and tensile properties of CO2 laser welded AISI 409 ferritic stainless steel tuber ［J］. Opti and Laser Technology ， 2025 ， 182 ： 112088 .

Doomra A ， Singh B ， Sandhu S S . Weldability studies of AISI 409 ferritic stainless steel thick plates using electron beam welding process ［J］. International Journal of Manufacturing，Materials，and Mechanical Engineering ， 2021 ， 11 （ 2 ）： 55 - 67 .

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