Study on Resistance Spot Welding Process of DH980 High Strength Steel

ZHANG Ze; YU Wenchao; JIA Lei; HAN Lijun; GAO Yang; WU Xuesong

doi:10.7512/j.issn.1001-2303.2024.03.19

Welding Technology | Views : 0 下载量: 0 CSCD: 0 更多指标

PDF
Export
Share
Collection
Album

Study on Resistance Spot Welding Process of DH980 High Strength Steel
Vol. 54, Issue 3, Pages: 128-134(2024)
Published： 25 March 2024 ，
DOI： 10.7512/j.issn.1001-2303.2024.03.19

扫描看全文

张泽，余文超，贾磊，等.DH980高强钢电阻点焊工艺研究［J］.电焊机，2024，54（3）：128-134.

ZHANG Ze, YU Wenchao, JIA Lei, et al.Study on Resistance Spot Welding Process of DH980 High Strength Steel[J].Electric Welding Machine, 2024, 54(3): 128-134.
张泽，余文超，贾磊，等.DH980高强钢电阻点焊工艺研究［J］.电焊机，2024，54（3）：128-134. DOI： 10.7512/j.issn.1001-2303.2024.03.19.

ZHANG Ze, YU Wenchao, JIA Lei, et al.Study on Resistance Spot Welding Process of DH980 High Strength Steel[J].Electric Welding Machine, 2024, 54(3): 128-134. DOI： 10.7512/j.issn.1001-2303.2024.03.19.

摘要

以汽车车身DH980-GI钢板电阻点焊为研究对象，通过参数实验优化设计，接头强度、接头硬度和接头抗点焊液态金属脆（LME）分析等手段，研究了焊接电流等参数对钢板电阻点焊接接头性能的影响，并对板材的点焊液态金属脆敏感性进行测试研究。试验结果显示，在电极压力4.5 kN、焊接时间380 ms的条件下，焊接电流在6.8~8.1 kA内，不同电流的接头熔核区域显微硬度值相近，均在470~510 HV内，熔核直径均满足标准要求。LME测试结果显示，在6.8~10.5 kA电流范围内未出现LME裂纹，而11~14.5 kA电流范围内出现了A类LME裂纹。力学性能测试结果显示，在焊接电流6.8 kA时，接头抗剪强度为901~911 MPa，在焊接电流8.1 kA时，为738~783 MPa，抗剪力均达到21 kN以上，均满足标准要求。

Abstract

The resistance spot welding of DH980-GI steel sheet of body-in-white was taken as the research object. By means of optimization design of welding parameters and analysis of joint strength

hardness and liquid metal embrittlement (LME)

the influence of welding current and other parameters on the performance of resistance spot welding joint of steel sheet was studied. In the meantime

the brittleness sensitivity of spot welding liquid metal of the was also analyzed. The experimental results show that under the conditions of 4.5 kN electrode pressure and 380 ms welding time

the microhardness values of the fusion zone of the joints with different currents are similar

all within the range of 470~510 HV

and the fusion zone diameters meet the standard requirements. The LME test results show that no LME cracks were observed in the current range of 6.8~10.5 kA

while A-type LME cracks appeared in the current range of 11~14.5 kA. The mechanical properties test results show that when the welding current is 6.8 kA

the shear strength of the joint is 901~911 MPa

and when the welding current is 8.1 kA

it is 738~783 MPa. The shear force is above 21 kN

which meets the standard requirements.

关键词

DH980钢板电阻点焊焊接参数液态金属脆性力学性能

Keywords

body-in-whiteDH980resistance spot weldingwelding parameterliquid metal embrittleness

references

牛月鹏，张龙柱，杨西鹏，等.MS1300超高强钢点焊焊接工艺研究［J］.四川冶金，2021，43（1）：30-33.

NIU Y P，ZHANG L Z，YANG X P，et al. Study on spot welding process of MS1300 ultra high strength steel［J］. Sichuan Metallurgy，2021，43（1）：30-33.

王敏，杨海峰，刘兴毅.高强钢电阻点焊工艺研究［J］.电焊机，2023，53（11）：107-112.

WANG M， YANG H F， LIU X Y. Resistance Spot Welding Technology of High Strength Steel［J］. Electric Welding Machine， 2023， 53（11）： 107-112.

王亚东，韩丹，杨天一，等. 超高强冷轧双相钢DP980电阻点焊工艺研究［J］. 金属世界，2021（2）：44-47.

WANG Y D，HAN D，YANG T Y，et al. Research on Resistance Spot Welding Process of Ultra High Strength Cold Rolled Dual Phase Steel DP980［J］. Metal World，2021（2）：44-47.

点焊标准（11-59D 6770）［Z］.德国大众集团，2019.

白车身制造电阻点焊设计指南（VW01105-1）［Z］. 德国大众集团，2019.

KARAGOULIS M.Rapid LME test procedure for coated sheet steels［J/OL］. Auto/Steel Partnership，（2020-3-10）［2021-09-01］.

王恩茂，米振莉，卫志超，等. Q&P980镀锌高强钢电阻点焊工艺及液态金属脆化裂纹分布［J］. 材料工程，2023，51（1）：85-94.

WANG E M，MI Z L，WEI Z C，et al. Resistance spot welding process and liquid metal embrittlement crack distribution of Q&P980 galvanized high-strength steel　［J］.Journal of Materials Engineering，2023，51（1）：85-94.

丁凯，董武峰，王利，等. 先进镀锌高强钢中液态金属脆化的研究进展及挑战［J］. 钢铁研究学报，2022，34（5）：399-410.

DING K，DONG W F，WANG L，et al. Progress and challenge of liquid metal embrittlement in galvanized advanced high strength steel［J］. Journal of Iron and Steel Research，2022，34（5）：399-410.

谢永，王晓南，周相，等. 镀锌高强钢电阻点焊焊接接头液态金属脆化裂纹研究进展［J］. 机械工程学报，2023，59（2）：39-50.

XIE Y，WANG X N，ZHOU X，et al. Research Progress of Grain Boundary Liquid Metal Embrittlement Cracks in Galvanized Ultra-high Strength Automotive Steel Resistance Spot Welded Joints［J］. Journal of Mechanical Engineering，2023，59（2）：39-50.

LIN K C，LIN C S.Effect of silicon in dual phase steel onthe alloy reaction in continuous hot-dip galvanizing and galvannealing［J］.ISIJ International，2014，54（10）：2380-2384.

SCHEIBER D，PRABITZ K，ROMANER L，et al. The influence of alloying on Zn liquid metal embrittlement in steels［J］. Acta Materialia，2020，195：750-760.

HONG S H，KANG J H，KIM D，et al. Si effect on Zn-assisted liquid metal embrittlement in Zn-coated TWIP steels：Importance of Fe-Zn alloying reaction［J］. Surface and Coatings Technology，2020，393：125809-125819.

Alert me when the article has been cited

提交

暂无数据