Hot cracking during laser welding of steel: Influence of the welding parameters and prevention of cracks

被引：5
|
作者：
Schaefer, Marcel [1 ]
Kessler, Steffen [2 ]
Scheible, Philipp [3 ]
Speker, Nicolai [3 ]
Harrer, Thomas [3 ]
机构：
[1] TRUMPF GmbH Co KG, Johann Maus Str 2, D-71254 Ditzingen, Germany
[2] TRUMPF Werkzeugmaschinen GmbH Co KG, Johann Maus Str 2, Ditzingen, Germany
[3] TRUMPF Laser & Syst Tech GmbH, Johann Maus Str 2, Ditzingen, Germany
来源：
HIGH-POWER LASER MATERIALS PROCESSING: APPLICATIONS, DIAGNOSTICS, AND SYSTEMS VI | 2017年 / 10097卷
关键词：
laser welding; steel alloys; hot cracks; line energy; CO2; laser; solid state laser;
D O I：
10.1117/12.2254424
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In continuous wave keyhole-mode laser welding of high strength steel alloys hot cracking can occur. The hot crack susceptibility depends on the mutual interaction of several factors like the welding parameters, the alloy composition and the weld fixturing. In this paper we focus on the influence of the welding parameters and investigate the dependency of the laser power, the welding speed and the laser wavelength on the crack formation. X-ray images are used to visualize the hot crack patterns, which exhibit a pronounced periodicity. To influence the hot crack formation, the incident energy input into the process was adapted. For specific welding parameters, we show exemplarily the prevention of hot cracking by the use of a twin-spot optics.
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页数：8
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