研究目的
To investigate the effect of Al-Si coating on fiber laser welded 22MnB5 steel, specifically the effect of microstructure evolution on mechanical properties including tensile, fatigue and Erichsen cupping tests of de-coated and coated joints.
研究成果
Al-Si coating introduces ferrite in the fusion zone, reducing microhardness but improving fatigue properties due to better plastic deformation capacity. Tensile properties remain unaffected as failure occurs in the base metal. Erichsen tests show a decrease in anti-deformation capacity. The coating's effect varies with test conditions, highlighting the need for comprehensive mechanical property evaluation in welded joints.
研究不足
The study focuses on as-received 22MnB5 steel; the hot stamping process may lead to larger microstructure variations in welded joints, which is not covered here. The dual-beam laser welding improved homogeneity but did not fully eliminate ferrite formation in coated joints. The Erichsen tests showed reduced anti-deformation capacity in coated joints, indicating limitations in multiaxial load conditions.
1：Experimental Design and Method Selection:
Fiber laser welding of as-received 22MnB5 steel with Al-10wt.%Si coating in butt configuration was performed using an IPG YLS-6000 fiber laser system with a collateral dual-beam module. The ratio of dual-beam energy was set as 1:
2：Pure argon gas was used for shielding. Sample Selection and Data Sources:
Cold-rolled Al-10wt.%Si coated 22MnB5 steel sheets with thickness of
3：5 mm were selected. Chemical composition of the steel is provided. Samples were cleaned by acetone before welding and assembled in a butt-joint configuration tightly without any gaps. List of Experimental Equipment and Materials:
IPG YLS-6000 fiber laser system, optical microscopy (OM), scanning electron microscope (SEM) with EDS, electron back-scattered diffractometer (EBSD), Vickers microhardness tester, universal mechanical INSTRON machine for tensile tests, high frequency fatigue test machine, Erichsen cupping test equipment. Materials: 22MnB5 steel sheets, Al-10wt.%Si coating, acetone, 4% nital solution, pure argon gas.
4：Experimental Procedures and Operational Workflow:
Laser welding with fixed parameters (laser power 4 kW, welding speed 2 m/min, defocusing distance 0 mm, gas flow 15 L/min). Post-welding, specimens were cut, mounted, grounded, polished, and etched for microstructure observation. Microhardness tests with 500 gm load and 15 s dwell time. Tensile tests with strain rate of
5：01 s?1. Fatigue tests with stress ratio R=1 and sinusoidal waveform. Erichsen cupping tests with blank holder force of 10 kN and punch speed of 2 mm/min. Data Analysis Methods:
Microstructure analysis using OM, SEM, EBSD with TSL OIM software. Microhardness profiling. Tensile stress-strain curves. Fatigue S-N curves fitted by Basquin equation. Erichsen load-displacement curves.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Fiber laser system
YLS-6000
IPG
Used for laser welding of 22MnB5 steel sheets in butt configuration.
立即获取同款设备 -
Optical microscopy
Used for observing cross sections and microstructures of welded joints.
暂无现货
预约到货通知
-
Scanning electron microscope
Equipped with EDS for microstructure analysis and element distribution.
暂无现货
预约到货通知
-
Electron back-scattered diffractometer
Used for EBSD analysis to study microstructure and crystallographic orientations.
暂无现货
预约到货通知
-
Vickers microhardness tester
Used for microhardness tests across welded joints.
暂无现货
预约到货通知
-
Universal mechanical machine
INSTRON
Used for tensile tests of welded joints.
暂无现货
预约到货通知
-
High frequency fatigue test machine
Used for fatigue tests of welded joints.
暂无现货
预约到货通知
-
Erichsen cupping test equipment
Used for Erichsen cupping tests to evaluate formability.
暂无现货
预约到货通知
-
登录查看剩余6件设备及参数对照表
查看全部
