In order to analyze the influence of the distance between heat sources(D_(LA))on the welding process,the effects of D_(LA)on the droplet transfer behavior,weld formation characteristics and weld formation mechanism of...In order to analyze the influence of the distance between heat sources(D_(LA))on the welding process,the effects of D_(LA)on the droplet transfer behavior,weld formation characteristics and weld formation mechanism of AH36 in laser and cable-type welding wire gas metal arc welding arc hybrid welding were studied.Real-time photography was conducted using a high-speed camera to determine the droplet transfer and arc behaviors;the surface morphology and macroscopic cross-section of the weld obtained from the experiment were observed and analyzed.The arc height decreases with the increase in the DLA,the arc width shows the opposite change,and the welding current decreases.The allure of the laser to the arc increases with the increase in the D_(LA).The frequency of droplet transfer increases with the increase in the D_(LA),but the growth rate decreases.The continuous increase in the D_(LA)leads to the tendency of the droplet size to decrease first and then increase,and the minimum value is obtained when the D_(LA)is 4 mm.The D_(LA)has obvious influence on the weld formation.The weld penetration and reinforcement change similarly,increasing first and then decreasing as the D_(LA)increases,and the laser area of the weld also increases first and then decreases.展开更多
基金This work is supported by the National Natural Science Foundation of China(Grant No.51905231)China Postdoctoral Science Foundation(Grant No.2020M670943)Graduate Student Scientific Research Innovation Projects in Jiangsu Province(Grant No.KYCX22_3788).
文摘In order to analyze the influence of the distance between heat sources(D_(LA))on the welding process,the effects of D_(LA)on the droplet transfer behavior,weld formation characteristics and weld formation mechanism of AH36 in laser and cable-type welding wire gas metal arc welding arc hybrid welding were studied.Real-time photography was conducted using a high-speed camera to determine the droplet transfer and arc behaviors;the surface morphology and macroscopic cross-section of the weld obtained from the experiment were observed and analyzed.The arc height decreases with the increase in the DLA,the arc width shows the opposite change,and the welding current decreases.The allure of the laser to the arc increases with the increase in the D_(LA).The frequency of droplet transfer increases with the increase in the D_(LA),but the growth rate decreases.The continuous increase in the D_(LA)leads to the tendency of the droplet size to decrease first and then increase,and the minimum value is obtained when the D_(LA)is 4 mm.The D_(LA)has obvious influence on the weld formation.The weld penetration and reinforcement change similarly,increasing first and then decreasing as the D_(LA)increases,and the laser area of the weld also increases first and then decreases.
