A full process method of laser welding based on icme

Abstract

The invention discloses an ICME-based laser welding process, which includes the following steps: a. Calculate the amount of deposition according to the shape of the groove and the number of welding layers to obtain the diameter of the welding wire and the wire feeding speed; b. According to the service conditions of the components, Calculate the phase diagram of the titanium alloy material database, welded joint performance and phase transformation behavior to obtain the welding wire composition; c. Establish a finite element model of the welding structure according to the wire feeding speed and welding wire composition, and select the laser welding heat source model to heat the TC4 titanium alloy laser welding The simulation of field and flow field calculates different welding parameters; d. Select the process parameter group according to the welding parameters; e. Carry out experimental verification according to the process parameter group to realize narrow gap laser welding of TC4 titanium alloy thin plate. It can accurately design process parameters such as the number of welding layers and grooves, which reduces the occurrence of defects such as thermal cracks in the welding process, improves the efficiency of process development, and saves costs.

Description

technical field [0001] The invention belongs to the technical field of laser welding, and in particular relates to an ICME-based full process method of laser welding. Background technique [0002] Integrated Computational Materials Engineering (Integrated Computational Materials Engineering, ICME) came into being. ICME is a new discipline proposed by the United States to develop new intelligent manufacturing technologies. It can effectively explore new materials, change the composition design and The manufacturing process is used to meet the needs of product design, the potential of new materials is explored as much as possible, and the manufacturing process is optimized to achieve the purpose of reducing costs, shortening the research and development cycle and reducing risks. As a traditional and complex manufacturing process, welding involves physical and chemical changes and internal phase transitions in the heating and cooling process, resulting in different room tempera...

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Problems solved by technology

[0003] At present, domestic research on titanium alloy laser welding is not deep enough, especially for large-scale and complex welding structures, welding process, welding conditions and other factors have a great influence on the distribution of post-weld deformation and residual stress of weldments

At the same time, in the welding process, if the welding parameters are not properly controlled, defects such as pores, cracks, and undercuts will easily occur, which will seriously affect the welding quality. It is a huge workload and consumes manpower and material resources to only rely on experiments to explore the optimal process parameters of hybrid welding.

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