Simulation method of texture evolvement of heat affected zone in welding process

Abstract

The invention discloses a simulation method of texture evolvement of a heat affected zone in a welding process, relating to a fine texture simulation method of a welding connector and aiming at solving the problems that the quantification of the present fine texture evolvement of a weld joint is mainly based on an experiential or half experiential deterministic model or analysis calculation, and only the texture content is calculated but the state, the size and the distribution of the texture cannot be reflected dynamically. The method comprises the following steps: step 1, calculating the temperature fields of the heat affected zone; step 2, calculating the crystalline grain growth process of crystalline grains at different positions above a beta phase zone according to the distribution of the temperature fields; and step 3, calculating continuous cooling solid state phase change according to the cooling velocity and the beta phase crystalline grain distribution calculation result obtained through the temperature field calculation. The simulation method is used for the fine texture simulation of the welding connector.

Description

Technical field

[0001] The invention relates to a method for simulating the microstructure of a welded joint, in particular to a method for simulating the evolution of the structure of the heat-affected zone in the welding process. Background technique

[0002] The problems of grain growth, hardening embrittlement, aging softening or tempering softening, and brittle phase precipitation in the welding heat-affected zone have always been weak links that lead to weld cracks or joint performance degradation. Therefore, the research on the microstructure evolution of welding heat-affected zone has very realistic and important significance. Among them, numerical simulation is one of the most effective research methods.

[0003] Microstructure simulation of welded joints is a huge research project involving space scale, time scale, and multiphysics. It is very difficult. The previous welding microstructure simulation work focused on solidification structure and grain growth simulation, an...

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