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

A heat-affected zone and welding process technology, applied in heat treatment process control, heat treatment furnace, heat treatment equipment, etc., can solve the problems that cannot dynamically reflect the structure shape, size and distribution, etc.

Active Publication Date: 2012-10-24
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the quantification of the microstructure evolution of the current weld, which is mainly based on empirical or semi-empirical deterministic models or analytical calculations, ...

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

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specific Embodiment approach 1

[0088] Specific implementation mode one: combine Figure 1 to Figure 5 To illustrate this embodiment, the simulation method of the microstructure evolution of the heat-affected zone in the welding process of the present invention is realized through the following steps:

[0089] Step 1: Calculate the temperature field in the heat-affected zone:

[0090] By solving the heat conduction differential equation, and attaching the initial conditions and heat transfer boundary conditions, the temperature distribution of the welding process is obtained:

[0091] Formula one: ρc ∂ T ∂ t = ∂ ∂ x ( λ ∂ T ∂ x ) + ∂ ...

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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 microstructure of welded joints, in particular to a method for simulating microstructure evolution in a heat-affected zone during welding. Background technique [0002] Grain growth, hardening embrittlement, aging softening or tempering softening, and brittle phase precipitation in the heat-affected zone of welding have always been weak links that lead to welding cracks or joint performance degradation. Therefore, the research on microstructure evolution of welding heat-affected zone has very realistic and important significance, among which numerical simulation is one of the most effective research methods. [0003] The microstructure simulation of welded joints is a huge research project involving spatial scales, time scales, and multi-physics fields. It is very difficult. The previous welding microstructure simulation work focused on the solidification structure and grain growth simulation. The resear...

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Application Information

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IPC IPC(8): G06F17/50C21D9/50C21D11/00
Inventor 魏艳红董志波宋奎晶郑文健马瑞占小红方坤张家铭
Owner HARBIN INST OF TECH
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