Jinhua Ningtai Metal Co., Ltd. is a professional manufacturer of metal sheet composite materials

There are many factors for the welding deformation of stainless steel clad plates. When the welding deformation is unavoidable or the deformation of the components exceeds the design requirements, it must be corrected. Stainless steel composite material manufacturers can divide the correction of ordinary welding deformation into cold working and hot working methods.

1. Cold working

The cold working method is also called the mechanical correction method. It uses the action of mechanical force to correct the welding deformation. It is generally suitable for small-sized weldments or weldments with a small degree of deformation. Commonly used devices include jacks, presses, and straightening machines. When correcting, first fix the weldment between the supports, and then apply a force opposite to the welding deformation direction to the component, so that the opposite plastic deformation occurs, and the original deformation can be compensated. The cold working method is not suitable for steel materials with high brittleness tendency.

2. Thermal processing

The hot working method is also called the flame rectification method, which uses the temperature of the flame to heat the steel locally, and when it cools, a new local deformation is generated, thereby offsetting the old deformation and achieving the purpose of rectification. Correct selection of heating position, temperature and cooling time can achieve a good correction effect. The higher the heating temperature, the stronger the correction ability, and the lower the heating temperature. Generally, it should be controlled between 600-800 °C, not exceeding 900 °C. Gas welding torches are often used for heating. The hot working method is suitable for low carbon steel structures and some ordinary low alloy steel structures.

Thermal processing is subdivided into three categories: point heating, linear heating, and triangular heating. Point heating is mainly suitable for correcting the concave and convex deformation of the sheet. In general, the larger the thickness of the steel plate, the larger the deformation, the more heating points, the larger the diameter and the smaller the spacing. There are three basic forms of linear heating: straight line, curve, and loop heating, which should be selected as appropriate for specific applications. Triangular heating is mainly used for bending deformation of wage steel beams and frame structures.