How to Prevent Heat Deformation of Longitudinal Seam Pipe

Deformation sophisticated molds are often complex, but as long as we grasp its deformation law, the analysis of its causes, using different methods of prevention is to reduce the deformation of the mold, and it is able to control. In general, sophisticated molds heat deformation may take the following methods to prevent.

(1) A reasonable selection. Of sophisticated mold should choose a good micro deformation of steel material (such as air quenching steel), for carbide segregation serious mold steel should be reasonable and quenched forging heat treatment, larger and can not be solution forging die steels can double refined heat treatment.

(2) Die structure design should be reasonable, not too poor thickness, shape to symmetrical, to master molds for large deformation deformation law, set aside allowance for large, sophisticated molds can be combined structure.

(3) Sophisticated molds pre-heat treatment to eliminate residual stress generated during machining.

(4) A reasonable choice of heating temperature control heating rate, for sophisticated molds can be taken slowly heating, pre-heating and other heating balanced approach to reduce the mold heat deformation.

(5) Under the premise to ensure that mold hardness, maximize the use of pre-cooling, grading cooling quenching or austempering process.

(6) Sophisticated mold under conditions permit, as far as possible cryogenic vacuum heat treatment and quenching after quenching.

(7) For some sophisticated molds can be pre-heat treatment, aging heat treatment, quenching and nitriding heat treatment to control the accuracy of the mold.

(8) When repair mold trachoma, porosity, wear and other defects, the choice of cold welding and other small heat-affected patch repair equipment, to prevent deformation of the process.

In addition, the correct heat treatment process operations (such as plugging holes, tie holes, mechanical fixing, suitable heating method, the correct choice of the cooling direction and the direction of movement of the mold in the cooling medium, etc.) and a reasonable heat treatment process is also to reduce the sophisticated mold deformation and effective measures.