There are a lot of equipment in the heat treatment plant. The furnaces probably include box furnaces, pit furnaces, and box furnaces. Many heat treatments can be processed here, such as the heating process of annealing, normalizing and quenching, and tempering. These common heat treatment.

Causes:

1) There is serious segregation of network carbide in the mold material.

2) There is mechanical processing or cold plastic deformation stress in the mold.

3) Improper heat treatment operation of the mold (too fast heating or cooling, improper selection of quenching cooling medium, too low cooling temperature, too long cooling time, etc.).

4) The mold has complex shape, uneven thickness, sharp corners and threaded holes, etc., which makes the thermal stress and tissue stress too large.

5) The mold quenching heating temperature is too high to cause overheating or overburning.

6) After the mold is quenched, the tempering is not timely or the tempering holding time is insufficient.

7) When the mold is repaired and quenched, it is reheated and quenched without intermediate annealing.

8) If the mold is heat treated, the grinding process is improper.

9) During the EDM process after heat treatment of the mold, there are high tensile stress and microcracks in the hardened layer.

Suzhou Wellhong Electric Co., Ltd. is a professional manufacturer of precision molds ， injection molding, assembling and silk-printing. Some moulds are exported to Japan, Europe and the United States. We have the right to import and export the goods. We can develop and manufacture the moulds according to the needs of our customers. mould company pay attention to quality control, new project development, personnel training, team spirit. In recent years, we have established long-term business relationships with many well-known enterprises at home and abroad.