The failure of Chair Mould(FURNITUREMOULD) is mostly due to the important link of heat treatment. Failure caused by improper heat treatment generally accounts for more than 50% of the total failure of chair mould. In order to give full play to the potential performance of die steel, all die manufacturing dies should be quenched after mechanical processing. In heat treatment such as tempering, improper selection of process parameters such as heating temperature, holding time, cooling speed, etc. will become the failure factors of chair dies. If a finished chair mould loses its use value due to improper heat treatment, the economic and time losses will be great and various measures must be taken to prevent it. 1. Influence of heating speed Die steel contains more carbon and alloy elements and has poor thermal conductivity. Therefore, the heating speed in heat treatment (especially quenching) cannot be too fast and should be carried out slowly to prevent the mould from deforming and cracking. 2. Effects of oxidation and decarburization Mould quenching is carried out at a very high temperature. Without strict atmosphere control, oxidation and decarburization will easily occur on the surface of the mould. 3. Influence of quenching temperature The quenching temperature significantly affects various properties of the mould. The quenching temperature is too high, which is easy to cause growth and dissolve a large amount of carbide into the matrix, making the steel brittle. Therefore, accidents such as cracking, chipping and breaking often occur in the use of the mould. 4. Influence of cooling conditions Cooling conditions during quenching are also very important. For different mould materials, different cooling rates should be selected according to the required tissue state. 5. Effect of Annealing and Holding Time Cold-working dies made of carbon tool steel have many cracks on the end face of the dies and are scrapped in actual use. If you are interested in our products, you can click Furniture Mould to learn more information.
