What is the reason why the film appears in the cutting piece

Release time:

2023-07-18

Since the cutting piece should have a certain cooling period at the end of hardening and heat preservation to meet the uniform release of stress; at this time, if the temperature of the furnace is too high or the temperature difference changes too much, the cooling changes of the grinding wheel will not be synchronized, so the deformation of the grinding wheel will appear. In fact, it is also a form of deformation.

What is the reason why the film appears in the cutting piece

cutting piece is widely used in our life with the characteristics of impact resistance, high tensile strength, bending resistance, etc. When using the cutting piece, the phenomenon of film will affect our normal use. What are the reasons for the emergence of film?
1, the furnace is discharged or discharged from the kiln too quickly or the temperature difference is too large
because the cutting piece should have a certain cooling period at the end of hardening and heat preservation to meet the uniform release of stress; At this time, if the temperature of the furnace is too high or the temperature difference changes too large, the cooling change of the grinding wheel will not be synchronized, so the deformation of the grinding wheel will appear. In fact, it is also a form of deformation.
2. Elimination of hardening and humid atmosphere for hardening furnaces
All hardening furnaces, whether box furnaces or tunnel kilns, must consider air intake and exhaust when designing furnaces. Due to the hardening process or the release of a large amount of waste gas (mainly only ammonia, water vapor), if these waste gas can not be discharged in time, it will be re-adsorbed by the pores in the cooling process, so it will cause the grinding wheel to smell and soft.
3, hardening stable low
hardening stable low means that due to the double influence of environment and raw materials, the hardening temperature should be provided in time when the seasons change or the temperature and humidity change obviously. High hardening stability means that the hardening curve has been adjusted, but when the stability is reduced and the weather is dry, the hardening stability is not lowered in time, which is also easy to cause cutting of the film.
4. The time of the hardening curve is short
This mainly means that under certain conditions, the low-temperature drying time of the hardening curve is short, and the heating rate in the heating stage is too fast.