In the heat treatment production process of automotive fasteners, the hardness is not enough in the whole work or large area. The reasons in the production process are analyzed,
There are the following points:
1. Under heating: the cause of under heating is that the heating temperature is too low or the holding time is insufficient
2. Overheating: the superheated austenite contains excessive carbon and alloy elements
3. Insufficient cooling rate: the cooling medium is not selected properly because of the insufficient cooling rate or the transformation of austenite and pearlite.
4. Improper operation: such as too short stay in water during double liquid quenching
Founded in 1984, Shanghai Oberoi automobile fastener factory is a professional manufacturer of automobile fasteners of several series and hundreds of products, such as automobile accessories, motorcycle accessories, various fasteners, stamping parts, etc. We pay attention to every detail and check the quality level by layer. Our idea is to do a good job in products and services, and develop together with supporting suppliers!
