What are the factors affecting the quality of Stainless Steel Sintered Filter Element:
1, The sintering temperature and time:
The sintering temperature and the length of the length of the sintered body of the porosity, density, strength and hardness. Sintering temperature is too high and too long, will reduce product performance, and even products over burned defects; sintering temperature is too low or too short, the stainless steel sintered filter element will be due to undercurrent caused by performance degradation.
2, The sintering atmosphere:
Powder metallurgy commonly used sintering atmosphere to restore the atmosphere, vacuum, hydrogen atmosphere. The sintering atmosphere also directly affects the properties of the sintered body. Sintering in a reducing atmosphere prevents billet burning and reduces surface oxide. Such as iron-based, copper-based products often used furnace gas or decomposition of ammonia, hard alloy, stainless steel often used pure hydrogen. Active metal or refractory metal (such as beryllium, titanium, zirconium, tantalum), TiC-containing cemented carbide and stainless steel can be vacuum sintering. Vacuum sintering can avoid the adverse effects of harmful components (H2O, O2, H2) in the atmosphere, but also reduce the sintering temperature (generally can reduce 100 ~ 150 ℃).