Commonly used sintering atmosphere has a reducing atmosphere, vacuum, hydrogen atmosphere and so on. 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.
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