Solid dissolve heat treatment and stability change processing

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Carbon has very big effect in the solubility in austenite stainless steel and temperature. Austenite stainless steel is in via 400 ℃ ～ inside the temperature limits of 850 ℃ (sensitize temperature area) when, can have tall chromic carbide (Cr23C6) separate out, fall when chromic content to corrosion resistance bounds under, deficient of existence crystal boundary is right now chromic, can corrode between generation brilliant, serious when can become powder. So the austenite stainless steel that the tendency corrodes between brilliant should undertake dissolve heat treatment or stability change processing originallying. Solid dissolve heat treatment: Heat austenite stainless steel to be controlled to 1100 ℃ , make carbide photograph dissolves all or basically, carbolic solid dissolve in austenite, cool quickly next to room temperature, make carbon achieves supersaturation status (carbon had been stabilized, form) of tall chromic carbide without ability and opportunity and chromium. Method of this kind of heat treatment is solid dissolve heat treatment. The fast refrigeration in solid dissolve heat treatment appears to resemble common steel quench, but right now ' quench ' with common steel quenching is different, former it is bate processing, latter is temper by dipping in water hard (form martensite) . Latter is those who obtain different hardness place to adopt to heat temperature is different also, but do not have 1100 ℃ . Stability changes processing: Form tall chromic carbide to avoid carbon and chromium, stability is joined to change an element in austenite steel (like Ti and Nb) , heating when temperature of 875 ℃ above, the carbide that can form stability (because Ti and Nb can be preferential,be united in wedlock with carbon, form TiC or NbC) , the chroma of carbon of dissolve of the solid in reducing austenite greatly (content) , removed sacrifice Ti and Nb to guarantee the end of Cr thereby. Change processing to compare the austenite stainless steel that has solid dissolve heat treatment via stability, have better integrated and mechanical performance. CNC Milling CNC Machining