(1) Matian scattered iron stainless steel: This type of stainless steel has a body-centered cubic structure (BCC) that can attract magnets and quickly cool it from the Ostian temperature. This has the best corrosion resistance, but the material is hard and brittle. Subsequent tempering can increase the ductility, but the corrosion resistance will decrease. Especially tempering between 450°C and 650°C will cause the carbon atoms in the crystal lattice gap to diffuse and precipitate and form a network of chromium carbide with chromium. Causes the consumption of chromium in the adjacent area to reduce the chromium content,Dongguan Precision CastingThe protective film cannot be formed and the corrosion resistance is lost, so special attention is required. The following is the heat treatment temperature of various Matian loose iron stainless steel materials.

(A) The temperature of 403, 410, 416se is 650-750℃.

(B) The temperature of 414 is 650-730℃.

(C) The temperature of 431 is in 6. (d) The temperature of 440-A, 440-B, 440-C, and the temperature of 420 is 680-750℃.

(2) Ferrous iron stainless steel: This type of stainless steel body-centered cubic structure (BCC) can attract magnets and is usually used in the automobile industry or the chemical industry. The strength will not be changed by heat treatment, but it can be cold-worked to increase the strength.

(3) Austian ferrous stainless steel: this kindDongguan Precision CastingStainless steel face-centered cubic structure (FCC) has no effect on magnets. As mentioned above, this type of material is easy to process, so after processing, the residual stress of the material can be eliminated and different heat treatments can be applied.

(4) Precipitation-hardened stainless steel: This type of stainless steel is heat-treated at low temperature after high temperature quenching. The aluminum or copper in the material precipitates along the slip surface of the differential row or the grain boundary to form compounds (inter-metalliccompounds). Its strength or hardness. Commonly used precipitation hardening stainless steel 17-4PH, there are other 17-7PH, PH15-7MO, AM-350, AM-355 and so on.

(5) Various typesDongguan Precision CastingHeat treatment of stainless steel after welding: After welding, the chromium element contained in stainless steel often diffuses and precipitates in the high temperature area (heat-affected zone) and combines with carbon to form chromium carbide. Corrosion such as perforation often occurs in these heat-affected zones, which can be remedied by the industry. After welding, the industry often heat-treats the object. Its effect can make the chromium in other areas diffuse into this chromium-deficient area to achieve a protective effect. .