SUS304 stainless steel belt _ _ stainless steel were issued

 To avoid grain growth during heat treatment and austenite phase transition, the heating temperature is not too high, the maximum heating temperature annealing is generally not more than 850 ° C. Ferritic stainless steel during the annealing process, must be shortened in the 370 ~ 550 ° C temperature range, the residence time, especially for high chromium ferritic stainless steel. If the material stays in this temperature range for too long, it is prone to 475 ° C embrittlement 304BA stainless steel, namely increased hardness, elongation dropped significantly, even to zero, while the material corrosion resistance is also lowered. Experiments show that: 27Cr steel after heating at 475 ° C for 100 hours at room temperature tensile strength increased by 50%, the yield strength increased by 150%, while the elongation rate is zero. Also poor weldability of the steel (HAZ coarse grains and brittle). (4) Cold Remedy: In the letter R, referred to as R process. The method is stainless steel processed by A, the first adjustment processing at high temperatures (about 950 ° C or so) 304 stainless steel with a 2B, only a small amount of carbide precipitation, cooling to room temperature, the organization is still austenite, in after - 78 ° C cold treatment to maintain a certain time, attainable relative T handle higher carbon martensite. (5) cold deformation process: the letter C, referred to as C treatment. A post-treatment by the austenite, as long as the appropriate composition control, plastic deformation or cold brushed stainless steel with 304 at room temperature, can also be induced martensitic transformation. To obtain a certain amount of martensite during cold rolling can be used in 60 percent of the amount of deformation; (6) the aging process: the letter H indicates, referred to as H treatment. This process is the final heat treatment of precipitation hardening stainless steel, the purpose is to use the aging effect and produce fine dispersed precipitates to obtain the highest possible strength and good mechanical properties. Usually based on the desired mechanical properties, especially strength, to select the heat treatment time and temperature. Aging time varies with steel and workpiece vary. Precipitation hardening aging process, but also to the decentralized aging, general multi-stage aging (referred to MH treatment), in order to achieve better results. SUS304 stainless steel belt _ _ stainless steel were issued by the Dongguan City Metal Materials Co., Ltd. issued a total offer. Dongguan total fat Metal Materials Co. (www.dggongfa.com) (www.dggongfa.com) strong, credible, and stainless steel products and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead a total of hair metal into the brilliant and you work for a better future!