ZatetzBenxi 304 stainless steel plateSelection principles and applicable occasions

Application: utility boiler industry, mainly in key parts such as high temperature section of superheater and reheater.The surface resistance is less than mb; Wear protection; Scalable; Excellent chemical resistance; Good alkali metal and acid resistance; Strong toughness; Flame retardant.Zatetz,The width of coiled material is variable, including mm.mm.mm.mm.mm.mm, etc. it can also be divided according to customer requirementsStainless steel has two classifications: one is divided into chromium stainless steel and chromium nickel stainless steel according to the characteristics of alloy elements; The other is divided into m stainless steel, f stainless steel, a stainless steel and A-F duplex stainless steel according to the microstructure of steel in normalized state.Sesto San Giovanni,The operators are mainly plumbers and argon arc welders, with the cooperation of other types of work, and the argon arc welder shall have the certificate issued by relevant departments.When using this process, the following key points should be paid attention to: during the welding process, the correct included angle between the welding handle, welding wire and weldment should be maintained. The ideal caster angle of the welding handle nozzle is & deg; & mdash; & deg;, and the included angle between the welding wire and the weldment surface is & deg; & mdash; & deg;; correct the molten pool temperature, so as to ensure Beautiful weld formation (uniform width etc. to change the molten pool temperature change the welding speed, no concave, convex and other defects) During operation, the current shall be slightly larger than that of solid core welding wire, and the welding handle shall be slightly adjusted to accelerate the separation of molten iron and molten flux coating, so as to facilitate the observation of molten pool and penetration; when filling the welding wire, it shall be sent to places of molten pool and pressed inward slightly to ensure penetration and prevent concave; during welding, the welding wire shall be regularly sent and taken out, and the welding wire shall always be ensured Under the protection of argon to prevent the end of the welding wire from being oxidized and affect the welding quality; pay attention to the welding quality of the arc and arc stop, and the spot weld shall be polished to & deg; the slope shall be gentle, and pay attention to the defects such as arc pit and shrinkage hole during arc stop.W = (outer diameter wall thickness) & times; wall thickness & times; . = KGM (weight per meter).

Section shape stainless steel pipe can be divided into round pipe and special-shaped pipe according to the section shape. Special shaped tubes include rectangular tubes, rhombic tubes, elliptical tubes, hexagonal tubes, octagonal tubes and various cross-section asymmetric tubes. Special shaped pipe is widely used in various structural parts, tools and mechanical parts. Compared with circular pipe, special-shaped pipe generally has large moment of inertia and section modulus, and has large bending and torsion resistance, which can greatly reduce the structural weight and save steel.Han Jianbiao, an analyst at Zoomlion steel, pointed out that since, China's steel pipe exports have been only or tons per month,The scale pretreatment of stainless steel pipe makes the scale loose, and then acid pickling is carried out for easy removal. The pretreatment can be divided into the following: alkaline salt melting treatment method. The alkaline melt contains % hydroxide and % salt. The proportion of the two in the molten salt shall be strict, low melting point and small viscosity. Only the sodium halo shall be analyzed in the production process, and the content shall not be less than % (wt) It is treated in a salt bath furnace at ~ ℃ for minutes for ferritic stainless steel and minutes for austenitic stainless steel. Similarly iron oxides and spinels can also be oxidized by salt to become loose ferric oxide, which is easy to be removed during acid pickling. Due to the action of high temperature, some of the formed oxides peel off and sink to the furnace bottom in the form of sediment. Alkaline salt melting pretreatment Process flow: steam degreasing → preheating ( ~ ℃, time ~ min) ↠ molten salt treatment & rarr; water quenching & rarr; hot water washing. Molten salt treatment is not suitable for assemblies with weld gap or crimping. When the parts are taken out of the molten salt furnace, a stream of alkali and salt mist will be splashed during water quenching, so deep well anti splash water quenching tank shall be used during water quenching. During water quenching, firstly lift the parts basket into the tank, stop above the horizontal plane, close the tank cover, and then lower the parts basket into the water, Professional L stainless steel pipe, s stainless steel pipe and L stainless steel pipe are stable, safe,ZatetzStainless steel conduit, reliable and maintenance free. The technical level has reached the domestic level and the international advanced level of similar products until submerged. & mdash; high strength cutting tool steel, with slightly higher carbon content, can obtain higher yield strength after appropriate heat treatment, and the hardness can reach hrc. It is one of the hard stainless steels. A common application example is & ldquo; shaving blade & rdquo;. There are three common models: C and f (easy processing type).Hardness stainless steel pipes are usually measured by Brinell, Rockwell and Vickers hardness indexes.

. Raw material problem of stainless steel pipe. If the hardness is too low, it is not easy to polish (BQ is not good). If the hardness is too low, orange peel is easy to appear on the surface during deep drawing, which affects BQ performance. BQ with high hardness is relatively good.quality index Series & mdash; Martensitic precipitation hardening stainless steel.From the perspective of metallography, because stainless steel contains chromium, a very thin chromium film is formed on the surface, which is separated from the corrosion resistance of oxygen invaded in the steel.The American Iron and Steel Institute uses three digits to identify various standard grades of malleable stainless steel. Among them, austenitic stainless steel is marked with numbers of and series. For example, some ordinary austenitic stainless steel is marked with and.Zatetz,Stop the written technical disclosure, on-site technical and safety disclosure to the on-site operators.Model & mdash& ldquo; Cutting tool level & rdquo; Martensitic steel, an early stainless steel similar to Brinell high chromium steel. It is also used for surgical tools,Zatetz410 stainless steel with magnetic,ZatetzStainless steel heat exchanger tube, which can be made very bright. Model & mdash; Ferritic stainless steel for decoration, such as automotive accessories. Good formability, but poor temperature resistance and corrosion resistance.Good ductility, used for forming products. It can also be machined to harden rapidly. Good weldability. Wear resistance and fatigue strength are better than stainless steel.