Stainless steel pipe now more and more widely used, due to its good corrosion resistance has played a vital role in engineering construction, in the process of production we need a solid solution for stainless steel tube processing, the main purpose is to obtain certain martensite increase the hardness of products.
after solution treatment and then heated to (760±15) ℃ for 90min, the carbon and alloying element content in the 904L stainless steel tube was reduced due to the precipitation of Cr23C6 carbides .The Ms point was raised to 70℃ and then cooled to room temperature to obtain martensite +α ferrite + residual structure. The residual austenite was decomposed after aging at 510℃. after solution by high temperature adjustment and cryogenic treatment, the solution is heated to 950℃ for 90min. Due to the increase of Ms point, a small amount of martensite can be obtained by cooling to room temperature. A certain amount of martensite can be obtained after cold treatment at -70℃ for 8h.
After solution treatment by cold deformation method, the amount of martensite formed by 904L seamless tube during cold deformation is related to deformation and composition of 904L stainless steel tube.
The above three methods are commonly used for solution treatment of stainless steel tubes.
Now we will simply understand the surface inspection method of stainless steel pipe.
The use of stainless steel pipe or more use of time after a long time, is the need to check it this is a very key step, in order to ensure the quality of stainless steel pipe safety so in the detection of time must ensure the quality of pipe. Here we will simply understand the surface inspection method of stainless steel pipe.
If there are sundries on the surface of stainless steel tube, especially when there is dust adhesion, heating will of course affect the oxide scale.
The surface of the workpiece such as cold processing attached lubricating oil, in trichloroethylene degreaser, caustic soda solution fully degreased after cleaning with warm water and then heat treatment.
The difference of the atmosphere in the stainless steel tube furnace in different parts of the furnace atmosphere, the formation of the oxide scale will also change, which is also the cause of the uneven pickling. So the atmosphere in all parts of the furnace is the same during heating.
The object in direct contact with the heating workpiece can only be used after fully drying. But after drying such as placed at room temperature, in the case of high humidity moisture will still condense on the surface of the workpiece. So dry it before use.
Forging process of stainless steel plateStainless steel plate is used more in our life, and its processing industry is also more diverse, mainly including cold rolling, calcined and hot rolling, etc. Today, we will introduce the calcined stainless steel plate process:- Steel Testing StandardsSteel products: heavy rail, light rail, large section steel, medium section steel, small section steel, steel cold-formed section steel, high-quality section steel, wire rod, medium and thick steel plate, thin steel plate, silicon steel sheet for electrical purposes, strip steel, seamless steel pipe steel, welded steel pipe, Steel pipes, metal products and other varieties.
- Cold Rolling Line and Hot Rolling LineThe 1380mm cold rolling production line with capacity of 600,000 tons, can produce the plate in specifications of 0.12-1.2mm*800-1250mm. The production line adopts advanced all hydraulic adjustment system ,leading to flexible control and stablequality. In addition,the line adopts thickness gauge to realize AGC plate thickness automatic conetrol in order to ensure quality. Cold rolled coil has excellent shape,good surface quality,high surface smoothness,It is easy to be coated and has different varieties,Cold-rolled coil is widely used in galvanizing ,household appliances, Cooper making,automotive,construction industry and enamel industry.
Production process and classification of aluminum ingotsThe production of aluminum ingots is composed of bauxite mining, alumina production, aluminum electrolysis and other production links.
The bauxite is mined first, and the aluminum ore powder is produced through processes such as washing and grinding, and then alumina is obtained through four complicated processes such as roasting.- What are Aluminum Coils ？Before we go into the uses of aluminum coil, it is important to understand what it is. An aluminum coil is a piece of aluminum roll, as opposed to a flat sheet. It has a hollow cylindrical core that is wound around the coiled material. This allows the inner diameter of the coil to be formed. Coils can be pre painted, diamond-coated, heat-treated, and non-heat treated. Here will talking uses of aluminum coils.
Chat Online