High pressure water jet cutting (professional water cutting: Shanghai Xinwei)
Cold rolled steel strip for deep drawing is a low-carbon high-quality carbon structural steel cold-rolled steel strip for deep drawing complex drawing parts.
.The product quality advantages of continuous casting billet of stainless steel pipe fittings are mainly reflected in that the non grinding rate of the outer surface of the billet except the head and tail section has reached more than 70%, and the total surface grinding yield has reached 915%. In order to achieve this goal, it is necessary to refine the molten steel, achieve low oxygen and sulfur content, do a good job in the metallurgy of the ladle and tundish, accurately determine the molten steel temperature, and realize no oxidation casting, Further reduce the inclusion content.
This kind of steel pipe can be divided into stainless steel seamless steel pipe and stainless steel welded steel pipe (slotted pipe). According to different manufacturing processes it can be divided into several basic types: hot rolling, cold drawing and cold rolling. According to the section shape, it can be divided into circular pipe and special-shaped pipe. Circular steel pipe is widely used, but there are also some square, rectangular, semicircular, hexagonal, equilateral triangle Octagonal and other special-shaped stainless steel pipes.
.Process performance inspection: flattening test, tensile test, impact test flaring test, hardness test, metallographic test, bending test and nondestructive testing (including eddy current testing, X-ray testing and ultrasonic testing).
Corrosion resistance most stainless steel products require good corrosion resistance. Stainless steel pipe is similar to class I and II tableware, kitchen, water heater, water dispenser, etc. Some foreign businessmen also test the corrosion resistance of products: use NaCl aqueous solution to warm to boiling. After a period of time, wash and dry, and determine the weight loss to determine the degree of corrosion.
Seamless steel pipe belongs to the category with relatively high added value among steel pipe products, and the products involved in this case belong to the medium and high-end products of stainless steel pipe. According to incomplete statistics, in 2010, China exported about 20000 tons of stainless steel pipes to the EU, accounting for about 13% of the total exports of stainless steel pipes that year.
Production mode stainless steel pipe can be divided into seamless pipe and welded pipe according to the production mode. Seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe,06Cr13 stainless steel plate, cold drawn pipe and pipe. Cold drawing and cold rolling are the secondary processing of steel pipe; Welded pipe is divided into straight seam welded pipe and spiral welded pipe.
If packing is not required, phosphoric acid, and the biochemical reaction time between oxygen and fresh metal is longer than that of oxygen, about 0.015 seconds which leads to high temperature air When the low cycle fatigue test is carried out in the gas environment, the oxygen content at the fatigue crack tip of the stainless steel pipe sample is always saturated, and the excess oxygen can diffuse to the base, resulting in the weakening of the bonding of the base metal atoms, increasing the embrittlement tendency of the material, and accelerating the expansion and growth of the crack. At the same time of low cycle fatigue, high temperature will also cause creep deformation of the stainless steel pipe High temperature provides additional energy for the accelerated diffusion of atoms. When there are defects in the material, such as holes, voids, etc., the atomic diffusion becomes easy, and with the progress of low cycle fatigue, dislocations will be generated in the material. Under the action of stress, the slip and climb of dislocations interact with point defects to promote the aggregation of micropores and form large holes, such as holes and voids
2B cold rolling shall be subject to heat treatment, pickling or similar treatment, and then leveled to obtain appropriate gloss.
In addition to stress corrosion resistance, professional stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe have stable, safe and reliable performance and can be maintenance free. The technical level has reached the domestic level and the advanced level of similar international products. Other local corrosion resistance properties are better than ferritic stainless steel.
average method.The cold working process performance and cold forming performance are much better than that of ferritic stainless steel.
For business people,12 stainless steel coil, of course, it is better to spend less under feasible conditions. For goods such as stainless steel pipes,Environmental protection stainless steel belt, we can often see that there will be packaging film bags on them. Although they are not heavy, if there are a large number of single purchases, they will also produce certain economic expenses, but why do many people clearly dislike this thing on stainless steel pipes, But I have to accept it. Next, xincoral Xiaobian will tell you why stainless steel pipes need packaging bags.
D-outer diameter (mm) as stainless steel pipe for reprocessing device, in order to reduce carbon content by vigorously welding chromium carbon compounds at affected parts, in order to improve the corrosion resistance of ULC steel, the steel industry with phosphorus content below 0.015% is manufactured. After 20 times of 65% boiling corrosion test, it is found that if the corrosion degree of the solution treated material is less than 0.1mm/a, 650 ℃ & times; The sensitized material for 2h has excellent corrosivity when the corrosion degree is less than 0.2mm/a.
. 409— Cheap model (British and American), usually used as automobile exhaust pipe, products and tens of millions of products are up to you to choose. Professional stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe are safe and secure. They are usually also called 17-17% Cr and 4% Ni.