Stainless Steel Pipe Tube High temperature treatment
Stainless steel pipe in our lives plays a very important role, we all know that stainless steel has its unique wear resistance, good strength and superior corrosion resistance in our lives are widely used in chemical industry, video machinery, Mechanical and electrical industry, building and home improvement industry. Stainless steel tube produced something gives us a noble and gorgeous feeling.
Stainless steel pipe generally contains chromium, nickel, molybdenum, titanium and many other kinds of metal elements, there are common chrome stainless steel, austenitic stainless steel, martensitic stainless steel, stainless steel is generally no magnetic. Stainless steel in the process of processing, after the coil, Zhadai change, welding, high temperature treatment will produce black oxide. Generally with hydrofluoric acid and nitric acid corrosion method to remove, this approach serious environmental pollution, harmful to people, and gradually was eliminated. Now take sandblasting and chemical treatment of black scale. According to the complexity of stainless steel and user requirements can be mechanical polishing, chemical polishing, electrochemical polishing and other methods to achieve the gloss of the mirror in our stainless steel pipe sales process often encounter customers need to bend the stainless steel tube into their required arc. Customers want to buy our stainless steel tube for the elbow processing hope that we give him round the stainless steel tube thinner the better, we certainly can not by the customer's temper, need to recommend their appropriate thickness to bend round. The thickness of the stainless steel pipe on the elbow processing in the end what kind of impact? We usually see the stainless steel tube is straight, straight stainless steel tube bent into a bend, bending a good stainless steel pipe will have a radius and outer radius , Stainless steel tube in the corner when the outer radius of the side will be gradually stretched, the outer radius of the wall will become increasingly thin, stainless steel pipe surface to a certain extent, can not afford, it will crack The It is conceivable that the smaller the outer diameter of the stainless steel elbow, the greater the tensile strength of the outer radius, and the greater the thickness requirement. So to bend the stainless steel pipe is necessary to have a certain thickness requirements
Of course, the thickness of the requirements is not the thicker the better, if we give customers to bend when blindly asked customers to buy thick material that is irresponsible. Stainless steel bending processing department has been established for several years, and our curved round master has a wealth of experience, we bend the master in the customer orders when the round with their years of experience with the first consideration is to use the appropriate The thickness of the customer processing, and strive to do our use of stainless steel tube affordable, processed out of the product beautiful no time. Annealing treatment of stainless steel pipe is to heat the tube to 950 ~ 1050 ℃, after a period of insulation, so that carbide and all kinds of alloying elements dissolved in austenite, and then quickly quenched and cooled to obtain pure Heat treatment of martensite.
The main purpose of annealing the stainless steel tube is 3 points:
1, demagnetization: annealing treatment to make the steel pipe and the composition of uniform, so that the chemical composition of the distribution in the tube, so as to remove the cold after the tube with the magnetic.
2, reduce the hardness and improve toughness: the annealing process to restore the twisted lattice in the tube, broken grain re-crystallization, to eliminate internal stress, eliminate hardening, thereby reducing the hardness of the pipe to improve the toughness of the pipe to improve the processing performance of the pipe The
3, to improve corrosion resistance: due to cold processing caused by carbide precipitation, lattice defects, making stainless steel corrosion resistance decreased. After annealing, the corrosion resistance of stainless steel pipe can be restored to the best condition.