Chongqing stainless steel processing Danieli eccentric control technology but also the use of appropriate materials, the use of prestressing techniques to minimize tensile deformation extruder column. Because the extrusion die to be subjected by the high temperatures and pressures, so the mold must be replaced after each squeeze homework. Pipe extrusion encounter the greatest problem is the internal and external dimensions of precision round different heart, a sector in which the amount of eccentricity in steel processing always arise. Good quality extrusion die, pipe size is strictly controlled machining accuracy and good surface quality indispensable prerequisite. Billet temperature trends will always appear on the screen in the manipulation of staff supervision. However, this elongation is automatically compensated by the control system in a timely manner by squeezing the lever position real-time adjustment of the way. Causes eccentricity may be either one of them, may also be the result of the combined effects of a variety of reasons. Extrusion die assembly, squeeze tube and squeeze lever is on the good, the real-time control system should be checked at every extrusion process; shaft position should be displayed on the screen to indicate that the device is working properly machinery state. The main objective of Chongqing stainless steel processing extrusion process is not arbitrary to production and processing of high precision, small size deviation of high quality steel products. Danieli's design is to ensure that during the extrusion process stainless steel trash can be reduced as much as possible, even fully compensate the impact of various factors eccentric. Stainless steel bar of a chemical identification coup, copper point test method - copper sulfate point test is quick to distinguish between ordinary carbon steel, and the easiest way of all types of stainless steel, copper sulfate solution used in concentrations of 5% -10% before conducting the test point stainless steel valves, test area should be thoroughly remove oil or other contaminants stainless steel, and with a grinding machine or Polishing cloth polishing a small area, and then try to polish droplets at the stainless steel screens, ordinary carbon steel or iron In a few seconds it will form a layer of metallic copper surface, while the surface of the stainless steel test point copper precipitation or not the display color of copper produced. 2, sulfuric acid test methods - sulfuric acid immersion 302 and 304 stainless steel can with 316 and 317 to distinguish. Trimming the sample to be finely ground, and then in a volume concentration of 20% to 30%, temperature 60 ~ 66 ℃ sulfuric acid cleaning and passivation of half an hour, the volume concentration of 10% sulfuric acid solution was heated to 71 ℃ when immersed in the solution 302 and 304, has been rapid corrosion of steel and produce large amounts of air bubbles in the sample black within minutes; and 316 and 317 samples of the steel from corrosion or erosion is very slow (no bubbles), test within 10 to 15 minutes does not change color. If the test sample simultaneously with a known composition to approximate comparison, the test can be more accurate. Stainless steel valves _ Chongqing Yao Yi Stainless Steel Products Co. (Certified) _ stainless steel supplied by Yao Yi Stainless Steel Products Co., Ltd., Chongqing. Stainless Steel Products Co., Ltd. Chongqing Yi Yao (www.shudumy.com) is Chongqing Municipality, stainless steel and products of leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Yao Yi leader in stainless steel with the staff warmly welcome all inquiries to discuss and create art Yiu stainless steel a better future.