مختلف حالتن جي مطابق, ڌاتوء وارو مواد هڪ مناسب درجه حرارت تي گرم ڪيو ويو آهي ۽ گرم رکيو, ۽ پوء هڪ ڌاتوء جي مواد جي ڌاتوء جوڙجڪ تبديل ڪرڻ لاء مختلف طريقن سان ٿڌو ڪيو ۽ گهربل اڏاوتن جي ملڪيت حاصل ڪرڻ. اهو عمل عام طور تي ڌاتوء جي مادي گرمي جو علاج سڏيو ويندو آهي. سيميڪل ٽيوب جي گرمي جي علاج ۾ ڪهڙا ٽي پروسيس شامل آهن?
Heat treatment of metal materials is divided into overall heat treatment, surface heat treatment and chemical heat treatment. The heat treatment of seamless steel tubes generally adopts the overall heat treatment.
Carbon steel seamless tubes need to undergo basic processes such as heating, heat preservation and cooling during heat treatment. In these processes, defects may occur in steel pipes. The heat treatment defects of seamless steel pipes mainly include unqualified structural properties of steel tubes, unqualified dimensions, surface cracks, اسٽيل پائپ جي مٿاڇري تي ڪجهه ننڍڙا خرابيون جهڙوڪ ننڍيون شگاف, severe oxidation, decarburization, overheating or overburning, وغيره.
The main three processes of heat treatment of seamless steel tube:
The first process of heat treatment of carbon steel seamless steel tube is heating. There are two different heating temperatures: one is heating below the critical point Ac1 or Ac3; the other is heating above the critical point Ac1 or Ac3. Under these two heating temperatures, the structural transformation of the steel pipe is completely different. The heating below the critical point Ac1 or AC3 is mainly to stabilize the structure of the steel and eliminate the internal stress of the steel tube; the heating above Ac1 or Ac3 is to austenitize the steel.
The second process of heat treatment of carbon steel seamless tube is heat preservation. Its purpose is to uniform the heating temperature of the steel pipe to obtain a reasonable heating structure.
The third process of heat treatment of carbon steel seamless tube is cooling. The cooling process is the key process of steel pipe heat treatment, which determines the metallographic structure and mechanical properties of the steel tube after cooling. In actual production, there are various cooling methods for steel tubes. Commonly used cooling methods include furnace cooling, air cooling, oil cooling, polymer cooling, water cooling, وغيره.