In daily life, people always refer to steel and iron together as “اسٽيل”. It can be seen that steel and iron should be a kind of substance; in fact, from a scientific point of view, steel and iron have a little Different, their main components are all iron, but the amount of carbon contained is different. We usually call “pig iron” with a carbon content above 2%, ۽ “اسٽيل” with a carbon content below this value. ان ڪري, in the process of smelting iron and steel, iron-containing ore is first smelted into molten pig iron in a blast furnace (blast furnace), and then the molten pig iron is put into a steelmaking furnace to be refined into steel. ڇا خيال ڪيو وڃي scaffolding تعميراتي منصوبي ۾, اسٽيل (steel billet or strip) is used to make steel pipes, مثال طور, carbon steel billets can be made into steel pipes with hollow sections through hot rolling and cold rolling processes (carbon steel seamless tubes)
سيمينٽ اسٽيل ٽيوب جي پيداوار جي عمل کي بنيادي طور تي ٻن وڏن مرحلن ۾ ورهايو ويو آهي:
1. گرم رولنگ (extruded seamless اسٽيل ٽيوب): گول ٽيوب بلٽ → گرمائش → سوراخ ڪرڻ → ٽي رول ڪراس رولنگ, مسلسل رولنگ يا extrusion → اسٽريپنگ → sizing (يا گھٽائڻ) → کولنگ → سڌو ڪرڻ → هائيڊولڪ ٽيسٽ (يا نقص ڳولڻ) → نشان لڳائڻ → گودام
2. ٿڌي ٺهيل (ڦريل) seamless نديم ٽيوب: گول ٽيوب خالي → گرم ڪرڻ → سوراخ ڪرڻ → هيڊنگ → annealing → اچار → تيل ڀرڻ (ٽامي جي تختي)→ ملٽي پاس کولڊ ڊرائنگ (ٿڌي رولنگ)→ خالي ٽيوب → گرمي جو علاج → سڌي ڪرڻ → هائڊرو اسٽيٽ ٽيسٽ (نقص جي نشاندهي) → نشان لڳائڻ → اسٽوريج.
The raw materials needed for the production of iron and steel are divided into four categories and discussed separately: the first category discusses various iron-containing ore raw materials; the second category discusses coal and coke; The flux (or flux) of slag, such as limestone, وغيره; the last category is various auxiliary raw materials, such as scrap steel, آڪسيجن, وغيره.