无缝异型管厂家管料热处理的主要目的是消除管料的内应力，调整管料的金相组织，降低硬度，增加塑料性，以改善其冷加工性能适应冷变形的需要。因为，有的热轧无缝异型钢管料由于终轧温度偏高和轧后冷却速度过大及冷却不一致，其组织和性能不均匀，内应力较大，硬度偏高，塑性偏低，冷加工性能较差。无缝异型钢管通过热处理以后，管料的硬度一般要求降到小于等于HB200。
The main purpose of heat treatment for seamless special-shaped steel pipe manufacturer is to eliminate the internal stress of the pipe, adjust the metallographic structure of the pipe, reduce the hardness and increase the plasticity, so as to improve its cold working performance to meet the needs of cold deformation. Because some hot-rolled pipes have uneven structure and properties, high internal stress, high hardness, low plasticity and poor cold working performance due to high finishing temperature, excessive cooling speed and inconsistent cooling after rolling. After heat treatment, the hardness of seamless special-shaped steel pipe is generally required to be less than or equal to HB200. 氧化铁皮中的氧化亚铁和氧化铁是碱性或两性偏碱性的氧化物。这些氧化物与硫酸和盐酸能发生化学反应。
Ferrous oxide and ferric oxide in iron oxide scale are alkaline or bisexual alkaline oxides. These oxides react chemically with sulfuric acid and hydrochloric acid.
由于碳钢和低合金钢表面的氧化铁皮比较疏松，有裂缝和孔隙，无缝异型钢管在酸洗时，酸通过裂缝和孔隙与铁基体接触，也会与铁产生化学反应。
Because the oxide scale on the surface of carbon steel and low alloy steel is loose, there are cracks and voids. When seamless special-shaped steel pipes are pickled, acid contacts with iron matrix through cracks and voids, and also reacts with iron.
