無縫異型管廠家管料熱處理的主要目的是消除管料的內(nèi)應(yīng)力，調(diào)整管料的金相組織，降低硬度，增加塑料性，以改善其冷加工性能適應(yīng)冷變形的需要。因?yàn)?，有的熱?a href="http://www.emudi.cn" title="無縫異型鋼管" target="_blank" class="sitelink">無縫異型鋼管料由于終軋溫度偏高和軋后冷卻速度過大及冷卻不一致，其組織和性能不均勻，內(nèi)應(yīng)力較大，硬度偏高，塑性偏低，冷加工性能較差。無縫異型鋼管通過熱處理以后，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. 氧化鐵皮中的氧化亞鐵和氧化鐵是堿性或兩性偏堿性的氧化物。這些氧化物與硫酸和鹽酸能發(fā)生化學(xué)反應(yīng)。

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.

由于碳鋼和低合金鋼表面的氧化鐵皮比較疏松，有裂縫和孔隙，無縫異型鋼管在酸洗時(shí)，酸通過裂縫和孔隙與鐵基體接觸，也會(huì)與鐵產(chǎn)生化學(xué)反應(yīng)。

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.