Manufacturing method for large-diameter thick-wall seamless zirconium pipe

一种大口径厚壁无缝锆管材的制造方法

Abstract

The invention discloses a manufacturing method for a large-diameter seamless zirconium pipe. The method comprises the steps as follows: secondary smelting is carried out by using a vacuum arc remelting furnace, so that a cast ingot are formed; twice firing forging and bar processing of the cast ingot are carried out, and then three-high cross piercing is carried out, so that a pipe billet is formed; the pipe billet after sand blasting and acid pickling is stretched and expanded, and every time the pipe billet is stretched and expanded, lubricating agent cleaning and recrystallization vacuum annealing treatment of the stretched and expanded pipe are carried out sequentially; furthermore, cold rolling is carried out for once or twice, so that the finished pipe is obtained; and finally, the finished pipe is deoiled and the vacuum annealing treatment of the deoilded pipe is carried out, and then acid pickling of the pipe is carried out, so that the large-diameter zirconium pipe is obtained. The thick-wall zirconium pipe manufactured with the method has excellent mechanical property, is mainly applied to the fields of pressure vessels, industrial pipelines, condensers, well drilling and the like in the petroleum industry, the chemical engineering industry, the marine industry and the like, and meets the requirements of anti-corrosion pipes.
本发明公开了大口径无缝锆管材的制造方法,该方法用真空自耗电弧炉二次熔炼成铸锭;将铸锭进行二火次锻造、棒材加工,然后用三辊斜轧穿孔制成管坯;用喷砂加酸洗后的管坯进行拉伸扩径,每进行一次拉伸扩径,对拉伸扩径后的管材依次进行润滑剂的清洗和再结晶真空退火处理;再经1~2次冷轧得到成品管材;最后将成品管材除油后进行真空退火处理,然后对管材酸洗处理得到大口径锆管。采用本发明方法制造的厚壁锆管力学性能优异,主要用作石油、化工、海洋等行业的压力容器、工业管道、冷凝器、钻井等领域,用于防腐管材的需求。

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Patent Citations (2)

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NO-Patent Citations (1)

    Title
    葛伟等: "锆无缝管材加工技术研究", 《现代冶金》

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