Method for producing seamless titanium and titanium alloy welded pipe

A production method and technology of welded pipes, which are applied in the field of production of seamless titanium and titanium alloy welded pipes, can solve the problems of coarse grains, different metals, and inapplicability to occasions with high environmental requirements, and achieve high yield and high yield. The effect of high production efficiency and significant cost advantages

Active Publication Date: 2012-07-18
张家港华裕有色金属材料有限公司
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Problems solved by technology

The weld seam and its heat-affected zone of the welded pipe are in the cast state, with coarse grains, which are different from the base metal. The welded pipe can meet v

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  • Method for producing seamless titanium and titanium alloy welded pipe
  • Method for producing seamless titanium and titanium alloy welded pipe
  • Method for producing seamless titanium and titanium alloy welded pipe

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[0029] The main idea of ​​the method for producing titanium and titanium alloy pipes of the present invention is as follows: firstly, the welding pipe material step is completed with high quality on a precision automatic welding production line to obtain a welded pipe of titanium or titanium alloy, and then the welded pipe is further cold-rolled one or more times. - Heat treatment processing, so that the as-cast coarse grains of the weld seam of the welded pipe and its heat-affected zone are broken and refined, which is no different from the matrix structure, so as to achieve a seamless effect and meet the needs of the project. In addition, by adopting the method of the present invention, the welded pipe can be cold-rolled to ultra-thin wall, ultra-high diameter-thickness ratio (diameter-thickness ratio=outer diameter / wall thickness) titanium pipe such as φ25×0.3×8000mm, φ25.3×0.15×6000mm, etc. .

[0030] The present invention will be described in further detail below with...

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Abstract

The invention relates to a method for producing a seamless titanium and titanium alloy welded pipe. By the method, the welded pipe is obtained by welding a pipe material on an automatic precise welded pipe production line; and particularly, the production method comprising the step of performing one-time or repeated cold rolling-thermal treatment on the welded pipe. The cold rolling-thermal treatment process comprises the following steps of: (1) cold-rolling the welded pipe by using a multi-roller pipe milling machine, and lubricating the inner and outer surfaces of the pipe material in the cold rolling process, wherein the total machining rate of a cold-rolling finished product is controlled to 50 to 70 percent, the machining rate in all processes is controlled to 15 to 50 percent, and a cold rolling process is performed for 2 to 3 times; (2) after the cold rolling process, degreasing the pipe material, and cleaning; and (3) annealing the degreased and cleaned pipe material in a vacuum annealing furnace. By the method, the seamless welded pipe can be obtained; and the method is high in production efficiency, low in cost and light in environmental pollution.

Description

technical field [0001] The invention relates to a production method of a titanium and titanium alloy welded pipe, in particular, the method can realize the seamless effect of the welded pipe. Background technique [0002] Titanium and titanium alloy pipes mainly include welded pipes and seamless pipes. The processing technology of seamless pipes is complex, requires multiple repetitions, low yield, long production cycle, low production efficiency, large floor area, many operators, degreasing and pickling will pollute the environment, and the number of vacuum heat treatments is high. The consumption is high, and continuous production is not possible, especially the production of thin-walled and super-long pipes is difficult and the cost is high. Seamless pipes are suitable for high-temperature, high-pressure, corrosive environments and other occasions with high requirements. [0003] At present, the production method of welded pipe is generally cold-rolled titanium strip ex...

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Application Information

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IPC IPC(8): B21C37/08
Inventor 路开路金林
Owner 张家港华裕有色金属材料有限公司
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