Machining method for improving ultrasonic flaw detection qualification rate of titanium alloy super-long seamless pipe

A technology for seamless pipes and processing methods, which is applied in the field of processing to improve the pass rate of titanium alloy ultra-long seamless pipes for ultrasonic flaw detection, can solve the problems of waste of raw materials, unqualified pipes, high production costs and material costs, etc., and achieve The effect of reducing labor intensity, processing difficulty and cost, and high pass rate of ultrasonic flaw detection

Active Publication Date: 2022-03-18
西安西部新锆科技股份有限公司
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Problems solved by technology

Under this process, the qualified rate of ultrasonic flaw detection of titanium pipes can reach about 70%, that is to say, at least 30% of the pipes are unqualified, resulting in waste of raw materials, resulting in high production costs and material costs

Method used

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  • Machining method for improving ultrasonic flaw detection qualification rate of titanium alloy super-long seamless pipe
  • Machining method for improving ultrasonic flaw detection qualification rate of titanium alloy super-long seamless pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 The tube blank pre-preparation process includes tube blank pre-rolling, inner surface boring and outer surface turning, wherein the billet rolling is carried out by a two-roller tube mill, and the deformation is 62.50%, and the tube blank pre-rolling is carried out by three It is carried out in a roll tube mill, the rolling pass is one pass, and the deformation is 15.56%, and the outer surface turning is carried out by a centerless lathe.

[0029]At the same time, for the titanium alloy ultra-long seamless pipe of the same specification, in embodiment 1, the weight loss of titanium alloy produced by pre-rolling, inner surface boring and outer surface turning process is included in the billet weight in the process design. When designing the specifications of the extruded tube blank, the wall thickness removal amount of the inner surface boring and outer surface turning is included in the outer diameter, inner diameter and wall thickness of the extruded tube blan...

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Abstract

The invention discloses a processing method for improving the ultrasonic flaw detection qualification rate of a titanium alloy super-long seamless pipe, a pipe blank pre-preparation process is carried out before cogging rolling in a titanium alloy pipe preparation process, and the pipe blank pre-preparation process comprises pipe blank pre-rolling, inner surface boring and outer surface turning. The pipe blank pre-preparation process is carried out before cogging rolling in an existing titanium alloy pipe preparation process, so that the inner and outer diameter deviation of the pipe blank is effectively reduced, the defects of the inner and outer surfaces of the pipe blank are eliminated or reduced, the pipe blank meeting the process requirements is obtained, generation and expansion of cracks on the inner and outer surfaces of the pipe in the subsequent machining process are greatly reduced, and the production efficiency is improved. Therefore, the ultrasonic flaw detection qualification rate of the titanium alloy super-long seamless pipe is increased, the obtained product is high in precision and good in stability, the product quality is met and stabilized, meanwhile, the machining efficiency is improved, and the ultrasonic flaw detection device is convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy seamless pipe processing, and in particular relates to a processing method for improving the pass rate of ultrasonic flaw detection of titanium alloy ultra-long seamless pipe. Background technique [0002] Metal titanium is known as the metal of the 21st century. It is a kind of rare metal. Its main characteristics are low density, light weight, high strength and corrosion resistance. It is widely used in heat exchangers of large chemical projects and many other aspects. As the production capacity of chemical projects increases, the volume of the supporting titanium heat exchangers is getting larger and larger, and the length of the seamless pipes used is getting longer and longer. Around 2005, the length of a single pipe used in heat exchangers was basically concentrated at about 6000mm. Since 2010, the length of a single pipe has exceeded 10000mm, or even longer. As the length of a singl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 渠静雯石明华雷江刘跃刘海明周军孙涛涛许杰李洁李博帅
Owner 西安西部新锆科技股份有限公司
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