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Manufacturing method for hexagonal seamless tube

A manufacturing method and technology for seamless pipes, which are used in manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of overall consideration of surface quality uniformity and pipe performance uniformity, and achieve good surface quality, uniform and stable performance. , the effect of high dimensional accuracy

Pending Publication Date: 2018-06-15
ZHEJIANG JIULI HI TECH METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional stainless steel and alloy hexagonal seamless pipes are usually prepared by machining the inner and outer surfaces of round pipe billets or by cold drawing. Such methods cannot give overall consideration to the uniformity of pipe performance, size, and surface quality.

Method used

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  • Manufacturing method for hexagonal seamless tube

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Embodiments of the present invention include the following specific steps:

[0023] Step 1, cold rolling processing, the C276 alloy billet is cold rolled at least twice to complete the production of the intermediate round tube. In this step, the billet needs to be cold rolled multiple times, and the feed rate in the cold rolling process is 1~3.4mm , The rolling speed is 10~100n / min. Multi-roll mill rolling is conducive to the control of the quality of the inner and outer surfaces of the pipe, especially the quality control of the inner surface, and is conducive to the control of the dimensional accuracy of the pipe. Through experiments, it is found that when the deformation increases from 15% to 50%, the yield strength of the billet gradually increases from 900MPa to 1250MPa, and the increase is relatively uniform. If a multi-roll mill is used, the r...

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Abstract

The invention discloses a manufacturing method for a hexagonal seamless tube. The manufacturing method comprises the following specific steps that 1, cold rolling is carried out, wherein at least twotimes of cold rolling on a blank is carried out to complete manufacturing of a middle circular tube; 2, heat treatment is carried out, wherein the middle circular tube is heated and then is subjectedto heat preservation; and 3, forming cold rolling is carried out, wherein a formed tube with a radial section with a hexagonal outer contour and a hexagonal inner hole contour is rolled by adopting acold rolling process of combination of multiple machining rollers. The manufacturing method has the advantages that the stainless steel and alloy hexagonal seamless tube with high size precision, thegood surface quality and the stable performance can be successfully manufactured.

Description

technical field [0001] The invention relates to the technical field of production of hexagonal seamless pipes, in particular to a method for manufacturing hexagonal seamless pipes. Background technique [0002] Hexagonal tubes are used in some fields because of their special tube structure. Traditional stainless steel and alloy hexagonal seamless pipes are usually prepared by machining the inner and outer surfaces of round pipe billets or by cold drawing. Such methods cannot give overall consideration to the uniformity of pipe performance, size, and surface quality. Contents of the invention [0003] The purpose of the present invention is to provide a hexagonal seamless pipe manufacturing method, the present invention overcomes the shortcomings in the processing and manufacturing technology of special-shaped seamless pipes, and provides a stainless steel and alloy that can ensure dimensional tolerance, performance uniformity, and high surface quality Hexagonal seamless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B23/00B21B27/02
CPCB21B23/00B21B27/024
Inventor 孙文强王宝顺杨晨谢飞王曼闵明坤
Owner ZHEJIANG JIULI HI TECH METALS
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