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Rolling deformation analysis method of thick-wall metal tube

A metal pipe and rolling deformation technology, which is applied in the field of rolling deformation analysis of thick-walled metal pipes, and achieves the effect of simple and easy method and low cost.

Active Publication Date: 2014-02-19
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the research method of rolling processing for thick-walled pipes.

Method used

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  • Rolling deformation analysis method of thick-wall metal tube
  • Rolling deformation analysis method of thick-wall metal tube
  • Rolling deformation analysis method of thick-wall metal tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take the rolling process of Φ45mm→Φ32mm for a thick-walled titanium pipe with a ratio of outer diameter to wall thickness of 5 to 10 as an example.

[0030] (1) Take the Φ32mm pass deformation cone, and the length of the deformation cone is from the beginning deformation point of the pipe material to the deformation end point;

[0031] (2) Degreasing and rinsing is carried out to the deformed cone described in step (1), and then the deformed cone of Φ 32mm is drawn equidistantly from the deformation start point to the deformation end point along the center line according to the distance of 50mm ( Such as figure 1 shown);

[0032] (3) Install the deformed cone with the line marked in step (2) on the wire cutting machine tool, so that the center line of the deformed cone is perpendicular to the molybdenum wire cut by wire, and the verticality accuracy is IT6 level, and then Line cutting along the scribe line;

[0033] (4) grinding and polishing each section of the smal...

Embodiment 2

[0040] Take the Φ32mm→Φ22mm rolling process of a thick-walled zirconium tube with a ratio of outer diameter to wall thickness of 5 to 10 as an example.

[0041] (1) Take the Φ22mm pass deformation cone, and the length of the deformation cone is from the beginning deformation point of the pipe material to the deformation end point;

[0042] (2) Degreasing the deformed cone described in step (1) is carried out and rinsed clean, and then the deformed cone of Φ 22 mm is drawn equidistantly from the deformation start point to the deformation end point along the center line according to the distance of 10 mm ( Such as figure 1 shown);

[0043] (3) Install the deformed cone with the line marked in step (2) on the wire cutting machine tool, so that the center line of the deformed cone is perpendicular to the molybdenum wire cut by wire, and the verticality accuracy is IT6 level, and then Line cutting along the scribe line;

[0044] (4) grinding and polishing each section of the sma...

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Abstract

The invention discloses a rolling deformation analysis method of a thick-wall metal tube, comprising the following steps of: 1, taking a deformed cone; 2, carrying out oil-removing treatment on the deformed cone, rinsing clean, and equidistantly lining along the center line of the deformed cone; 3, carrying out linear cutting on the deformed cone along the line; 4, rubbing and polishing the small end face of the deformed cone; 5, dividing the thickness of the wall into 4-6 equal parts along the radial direction of the small end face; 6, carrying out a microhardness test at the equally dividing points, taking the deflection of a cross section as X-axis, respectively taking hardness and wall thickness as Y-axis, recording and marking the wall thickness and hardness number in the coordinate plane; 7, making a smooth curve; 8, analyzing the change rule of the hardness and wall thickness of the tube so as to make a research on the change rule of metal rolling deformation. The method provided by the invention is simple and easy to operate, and requires low cost. According to the method, the Rolling deformation rule of the metal tube can be elaborated in details through the analysis of the deformation degree-hardness curve and the deformation degree-wall thickness curve.

Description

technical field [0001] The invention belongs to the technical field of rolling deformation analysis, in particular to a method for analyzing rolling deformation of thick-walled metal pipes. Background technique [0002] The pressure vessels commonly used in petroleum, chemical and other industries, due to the special environment such as high pressure and corrosive media, require the pipes used in this field to have high strength, thickness and good corrosion resistance. Gr.3, Gr.2, TA18, R60702 and other materials have excellent room temperature mechanical properties and corrosion resistance, so thick-walled pipes of this material are widely used in the field of pressure vessels. [0003] The cold-rolling of thick-walled tubes has always been a technical problem, especially for thick-walled tubes with a diameter-to-thickness ratio (D / S) ≤ 10, which are prone to defects such as inner surface cracks and folds during the rolling process. However, the research method of rolling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/20
Inventor 杨亚社齐元昊杨永福南莉孙蕊韦培文周峰董宏军李刚杨建朝
Owner WESTERN TITANIUM TECH