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Processing method of 2Cr13 rectangular pipe

A processing method, 2cr13 technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of 2Cr13 rectangular pipes, many production passes, energy waste, etc. The effect of reducing and shortening the process flow

Inactive Publication Date: 2012-06-13
CHANGSHUSMLESS STEEL TUBE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method has many production passes, and generally requires four passes of round tube cold drawing and three passes of special-shaped cold drawing.
At the same time, due to the poor plasticity of the 2Cr13 material, it is easy to crack during cold working, that is, in the process of special-shaped cold drawing, and the more cold drawing passes, the higher the probability of cracking, and the greater the loss of metal materials, resulting in waste of energy. The problem of low rate and high processing cost
[0003] The applicant has searched the literature, but in the published Chinese patent literature, there is neither technical inspiration about the processing method of 2Cr13 rectangular pipes, nor technical information on the processing of other grades such as 1Cr13, 3Cr13 and 4Cr13 rectangular pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 (the present embodiment is two billet cold rolling):

[0028] Take the 2Cr13 rectangular pipe with the processing cross-section specification, that is, the finished product specification as 33mm long x 13mm wide x 3.5mm wall thickness as an example.

[0029] A) material preparation, at first according to the specification requirements of the rectangular tube finished product, it is preferred but not absolutely limited to select the 2Cr13 round bar with a diameter of 60mm produced by Xining Special Steel Co., Ltd., Qinghai Province, China. In the present embodiment, the finished product specification of the rectangular tube is The ratio of the cross-sectional area to the cross-sectional area of ​​the round rod is 1:10.35. The surface treatment of the selected round rod is carried out, specifically: the surface of the round rod is cut (called peeling in the industry) to remove the surface of the round rod. The microcracks of the micro-cracks obtained after su...

Embodiment 2

[0039] Embodiment 2 (the present embodiment is one billet cold rolling):

[0040] Take the 2Cr13 rectangular pipe with the processing cross-section specification, that is, the finished product specification as 44mm long x 15mm wide x 4.5mm wall thickness as an example.

[0041] A) material preparation, at first according to the specification requirements of the rectangular tube finished product, it is preferred but not absolutely limited to select the 2Cr13 round bar with a diameter of 60mm produced by Xining Special Steel Co., Ltd., Qinghai Province, China. In the present embodiment, the finished product specification of the rectangular tube is The ratio of the cross-sectional area to the cross-sectional area of ​​the round bar is 1:6.28. The surface treatment of the selected round bar is carried out, specifically: the surface of the round bar is cut (called peeling in the industry) to remove the surface of the round bar. The micro-cracks, the diameter obtained after surface ...

Embodiment 3

[0051] Embodiment 3 (this embodiment is one billet cold rolling):

[0052] Take the 2Cr13 rectangular pipe with the processing cross-section specification, that is, the finished product specification as length 55mm×width 19mm×wall thickness 5mm as an example.

[0053] A) material preparation, at first according to the specification requirements of the rectangular tube finished product, it is preferred but not absolutely limited to select the 2Cr13 round bar with a diameter of 80mm produced by Xining Special Steel Co., Ltd., Qinghai Province, China. In the present embodiment, the finished product specification of the rectangular tube is The ratio of the cross-sectional area to the cross-sectional area of ​​the round rod is 1:7.85. The surface treatment of the selected round rod is carried out, specifically: the surface of the round rod is cut (called peeling in the industry) to remove the surface of the round rod. The micro-cracks of the surface cutting process are obtained to ...

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Abstract

The invention provides a processing method of a 2Cr13 rectangular pipe, belonging to the field of the processing technology of the martensite stainless steel pipes. The processing method comprises the following steps: preparing materials; heating; punching a hole; annealing; pickling; lubricating; cold-rolling; hammering; cold-drawing and final-annealing; and finishing. The technical scheme provided by the invention only needs one or two passes of cold rolling and twice cold drawings, thus reducing three production passes relative to the production passes in the prior art, further obviously shortening the process flow and having outstanding energy-saving effect; and as the production passes are obviously reduced, the processing method provided by the invention can improve the rolling yield by 8-10 % relative to the rolling yield in the prior art, thus meeting the requirement of the industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of martensitic stainless steel pipe processing, and in particular relates to a processing method for a 2Cr13 rectangular pipe. Background technique [0002] The concept of rectangular pipe mentioned above means that the cross-sectional shape of the pipe is rectangular. The 2Cr13 material belongs to martensitic stainless steel, and its main alloying elements are iron, chromium and carbon. Due to the disadvantages of poor plasticity and difficult cold working of this type of steel, rectangular pipes are usually obtained by cold drawing after piercing round rods. This processing method has many production passes, and generally requires four passes of round tube cold drawing and three passes of special-shaped cold drawing. At the same time, due to the poor plasticity of the 2Cr13 material, it is easy to crack during cold working, that is, in the process of special-shaped cold drawing, and the more cold drawing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D9/08C21D1/26
Inventor 陆建国陈国强王利保石建中吕菊明倪伟刚
Owner CHANGSHUSMLESS STEEL TUBE
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