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Aluminum alloy pipe for coal mine column and preparation method thereof

An aluminum alloy and pillar technology, which is applied in mining equipment, pillars/brackets, earthwork drilling, etc., can solve problems such as poor mechanical properties, low load bearing capacity, and short service life, so as to improve wear resistance and service life The effect of improving life, improving strength and improving mechanical properties

Inactive Publication Date: 2007-09-19
NORTHEAST LIGHT ALLOY CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low load-bearing capacity, poor mechanical properties and short service life of existing pipes for coal mine pillars, the present invention provides an aluminum alloy pipe for coal mine pillars and a preparation method thereof. The specific technical scheme for solving the above-mentioned problems is as follows:

Method used

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specific Embodiment approach 1

[0011] Embodiment 1: The aluminum alloy pipe material for coal mine pillars in this embodiment has a Si content of 0-0.04%, an Fe content of 0-0.04%, a Cu content of 0.55-0.99%, and a Mn content of 0.15-0.35% by weight. %, the Mg content is 2.60-2.90%, the Zn content is 4.60-5.20%, and the balance is made of Al.

specific Embodiment approach 2

[0012] Specific embodiment two: In this embodiment, the content of Si is 0.01%, the content of Fe is 0.04%, the content of Cu is 0.55%, the content of Mn is 0.35%, the content of Mg is 2.60%, the content of Zn is 5.20%, and the balance Made of Al.

specific Embodiment approach 3

[0013] Specific embodiment three: In this embodiment, by weight percentage, the Si content is 0.02%, the Fe content is 0.02%, the Cu content is 0.7%, the Mn content is 0.25%, the Mg content is 2.75%, the Zn content is 4.9%, and the balance Made of Al.

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Abstract

Aluminium alloy tubes for pillar for coal mine and a method for preparation, relate to the tubes and a method for preparing the same. The invention solves the problem that the existing tubes for pillar for coal mine have low bearing capacity. The tubes of the invention comprises, based on weight percentage, Si of 0-0.04%, Fe of 0-0.04%, Cu of 0.55-0.99%, Mn of 0.15-0.35%, Mg of 2.6-2.9%, Zn of 4.60-5.20%, and the residuel of Al. The method includes: 1) hollow cast ingot made of, based on weight percentage, Si of 0-0.04%, Fe of 0-0.04%, Cu of 0.55-0.99%, Mn of 0.15-0.35%, Mg of 2.6-2.9%, Zn of 4.60-5.20%, and the residuel of Al; 2) extruding to form hollow tubes; 3) quenching the extruding formed hollow seamless tubes; 4) hot treatment and roller straightening to produce aluminium alloy tubes for pillar for coal mine. The tubes produced by the method of the invention have tensile strength of 470 Mpa, yield strength of 420 Mpa, while wear property and service life of the tubes are improved.

Description

technical field [0001] The invention relates to a pipe material for coal mine pillars and a preparation method thereof. Background technique [0002] The pipes used in coal mine pillars have been using steel in the past. In order to reduce the weight, the material used for the pipes abroad has been gradually replaced by aluminum alloys with small specific gravity and high strength since the 1970s. The pipe components used for coal mine pillars bear heavy loads during use. The existing pipes for coal mine pillars have low load bearing capacity, poor mechanical properties and short service life. Contents of the invention [0003] In order to solve the problems of low load-bearing capacity, poor mechanical properties and short service life of existing pipes for coal mine pillars, the present invention provides an aluminum alloy pipe for coal mine pillars and a preparation method thereof. The specific technical scheme for solving the above-mentioned problems is as follows: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053E21D15/00
Inventor 左宏卿宋微夏建奎李世伟吴欣凤
Owner NORTHEAST LIGHT ALLOY CO LTD
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