A copper-iron powder metallurgy tube and its application

Abstract

The invention relates to the technical field of air conditioner accessories, in particular to a copper and iron powder metallurgical pipe and a preparing method and an application thereof. The copper and iron powder metallurgical pipe comprises a metallurgical pipe body, the metallurgical pipe body is made from copper powder and iron powder or stainless steel powder, the metallurgical pipe body comprises a copper welding end and an iron welding end, and a boss is fixed to the iron welding end. The copper and iron powder metallurgical pipe can be separately well welded with a copper material component and an iron material component, so that welding cost and difficulty are reduced, and welding quality and efficiency are improved. The copper and iron powder metallurgical pipe is friendly to environment, saving in energy, simple in structure, convenient to use and low in cost.

Description

technical field

[0001] The invention relates to the technical field of air-conditioning accessories, in particular to a copper-iron powder metallurgy pipe and a preparation method and application thereof. Background technique

[0002] At present, the air-conditioning compressor exhaust pipe, suction pipe and air-conditioning piping are all made of pure copper pipes, and are welded to the upper cover of the compressor and other related parts through flame brazing. Due to the high cost of pure copper tubes, silver solder and phosphor copper solder are required for brazing, and the working environment is harsh, the welding efficiency of flame brazing is low, and the quality leakage rate is high. Contents of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a copper-iron powder metallurgy pipe, which can be well welded with copper parts and iron parts respectively, reducing the Wel...

Examples

Embodiment 1

[0035] See Figure 1-2 , a copper-iron powder metallurgy tube, comprising a metallurgical tube body 1, the metallurgical tube body 1 is made of copper powder and iron powder or copper powder and stainless steel powder, the metallurgical tube body 1 includes a copper welding end 11 and an iron welding end 12 , The iron welding end 12 is fixed with the boss 10 .

[0036] The metallurgical pipe body 1 is formed by mixing and pressing copper powder and iron powder. The iron powder weight content of the brazed end 11 of the metallurgical pipe body 1 is less than 50%. Specifically, the iron powder weight content of the brazed end 11 can be 45%. %, 40%, 35%, 30%, 25%, 20%, 15%, 10% or 5%; the copper powder weight content of the iron welding end 12 is less than 30%, specifically, the copper powder weight of the iron welding end 12 The content can be 25%, 20%, 15%, 10% or 5%.

[0037] Another preferred embodiment of the present invention is: the above-mentioned iron powder is replace...

Embodiment 2

[0042] See Figure 3-4 The difference between this embodiment and the above-mentioned embodiment 1 is that: the metallurgical pipe body 1 also includes an intermediate transition section 13 arranged between the brazing end 11 and the iron welding end 12, and the metallurgical pipe body 1 The brazing end 11 is formed by pressing copper powder, the iron welding end 12 is formed by pressing iron powder, and the intermediate transition section 13 is formed by mixing and pressing copper powder and iron powder.

[0043] Another preferred embodiment of the present invention is: the above-mentioned iron powder is replaced by stainless steel powder. That is, the brazing end 11 of the metallurgical pipe body 1 is formed by pressing copper powder, the iron welding end 12 is formed by pressing stainless steel powder, and the intermediate transition section 13 is formed by mixing and pressing copper powder and stainless steel powder.

Embodiment 3

[0045]A method for preparing a copper-iron powder metallurgy pipe, comprising the steps of:

[0046] (1) Raw material preparation: Weigh copper powder and iron powder as raw materials according to needs, and set aside;

[0047] (2) Mold preparation: Prepare and install the molds required for copper-iron powder metallurgy tube pressing;

[0048] (3) Extrusion molding: heat and pressurize copper powder and iron powder to form a semi-finished product;

[0049] (4) Sealing treatment: the semi-finished product is oxidized and sealed to obtain a copper-iron powder metallurgy tube;

[0050] (5) Cutting process: cutting the iron welding end 12 of the copper-iron powder metallurgy tube to remove the sealing oxide layer on the surface of the iron welding end 12 .

[0051] In the step (1), the copper powder is water-atomized copper powder, the iron powder is water-atomized iron powder, and the particle diameters of the copper powder and the iron powder are both 500 μm.

[0052] In the...

technical field

[0001] The invention relates to the technical field of air-conditioning accessories, in particular to a copper-iron powder metallurgy pipe and a preparation method and application thereof. Background technique

[0002] At present, the air-conditioning compressor exhaust pipe, suction pipe and air-conditioning piping are all made of pure copper pipes, and are welded to the upper cover of the compressor and other related parts through flame brazing. Due to the high cost of pure copper tubes, silver solder and phosphor copper solder are required for brazing, and the working environment is harsh, the welding efficiency of flame brazing is low, and the quality leakage rate is high. Contents of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a copper-iron powder metallurgy pipe, which can be well welded with copper parts and iron parts respectively, reducing the Wel...

Examples

Embodiment 1

[0035] See Figure 1-2 , a copper-iron powder metallurgy tube, comprising a metallurgical tube body 1, the metallurgical tube body 1 is made of copper powder and iron powder or copper powder and stainless steel powder, the metallurgical tube body 1 includes a copper welding end 11 and an iron welding end 12 , The iron welding end 12 is fixed with the boss 10 .

[0036] The metallurgical pipe body 1 is formed by mixing and pressing copper powder and iron powder. The iron powder weight content of the brazed end 11 of the metallurgical pipe body 1 is less than 50%. Specifically, the iron powder weight content of the brazed end 11 can be 45%. %, 40%, 35%, 30%, 25%, 20%, 15%, 10% or 5%; the copper powder weight content of the iron welding end 12 is less than 30%, specifically, the copper powder weight of the iron welding end 12 The content can be 25%, 20%, 15%, 10% or 5%.

[0037] Another preferred embodiment of the present invention is: the above-mentioned iron powder is replace...

Embodiment 2

[0042] See Figure 3-4 The difference between this embodiment and the above-mentioned embodiment 1 is that: the metallurgical pipe body 1 also includes an intermediate transition section 13 arranged between the brazing end 11 and the iron welding end 12, and the metallurgical pipe body 1 The brazing end 11 is formed by pressing copper powder, the iron welding end 12 is formed by pressing iron powder, and the intermediate transition section 13 is formed by mixing and pressing copper powder and iron powder.

[0043] Another preferred embodiment of the present invention is: the above-mentioned iron powder is replaced by stainless steel powder. That is, the brazing end 11 of the metallurgical pipe body 1 is formed by pressing copper powder, the iron welding end 12 is formed by pressing stainless steel powder, and the intermediate transition section 13 is formed by mixing and pressing copper powder and stainless steel powder.

Embodiment 3

[0045]A method for preparing a copper-iron powder metallurgy pipe, comprising the steps of:

[0046] (1) Raw material preparation: Weigh copper powder and iron powder as raw materials according to needs, and set aside;

[0047] (2) Mold preparation: Prepare and install the molds required for copper-iron powder metallurgy tube pressing;

[0048] (3) Extrusion molding: heat and pressurize copper powder and iron powder to form a semi-finished product;

[0049] (4) Sealing treatment: the semi-finished product is oxidized and sealed to obtain a copper-iron powder metallurgy tube;

[0050] (5) Cutting process: cutting the iron welding end 12 of the copper-iron powder metallurgy tube to remove the sealing oxide layer on the surface of the iron welding end 12 .

[0051] In the step (1), the copper powder is water-atomized copper powder, the iron powder is water-atomized iron powder, and the particle diameters of the copper powder and the iron powder are both 500 μm.

[0052] In the...

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