Bimetal composite pipe and preparation method thereof

A bimetallic composite pipe and composite pipe technology, which is applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of difficult preparation of stainless steel/nickel-based alloy composite pipes, and achieve the effects of low cost, excellent quality and high efficiency

Pending Publication Date: 2021-07-02
青岛力晨新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned prior art, the present invention provides a bimetallic composite pipe and its preparation method to solve the problem that the current stainless steel / nickel-based alloy composite pipe is difficult to prepare

Method used

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  • Bimetal composite pipe and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing a bimetal composite pipe, comprising the following steps:

[0035] S1: Pretreatment of 304 steel pipes, the pretreatment includes the following steps:

[0036] SS1: Soak 304 steel pipes in 0.1mol / L sodium hydroxide and 0.1mol / L hydrochloric acid solutions for 1 hour respectively, then rinse with deionized water for 3 times, and dry the water on the surface of the base steel pipe;

[0037] SS2: Put the 304 steel pipe after SS1 treatment into nickel ammonium sulfate at a temperature of 600°C, keep it warm for 60 minutes, and grow a binder film coating with a thickness of about 200nm on the surface of the base steel pipe in situ;

[0038] S2: Smelting the Q235 carbon steel to make it into molten steel, and adjusting the temperature of the molten steel to 1530°C; the target carbon steel smelting includes the following steps:

[0039] SS1: Take Q235 carbon steel and heat it to liquid state;

[0040] SS2: Transfer the liquid Q235 carbon steel to the c...

Embodiment 2

[0047] A method for preparing a bimetal composite pipe, comprising the following steps:

[0048] S1: Pretreatment of 304 steel pipes, the pretreatment includes the following steps:

[0049] SS1: Soak 304 steel pipes in 0.1mol / L sodium hydroxide solution and 0.1mol / L hydrochloric acid solution for 1 hour respectively, then rinse with deionized water for 4 times, and dry the water on the surface of the base steel pipe;

[0050] SS2: Put the 304 steel pipe after SS1 treatment into nickel ammonium sulfate at a temperature of 550°C, keep it warm for 45 minutes, and grow a binder film coating with a thickness of about 100nm on the surface of the base steel pipe in situ;

[0051] S2: Smelting the Q235 carbon steel to make it into molten steel, and adjusting the temperature of the molten steel to 1600°C; the target carbon steel smelting includes the following steps:

[0052] SS1: Take Q235 carbon steel and heat it to liquid state;

[0053] SS2: Transfer the liquid Q235 carbon steel ...

Embodiment 3

[0060] A method for preparing a bimetal composite pipe, comprising the following steps:

[0061] S1: Pretreatment of 304 steel pipes, the pretreatment includes the following steps:

[0062] SS1: Soak the 304 steel pipe in the sodium hydroxide solution with a concentration of 0.1mol / L and the hydrochloric acid solution with a concentration of 0.1mol / L for 1 hour respectively, then rinse it twice with deionized water, and then dry the water on the surface of the base steel pipe;

[0063] SS2: Put the 304 steel pipe after SS1 treatment into nickel ammonium sulfate at a temperature of 650°C, keep it warm for 45 minutes, and grow a binder film coating with a thickness of about 150nm on the surface of the base steel pipe in situ;

[0064] S2: Smelting the Q235 carbon steel to make it into molten steel, and adjusting the temperature of the molten steel to 1700°C; the target carbon steel smelting includes the following steps:

[0065] SS1: Take Q235 carbon steel and heat it to liquid s...

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Abstract

The invention discloses a bimetal composite pipe and a preparation method thereof. The preparation method comprises the steps that a solid-liquid composite matched die-casting process is adopted, liquid carbon steel and a solid stainless steel / nickel base alloy pipe are poured to be subjected to metallurgical compounding, a bimetal composite pipe blank with metallurgical compounding strength is obtained, then the composite pipe blank is subjected to die-casting forming, the bonding quality and the wall thickness of the bimetal metallurgy composite pipe blank meet preset requirements, and finally the finished composite pipe is obtained through extrusion or hot rolling and cold rolling or cold rolling. Through cooperation of casting molding and die-casting processes, the forged composite pipe blank is directly prepared, the quality of the composite blank is superior to that of an as-cast composite pipe blank, the process is simple, the efficiency is high, and time and labor are saved.

Description

technical field [0001] The invention belongs to the technical field of solid-liquid composite casting, and in particular relates to a bimetallic composite pipe and a preparation method thereof. Background technique [0002] Bimetal composite pipe refers to a new type of composite material prepared by combining two metals with different properties, which combines the functionality of the clad material and the structural performance of the base material. Stainless steel / nickel-based alloy bimetallic composite pipe has both the corrosion resistance of stainless steel / nickel-based alloy and the high strength of carbon steel. It is a perfect substitute for expensive stainless steel / nickel-based alloy pipes and can greatly save expensive The amount of stainless steel / nickel-based alloy significantly reduces production costs. [0003] The current stainless steel / nickel-based alloy composite pipe technology mainly includes mechanical composite method and metallurgical composite met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B22D19/00F16L9/02
CPCB21C37/06F16L9/02B22D19/00B22D19/0081
Inventor 郝云龙郑震甄云璞
Owner 青岛力晨新材料科技有限公司
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