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Bimetal metallurgy composite bent pipe heat treatment technology

A composite elbow and bimetal technology, which is applied in the field of heat treatment, can solve the problem of difficulty in eliminating the reduction of mechanical properties, and achieve the effect of ensuring corrosion resistance, smooth inner wall and high service life.

Inactive Publication Date: 2018-10-12
苏州罗克莱科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For bimetallic metallurgical composite elbows, most of them adopt direct thermal induction bending after welding and then tempering treatment, but this treatment process is difficult to eliminate the problem of mechanical performance reduction in the heat-affected zone formed during the bending process, especially in the bending process. Starting point and ending point

Method used

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  • Bimetal metallurgy composite bent pipe heat treatment technology

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] A heat treatment process for a bimetallic metallurgical composite elbow, comprising the following steps:

[0020] Step 1: Overlay welding of the base pipe: take the bimetallic metallurgical composite pipe, machine the welding slope at both ends of the bimetallic metallurgical composite pipe, and surfacing metal of the same material as the bimetallic metallurgical composite pipe on the processed welding slope , and then form a surfacing layer by machine tool processing;

[0021] Step 2: pre-bending treatment: block one end of the bimetallic metallurgical composite pipe, and pour a medium with a temperature of 145°C into it;

[0022] Step 3: Bending: When the temperature of the medium in step 2 is cooled to 82°C, use a pipe bending machine to bend to make a bimetallic metallurgical composite bend;

[0023] Step 4: Quenching: Heat the bimetallic metallurgical composite elbow prepared in Step 3 to 890°C in the heating furnace, keep it warm for 45 minutes, and then quickly ...

Embodiment 2

[0027] A heat treatment process for a bimetallic metallurgical composite elbow, comprising the following steps:

[0028] Step 1: Overlay welding of the base pipe: take the bimetallic metallurgical composite pipe, machine the welding slope at both ends of the bimetallic metallurgical composite pipe, and surfacing metal of the same material as the bimetallic metallurgical composite pipe on the processed welding slope , and then form a surfacing layer by machine tool processing;

[0029] Step 2: Pre-treatment of bending: block one end of the bimetallic metallurgical composite pipe, and pour a medium with a temperature of 150°C into it;

[0030] Step 3: Bending: When the temperature of the medium in step 2 is cooled to 87°C, use a pipe bending machine to bend to make a bimetallic metallurgical composite bend;

[0031] Step 4: Quenching: Heat the bimetallic metallurgical composite elbow prepared in Step 3 to 890°C in a heating furnace, keep it warm for 50 minutes, and then quickly...

Embodiment 3

[0035] A heat treatment process for a bimetallic metallurgical composite elbow, comprising the following steps:

[0036] Step 1: Overlay welding of the base pipe: take the bimetallic metallurgical composite pipe, machine the welding slope at both ends of the bimetallic metallurgical composite pipe, and surfacing metal of the same material as the bimetallic metallurgical composite pipe on the processed welding slope , and then form a surfacing layer by machine tool processing;

[0037] Step 2: pre-bending treatment: block one end of the bimetallic metallurgical composite pipe, and pour a medium with a temperature of 155°C into it;

[0038] Step 3: Bending: When the temperature of the medium in step 2 is cooled to 90°C, use a pipe bender to bend to make a bimetallic metallurgical composite bend;

[0039] Step 4: Quenching: Heat the bimetallic metallurgical composite elbow prepared in Step 3 to 930°C in a heating furnace, keep it warm for 65 minutes, and then quickly cool it to ...

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Abstract

The invention relates to the technical field of heat treatment, in particular to a bimetal metallurgy composite bent pipe heat treatment technology. The bimetal metallurgy composite bent pipe heat treatment technology comprises the following steps that firstly, base pipe surfacing is conducted, a bimetal metallurgy composite pipe is taken, welding slopes are formed at the two ends of the bimetal metallurgy composite pipe through machining, metal is arranged on the machined welding slopes in a surfacing manner, and then a surfacing layer is formed through turning of a machine tool, wherein themetal and the bimetal metallurgy composite pipe are the same in material; secondly, bending pretreatment is conducted, one end of the bimetal metallurgy composite pipe is blocked, and a medium with the temperature ranging from 140 DEG C to 160 DEG C is poured into the bimetal metallurgy composite pipe; and thirdly, bending is conducted, and when the temperature of the medium in the second step isreduced to 80-90 DEG C through cooling, a pipe bending machine is adopted for bending, and a bimetal metallurgy composite bent pipe is manufactured. The bimetal metallurgy composite bent pipe heat treatment technology has the beneficial effects that the heat affected zone generated during heat induction bending can be eliminated, and the product performance and corrosion resisting performance of acomposite layer are guaranteed; the size precision is high, and the inner wall is smoother; and the hardness and toughness are good, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment process for a bimetallic metallurgical composite elbow. Background technique [0002] For bimetallic metallurgical composite elbows, most of them adopt direct thermal induction bending after welding and then tempering treatment, but this treatment process is difficult to eliminate the problem of mechanical performance reduction in the heat-affected zone formed during the bending process, especially in the bending process. Start and end points of bending. Contents of the invention [0003] The object of the present invention is to solve the shortcomings in the prior art, and propose a heat treatment process for a bimetallic composite elbow. [0004] In order to achieve the above object, the present invention adopts the following technical solutions: [0005] Design a heat treatment process for bimetallic metallurgical composite elbow, including the foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/10C21D9/08B21C37/06B21D9/15
CPCB21C37/06B21D9/15C21D8/10C21D9/085
Inventor 张政罗伟松王良陈成绕建红
Owner 苏州罗克莱科技有限公司
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