Extrusion method of BMn40-1.5 manganese copper-nickel alloy tube

An extrusion method and white copper tube technology, applied in the field of manganese white copper extrusion, can solve the problems of difficult preparation of seamless tubes, high deformation resistance, low yield, etc., to avoid serious oxidation, reduce friction, improve surface quality effect

Inactive Publication Date: 2015-11-04
HANDAN XINXING SPECIAL TUBING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual seamless pipe preparation process, due to severe heating and oxidation and high deformation resistance, the preparation of seamless pipes made of this material is difficult and the yield is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of extrusion method of BMn40-1.5 manganese white copper pipe, the steps are as follows:

[0027] The first step is blank preparation, wherein the composition of the tube blank is as follows according to weight percentage: nickel Ni and cobalt Co: 39.0-41.0%, manganese Mn: 1.0-2.0%, lead Pb: ≤0.005%, phosphorus P: ≤0.005 %, silicon Si: ≤0.10%, antimony Sb: ≤0.002%, sulfur S: ≤0.02%, arsenic As: ≤0.010%, carbon C: ≤0.10%, bismuth Bi: ≤0.002%, magnesium Mg: ≤0.05% , the balance is copper Cu, the outer diameter of the tube blank: Φ242mm, the inner hole: Φ45mm, the length: 600mm;

[0028] The second step, primary induction heating, sends the prepared billet into the induction heating furnace for heating. The target temperature of the primary induction heating is 1080°C, the heating time is 8 minutes, and the furnace temperature is 1071°C;

[0029] The third step is glass powder lubrication. After the billet is heated to the target temperature, the billet is sent to t...

Embodiment 2

[0035] A kind of extrusion method of BMn40-1.5 manganese white copper pipe, the steps are as follows:

[0036] The first step is blank preparation, wherein the composition of the tube blank is as follows according to weight percentage: nickel Ni and cobalt Co: 39.0-41.0%, manganese Mn: 1.0-2.0%, lead Pb: ≤0.005%, phosphorus P: ≤0.005 %, silicon Si: ≤0.10%, antimony Sb: ≤0.002%, sulfur S: ≤0.02%, arsenic As: ≤0.010%, carbon C: ≤0.10%, bismuth Bi: ≤0.002%, magnesium Mg: ≤0.05% , the balance is copper Cu, the outer diameter of the tube blank: Φ178mm, the inner hole: Φ75mm, the length: 500mm;

[0037] The second step is induction heating. The prepared billet is directly sent into the induction furnace for induction heating. The target temperature of induction heating is 1110°C, the heating time is 5 minutes, and the temperature of the furnace is 1115°C;

[0038] The third step is glass powder lubrication. After the billet is heated to the target temperature by induction, when the...

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Abstract

The invention discloses an extrusion method of a BMn40-1.5 manganese copper-nickel alloy tube. The method comprises steps as follows: step one, preparation of blanks; step two, primary induction heating; step three, glass powder lubrication; step four, chambering; step five, secondary induction heating; step six, secondary glass powder lubrication; step seven, extrusion forming, wherein the blanks subjected to glass powder lubrication enters an extruder for extrusion forming. By means of the extrusion method of the BMn40-1.5 manganese copper-nickel alloy tube, severe oxidation in the heating process is effectively avoided, adverse factors hindering deformation of the material are avoided, forming of heat cracks in the material forming process is reduced, and the surface quality of a prepared seamless tube is improved. The performance and the size of the seamless BMn40-1.5 manganese copper-nickel alloy tube produced with the method can meet the requirements of a user.

Description

technical field [0001] The invention relates to an extrusion method of manganese white copper, in particular to an extrusion method of BMn40-1.5 manganese white copper pipe. Background technique [0002] BMn40-1.5 manganese white copper is an electrical copper-nickel alloy, commonly known as constantan, which has high resistivity and high thermal electromotive force that hardly changes with temperature, good heat resistance and corrosion resistance, and high mechanical properties, suitable for Used in the production of variable resistance and strain resistance elements of AC instruments. It also has a low temperature coefficient of resistance, a wide operating temperature range (below 480°C), good machinability, corrosion resistance and easy brazing. It can be used to make resistors and components in instruments, electronics, and industrial equipment. It is suitable for use in AC circuits, as precision resistors, sliding resistors, and resistance strain gauges. It can a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C23/00
Inventor 韩恒力庞于思王连华张爱亮
Owner HANDAN XINXING SPECIAL TUBING CO LTD
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