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A kind of preparation method of silver-magnesium-nickel alloy friction ring

A silver-magnesium-nickel, friction ring technology, applied in the high-standard silver-magnesium-nickel friction ring, high performance, high-quality field of preparation, can solve problems such as large mechanical property deviation, poor batch stability, cracks, etc., to achieve smooth and smooth surface, The effect of uniform composition

Active Publication Date: 2015-09-30
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are only silk and sheet products in China, and the ring products are only in the preliminary trial production stage. The main problem is that the size of the ring products is large, and it is difficult to ensure the uniformity of the chemical composition of the alloy ring during the processing. And it is prone to defects such as inclusions, shrinkage cavities, porosity, cracks, cold shuts, and delamination. It is difficult to control the internal defects of the alloy ingot after smelting and the alloy after processing, and it is difficult to meet the requirements of high quality and high standards. At the same time, the batch is stable Poor performance, especially large deviation of mechanical properties

Method used

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  • A kind of preparation method of silver-magnesium-nickel alloy friction ring
  • A kind of preparation method of silver-magnesium-nickel alloy friction ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare AgMg0.24Ni0.29 silver-magnesium-nickel alloy friction ring, wherein the weight percentage of each alloy composition is: Mg 0.24%; Ni 0.29%, the balance is Ag, and the specific steps are as follows:

[0026] 1) Clean the melting furnace wall of the vacuum intermediate frequency induction furnace to ensure that there are no other metals or pollutants in the furnace.

[0027] 2) After crushing silver and nickel, soak them in dilute sulfuric acid for 0.5h, then use a copper wire brush to remove surface dirt, rinse with clean water, dehydrate with acetone or alcohol, and air dry.

[0028] 3) Put the silver and nickel into the high-purity graphite crucible of the vacuum intermediate frequency induction furnace for smelting and degassing.

[0029] 4) putting the degassed silver and nickel into a high-purity graphite crucible, and melting under the condition of a vacuum of 5-10 Pa to obtain a silver-nickel master alloy.

[0030] 5) Put the silver-nickel intermediate al...

Embodiment 2

[0041] Prepare AgMg0.24Ni0.29 silver-magnesium-nickel alloy friction ring, wherein the weight percentage of each alloy composition is: Mg 0.26%; Ni 0.30%, the balance is Ag, and the specific steps are as follows:

[0042] 1) Clean the melting furnace wall of the vacuum intermediate frequency induction furnace to ensure that there are no other metals or pollutants in the furnace.

[0043] 2) After the silver and nickel are crushed, soak them in degreasing agent for 0.5h, then use a copper wire brush to remove the surface dirt, rinse with clean water, and air dry.

[0044] 3) Putting silver and nickel into different graphite crucibles in a vacuum intermediate frequency induction furnace for melting and degassing.

[0045] 4) putting the degassed silver and nickel into a high-purity graphite crucible, and melting under the condition of a vacuum of 5-10 Pa to obtain a silver-nickel master alloy.

[0046] 5) Put the silver-nickel intermediate alloy into a high-purity graphite cruc...

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Abstract

The invention provides a silver-magnesium-nickel friction ring manufacturing method. The method includes the following steps: cleaning the furnace wall of a vacuum intermediate-frequency sensing furnace and raw materials; subjecting the raw materials to smashing and degassing; smelting under the condition of 5-10Pa in vacuum degree to obtain silver-nickel intermediate alloy; using a silver piece to coat magnesium, using a silver wire to bind the silver-nickel intermediate alloy at the upper end of a crucible, and smelting to obtain silver-magnesium-nickel alloy ingots; using a dilute sulfuric acid solution to remove an oxidation film on the surface of each ingot, processing the ingots whose ingredients, interiors and surfaces are all qualified, using a hydraulic press to flattening a plate after being rolled and cogged, and performing cold forging or hot forging on a bar for many times to enable the bar to meet hardness requirements; adopting wire-electrode cutting and a milling machine to process the plate and the bar into blank rings respectively, using a turning lathe to process the blank rings to be in the size of finished products, and adopting ultrasonic waves and X-ray lossless detection to perform product interior quality detection. A silver-magnesium-nickel friction ring obtained by the method is smooth and flat in surface and free of defects like cracking, peeling and corrosion discoloring.

Description

technical field [0001] The invention relates to a method for preparing a silver-magnesium-nickel alloy friction ring, and in particular provides a method for preparing a high-quality, high-performance and high-standard silver-magnesium-nickel friction ring. Background technique [0002] Silver-magnesium-nickel alloy has the characteristics of "internal oxidation". After internal oxidation, it has good elasticity, electrical conductivity, thermal conductivity, corrosion resistance, and sealing. Its hardness is stable and irreversible (that is, its hardness does not change with temperature rise after internal oxidation) etc. It is preferred as the wear-resistant material for the seal of the hydrogen-oxygen pump of the space launch vehicle. [0003] At present, there are only silk and sheet products in China, and the ring products are only in the preliminary trial production stage. The main problem is that the size of the ring products is large, and it is difficult to ensure th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C22C5/06C22C1/03
CPCB23P15/00C22C1/03C22C5/06
Inventor 史秀梅陈怡兰姚映君陈文敬金凯
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH