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Method for preparing micro-grain tin bronze alloy

A tin bronze and microcrystalline technology, which is applied in the field of preparation of microcrystalline tin bronze alloys, can solve problems such as fracture and surface cracks of billets, and achieves the effects of good manufacturability, low cost and simple process method.

Inactive Publication Date: 2006-06-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the principle and method of the equal channel angular extrusion process are more effective for the grain refinement of magnesium and copper-based alloys with good plasticity, but the grain refinement of metal alloys with poor plasticity is restricted by many factors, and improper operation is easy. Lead to cracks or even fractures on the surface of the billet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The raw materials are prepared according to the mass percentage of 93.5% copper, 4.0% tin and 2.5% lead, and are smelted under vacuum conditions to make a tin-bronze alloy cast billet. The tin bronze billet is subjected to surface treatment, heated to 700°C in a heating furnace, and then forged on a hot die forging press to obtain forged tin bronze alloy rods. Cut the wrought tin-bronze alloy wire into block blanks with a cross-section of 9.3×9.3mm and a length of 100mm, and carry out surface treatment on the blanks to make the surface smooth and flat. Clean the surface of the billet with acetone, place the billet on a clean stainless steel tray, preheat it at 100°C for 20 minutes, and then apply graphite lubricant on the surface of the billet by brushing. The coating should be uniform. After coating, dry the blank at 60°C for 15 minutes. If there are defects such as falling coating, scratches, and peeling, it should be re-coated or washed off for re-coating. Use aceto...

Embodiment 2

[0016] The raw materials are prepared according to the mass percentage of 95.0% copper, 3.0% tin and 2.0% lead, and are smelted under vacuum conditions to make a tin-bronze alloy billet. The tin bronze billet is subjected to surface treatment, heated to 750°C in a heating furnace, and then forged on a hot die forging press to obtain forged tin bronze alloy rods. Cut the wrought tin-bronze alloy wire into block blanks with a cross-section of 9.3×9.3mm and a length of 100mm, and carry out surface treatment on the blanks to make the surface smooth and flat. Clean the surface of the billet with acetone, place the billet on a clean stainless steel tray, preheat it at 100°C for 20 minutes, and then apply graphite lubricant on the surface of the billet by brushing. The coating should be uniform. After coating, dry the blank at 60°C for 15 minutes. If there are defects such as falling coating, scratches, and peeling, it should be re-coated or washed off for re-coating. Use acetone to...

Embodiment 3

[0019] The raw materials are prepared according to the mass percentage of 96.5% copper, 2.0% tin and 1.5% lead, and are smelted under vacuum conditions to make a tin-bronze alloy billet. The tin bronze billet is subjected to surface treatment, heated to 800°C in a heating furnace, and then forged on a hot die forging press to obtain forged tin bronze alloy rods. Cut the wrought tin-bronze alloy wire into block blanks with a cross-section of 9.3×9.3mm and a length of 100mm, and carry out surface treatment on the blanks to make the surface smooth and flat. Clean the surface of the billet with acetone, place the billet on a clean stainless steel tray, preheat it at 100°C for 20 minutes, and then apply graphite lubricant on the surface of the billet by brushing. The coating should be uniform. After coating, dry the blank at 60°C for 15 minutes. If there are defects such as falling coating, scratches, and peeling, it should be re-coated or washed off for re-coating. Use acetone to...

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PUM

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Abstract

The invention relates the method for preparation of microcrystal tin bronze alloy, comprising the following steps: melting the 93.5-96.5wt% Cu, 2.0-4.0wt% Se and 1.5-2.5% Pb at the condition of vacuum, making the tin bronze alloy casting blank, after surface treating the casting blank, forging it at 650-800Deg.C to make tin bronze bar, cutting the aluminum-bronze plate to lump blank and carrying out surface preparation and coating graphite lubricant, heating the blank and die, squeezing the blank with die and getting the tin bronze alloy plate. The invention improves the mechanical property and frictional behavior of tin bronze alloy, expanding the application area of alloy and meeting the product requirement.

Description

technical field [0001] The invention relates to a preparation method of a micron crystal tin bronze alloy, which adopts a method combining forging and equal channel angular extrusion to prepare a micron crystal tin bronze alloy block material, which improves the mechanical properties of the tin bronze alloy such as plasticity, strength, hardness and the like. Its tribological properties further promote the practical engineering application of the alloy. The invention belongs to the technical field of metal materials and metallurgy. Background technique [0002] Tin bronze has good physical and chemical properties such as electrical conductivity, thermal conductivity, corrosion resistance and ductility, and has good mechanical properties, wear resistance and corrosion resistance. Because tin bronze has the above-mentioned excellent properties, it has a wide range of uses in the industry, including the electrical industry, machinery manufacturing, transportation, construction...

Claims

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Application Information

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IPC IPC(8): C22C9/02C21D1/68C21D8/00C21D11/00C22F1/08
Inventor 程先华高雷雷李振华
Owner SHANGHAI JIAO TONG UNIV
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