Manufacturing method for tin-phosphor bronze strip

A technology of tin phosphor bronze strips and preparation steps, which is applied in the field of preparation of tin phosphor bronze strips, can solve the problems of reverse segregation, poor bending performance of materials, and easy initiation of transverse bending cracks, etc., achieves increased diffusion speed, improved bending properties, and preparation Effects in simple steps

Inactive Publication Date: 2016-11-16
高大元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at adding tin to copper, phosphorus is used as a deoxidizer to form a ternary alloy. The existence of copper phosphide in the structure is easy to cause thermal embrittlement, and the crystallization temperature range of the alloy is wide, and Sn and P with low melting points Diffusion speed is slow, and serious reverse segregation phenomenon is prone to occur when the alloy is solidified, resulting in poor bending properties of the material and the disadvantages of prone to transverse bending cracks. A method of weighing metaphosphoric acid is provided, and after entering pure nitrogen, vacuumizes and reacts. After standing still in the cold trap for three times, phosphine is obtained, which is passed into a tube furnace equipped with tin oxide and zinc powder for reaction, and then reacted with sodium hydroxide solution. After drying, it is put into a tube furnace containing copper powder and zinc powder. React in a three-necked flask of sodium thiosulfate to obtain a mixed melt, press it in a mold to obtain a green body, heat preservation, washing, cold rolling, and heat preservation to obtain a tin phosphor bronze strip

Method used

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  • Manufacturing method for tin-phosphor bronze strip
  • Manufacturing method for tin-phosphor bronze strip
  • Manufacturing method for tin-phosphor bronze strip

Examples

Experimental program
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Effect test

example 1

[0025] First weigh 100g of metaphosphoric acid and put it into a closed reactor, and at the same time, feed pure nitrogen from the bottom of the closed reactor, control the nitrogen feed rate to be 20mL / min, and replace the air in the closed reactor. Vacuumize to 120Pa, then heat to 200°C, react for 1h, and then introduce the reactants into -100°C cold trap, -125°C cold trap and -186°C liquid nitrogen cold trap respectively and let them stand for 20 minutes each, then collect phosphine Then take by weighing 100g tin oxide and 15g zinc powder respectively, put into tube furnace, pass into phosphine in tube furnace simultaneously, control phosphine feed rate to be 18mL / min, feed time is 12min, After the feeding is completed, react for 4 hours; after the above reaction is completed, add 10 mL of sodium hydroxide solution with a mass concentration of 1.6 mol / L to the tube furnace, stir and react for 3 hours, and then put the obtained reactant into a vacuum oven at 50 °C Dry in the...

example 2

[0027]First weigh 125g of metaphosphoric acid and put it into a closed reactor, and feed pure nitrogen from the bottom of the closed reactor at the same time. Vacuumize to 120Pa, then heat to 210°C, react for 1h, and then introduce the reactants into -95°C cold trap, -117°C cold trap and -168°C liquid nitrogen cold trap respectively, and let them stand for 23 minutes, then collect phosphine Then take by weighing 110g tin oxide and 18g zinc powder respectively, put into tube furnace, pass into phosphine in tube furnace simultaneously, control phosphine feed rate to be 19mL / min, feed time is 14min, After the feeding is completed, react for 5 hours; after the above reaction is completed, add 13 mL of sodium hydroxide solution with a mass concentration of 1.6 mol / L to the tube furnace, stir and react for 4 hours, and then put the obtained reactant into a vacuum oven at 55 °C Dry in medium for 2 hours to obtain dry matter; then weigh 40g of copper powder and 6g of sodium thiosulfat...

example 3

[0029] First weigh 150g of metaphosphoric acid and put it into a closed reactor, feed pure nitrogen from the bottom of the closed reactor at the same time, control the nitrogen feed rate to be 22mL / min, replace the air in the closed reactor, after the replacement is completed, Vacuumize to 120Pa, then heat to 220°C, react for 2 hours, then introduce the reactants into -90°C cold trap, -110°C cold trap and -160°C liquid nitrogen cold trap respectively, and let them stand for 25 minutes each, then collect phosphine Then take by weighing 120g tin oxide and 20g zinc powder respectively, put into tube furnace, pass into phosphine in tube furnace simultaneously, control phosphine feed rate to be 20mL / min, feed time is 15min, After the feeding is completed, react for 6 hours; after the above reaction is completed, add 15 mL of sodium hydroxide solution with a mass concentration of 1.6 mol / L to the tube furnace, stir and react for 5 hours, and then put the obtained reactant into a 60°C...

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Abstract

The invention discloses a manufacturing method for a tin-phosphor bronze strip and belongs to the technical field of manufacturing of tin-phosphor bronze strips. The metaphosphoric acid is weighed, after pure nitrogen is introduced, vacuumizing and a reaction are carried out, and after reactants are subjected to still standing in three times of cold traps, phosphine is obtained; the phosphine is introduced into a tube furnace loaded with tin oxide and zinc powder for reaction and then is subjected to a reaction with a sodium hydroxide solution, a reactant is dried and then placed into a three-neck flask loaded with copper powder and sodium thiosulfate for reaction, and mixed melt is obtained; the mixed melt is pressed into a blank in a die, and the tin-phosphor bronze strip is obtained through heat preservation, washing, cold rolling and secondary heat preservation. The manufacturing method has the beneficial effects that the manufacturing steps are simple, the diffusion speed of Sn and P with the low melting points is increased by 10-15%, and the inverse segregation phenomenon during solidification is avoided; and the bending performance of obtained products is improved by 15-22%, and no transverse bending crack exists.

Description

technical field [0001] The invention relates to a preparation method of a tin phosphor bronze strip, belonging to the technical field of tin phosphor bronze strip preparation. Background technique [0002] Tin phosphor bronze is a kind of alloy copper, which has good electrical conductivity, is not easy to generate heat, ensures safety and has strong fatigue resistance. Tin phosphor bronze socket reed hard-wired electrical structure, no rivet connection or no friction contact, can ensure good contact, good elasticity, and smooth insertion and insertion. It is used for high-speed, medium-speed and heavy-duty bearings, and the maximum working temperature is 250°C. It has the characteristics of self-aligning, insensitive to deflection, uniform bearing force, high bearing capacity, radial load at the same time, self-lubricating and maintenance-free. It is used to make springs and spring contacts with good conductivity, wear-resistant parts and anti-magnetic parts in precision ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C9/02
CPCC22C1/00C22C9/02
Inventor 高大元盛海丰
Owner 高大元
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