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A kind of platinum-based cemented carbide and its preparation method

A cemented carbide and platinum-based technology, which is applied in the field of platinum-based cemented carbide and its preparation, can solve the problems of high cost and price of platinum alloys, achieve great application value, improve castability, machinability, and good gloss

Active Publication Date: 2022-04-01
SHANDONG MEASUREMENT SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, platinum alloys in existing jewelry mainly contain precious metals such as palladium, rhodium, yttrium, ruthenium, gold, and osmium, which makes the cost price of platinum alloys even higher than that of platinum.

Method used

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  • A kind of platinum-based cemented carbide and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A platinum-based hard alloy and a preparation method thereof. The following mass components are weighed: 85.4% platinum, 8.4% copper, 0.2% zinc, 1.0% nickel, 3.0% ruthenium, and 2.0% cobalt. After mixing, put In a vacuum electric arc furnace, under the protection of argon gas, vacuum arc melting is carried out at a melting temperature of 2050°C, and the melting is carried out twice with an interval of 10 minutes. After cooling, the alloy raw material is made. Platinum alloys can be obtained by subjecting alloy raw materials to solution treatment (1200°C, 0.5h)-water quenching-aging treatment (800°C, 0.5h)-water quenching in sequence.

[0024] Cut a few pieces from the middle part of the platinum alloy sample, and carry out the hardness test, the test force is 0.5kg, the holding time is 15s, 5 points are randomly selected, and the average value is taken.

Embodiment 2

[0026] A platinum-based hard alloy and a preparation method thereof. The following mass components are weighed: 85.0% platinum, 8.5% copper, 0.2% zinc, 1.3% nickel, 3.0% ruthenium, and 2.0% cobalt. After mixing, put In a vacuum electric arc furnace, under the protection of argon gas, vacuum arc melting is carried out at a melting temperature of 1950°C, and the melting is carried out twice with an interval of 15 minutes. After cooling, the alloy raw material is made. Platinum alloys can be obtained by subjecting alloy raw materials to solution treatment (1100°C, 0.8h)-water quenching-aging treatment (700°C, 0.8h)-water quenching in sequence.

[0027] Cut a few pieces from the middle part of the platinum alloy sample, and carry out the hardness test, the test force is 0.5kg, the holding time is 15s, 5 points are randomly selected, and the average value is taken.

Embodiment 3

[0029] A platinum-based hard alloy and a preparation method thereof. The following mass components are weighed: 86.0% platinum, 8.0% copper, 0.2% zinc, 1.0% nickel, 2.8% ruthenium, and 2.0% cobalt. After mixing, put In the vacuum electric arc furnace, under the protection of argon, the vacuum arc melting is carried out at a melting temperature of 1850 °C, and the melting is carried out 5 times with an interval of 7 minutes. After cooling, the alloy raw material is made. Platinum alloys can be obtained by subjecting the alloy raw materials to solution treatment (1000°C, 1.0h)-water quenching-aging treatment (650°C, 1.0h)-water quenching in sequence.

[0030] Cut a few pieces from the middle part of the platinum alloy sample, and carry out the hardness test, the test force is 0.5kg, the holding time is 15s, 5 points are randomly selected, and the average value is taken.

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Abstract

The invention relates to alloy manufacture and belongs to the field of metal materials. A platinum-based hard alloy and a preparation method thereof. The platinum alloy material is composed of the following alloy components by mass: 85.0-86.0% platinum, 8-9% copper, 0.1-0.3% zinc, 0.5-1.5% nickel, Ruthenium 2-4%, cobalt 1.5-2.5%. Platinum, copper, zinc, nickel, ruthenium and cobalt are vacuum smelted in the vacuum electric arc furnace, and the smelted platinum alloy is solid solution treated in a vacuum resistance furnace, water quenched to room temperature, and then subjected to aging treatment , and then quenched in water to obtain platinum-based cemented carbide. The platinum-based hard alloy material prepared by the present invention has relatively large hardness, which can reach more than 350HV, has high strength, good gloss and good corrosion resistance, and is low in cost, which is very good for platinum jewelry, especially jewelry. The use of mosaic jewelry.

Description

technical field [0001] The invention relates to the field of platinum alloy processing, in particular to a platinum-based hard alloy and a preparation method thereof. Background technique [0002] As a precious metal, platinum is deeply loved by people for its unique pure white color and aesthetic luster. Platinum has good physical and chemical properties and is widely used in jewelry. [0003] Platinum has good chemical stability, but compared with other precious metal materials, its hardness and strength are usually very low. The annealed hardness is about 40HV, and it is easy to wear or deform during wearing, especially when the platinum material is used as a mosaic bracket, etc. , poor strength leads to insufficient supporting capacity, and needs to be further strengthened, otherwise it cannot be made into various novel styles like other precious metals, and it is difficult to be widely used in the field of jewelry inlays. [0004] In contrast, pure platinum jewelry ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/04C22C1/02C22F1/02C22F1/14C21D1/18
CPCC22C5/04C22C1/02C22F1/002C22F1/02C22F1/14C21D1/18
Inventor 李桂华刘雪松王萍刘海彬李建军张瑞锋付春霞孙永军
Owner SHANDONG MEASUREMENT SCI RES INST
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