Hard platinum alloy and preparation method thereof

A platinum alloy and metal technology, which is applied in the field of hard platinum alloy and its preparation, can solve the problems of low hardness of platinum-palladium alloy, falling stones and turquoise, difficult gas removal, etc., to eliminate tissue defects and residual stress, improve strength, and prevent deformation and cracking effect

Active Publication Date: 2016-12-21
深圳市金铸坊珠宝有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, palladium is a very active metal, which will absorb a large amount of hydrogen at high temperature, resulting in a large amount of gas inside the alloy, and these gases are difficult to remove; eventually, there are shrinkage and gasification pores in platinum alloy castings, which are prone to fracture ; Moreover, the platinum-palladium alloy has low hardness and is easy to deform, and it is easy to drop stones and turquoise during the stone setting process.

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  • Hard platinum alloy and preparation method thereof

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Embodiment 1

[0023] Such as figure 1 , the present embodiment discloses a hard platinum alloy containing 89.9-95.99wt% platinum, 4.0-9.6wt% cobalt and 0.01-0.5wt% X, where X is selected from tungsten, iridium, ruthenium, A kind of in zirconium, osmium, chromium, rhodium, titanium, molybdenum; The preparation method of this hard platinum alloy comprises the steps:

[0024] The metal raw materials in the platinum alloy are compounded according to weight percentage of 90.2wt% platinum, 9.6wt% cobalt and 0.2wt% X. Metal cobalt has excellent physical, chemical and mechanical properties. Metal cobalt is an important raw material for the production of materials such as high temperature resistance, corrosion resistance, high strength and strong magnetism; therefore, metal cobalt is added to platinum alloys to increase the strength of platinum alloys. In this embodiment, X is made of ruthenium, which can increase the hardness of the platinum alloy. Put the weighed platinum into an alumina crucibl...

Embodiment 2

[0029] The devices, process parameters and process flow included in this embodiment are basically the same as in Example 1, except that the weight percentage of platinum in the platinum alloy is 95.2%, the weight percentage of cobalt is 4.6% and the weight percentage of ruthenium is 0.2% . Compared with Example 1, in this example, the weight percentage of platinum is increased by 5%, and the weight percentage of cobalt is reduced by 5%, which increases the stability of the platinum alloy and strengthens the firmness of the diamond setting.

Embodiment 3

[0031] The devices, process parameters and process flow included in this embodiment are basically the same as in Example 1, except that the weight percentage of platinum in the platinum alloy is 95.8%, the weight percentage of cobalt is 4.0% and the weight percentage of ruthenium is 0.2% . Compared with Example 2, in this example, the weight percentage of platinum is increased by 0.6%, and the weight percentage of cobalt is reduced by 0.6%, which further increases the stability of the platinum alloy and strengthens the firmness of the platinum alloy in the mosaic process. sex.

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Abstract

The invention discloses hard platinum alloy and a preparation method thereof. The hard platinum alloy is prepared from the following components in percentage by weight: 89.9-95.99wt% of platinum, 4.0-9.6wt% of cobalt and 0.01-0.5wt% of X. The preparation method comprises the following steps: burdening, metal melting, and forming, wherein metal melting is that weighed metal is put into an alumina crucible and heated to 1850-1900 DEG C to carry out melting; forming is that platinum alloy after being melted into liquid is poured into a strip groove to obtain the platinum alloy after being solidified; and the platinum alloy after being cooled is heated to 700-800 DEG C, heat preservation is carried out for 3h, slow cooling along with a furnace is carried out, and annealing treatment is realized. According to the preparation method, the phenomena that a casting breaks and deforms when a platinum alloy rough blank is casted are effectively prevented, the contractible and volatile blowholes are prevented from occurring in the platinum alloy casting, and in addition, the phenomenon that stones loosen and fall in the stone inlaying procedure is prevented.

Description

technical field [0001] The invention relates to the field of metal and alloy materials, in particular to a hard platinum alloy and a preparation method thereof. Background technique [0002] Platinum alloys refer to alloys made of platinum mixed with other metals, such as palladium, rhodium, yttrium, ruthenium, cobalt, osmium, copper, etc. Although the hardness of platinum is higher than that of gold, it is not enough for inlays. It must be alloyed with other metals before it can be used to make jewelry. [0003] At present, the types of platinum alloys processed into platinum jewelry in China include PT900, PT950 and PT999. Wherein, the composition of PT900 platinum alloy is 90% platinum and 10% palladium or 10% copper, and the composition of PT950 platinum alloy is 95% platinum and 5% palladium or 5% copper. However, palladium is a very active metal, which will absorb a large amount of hydrogen at high temperature, resulting in a large amount of gas inside the alloy, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04C22C1/02B22D13/00B22D18/00C22F1/14
CPCB22D13/00B22D18/00C22C1/02C22C5/04C22F1/14
Inventor 张贵才
Owner 深圳市金铸坊珠宝有限公司
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