Method of producing precious metal alloy objects

A technology of precious metals and alloys, which is applied in the field of dental implants and decorative components, and can solve problems such as difficulty in hardness workability, reduction in workability of alloys, difficulty in forming final products, etc.

Inactive Publication Date: 2011-05-11
BIOPM AB
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The process is by no means simple, for example increased hardness due to strain hardening e.g. during cold working of the raw material can cause difficulties due to reduced workability, conversely hot working of the raw material can significantly reduce the workability of the alloy making it difficult to form final item
Also, after casting the raw material, the alloy is brittle and requires an additional annealing step

Method used

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  • Method of producing precious metal alloy objects
  • Method of producing precious metal alloy objects
  • Method of producing precious metal alloy objects

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Embodiment Construction

[0025] During the manufacture of precious metal alloy articles, the alloying elements are usually melted and subsequently cast to form the precious metal alloy article (so-called raw material), which is then subjected to processes including, for example, forging, welding, brazing, casting, grinding, polishing or Post-processing such as stretching to form precious metal alloy items such as jewelry. It is an object of the present invention to provide a method for the manufacture of precious metal objects which are biocompatible and thus do not cause sensitization when carried in contact with the human body. Examples of such articles are jewelry (including piercing jewelry), other kinds of decorative components, dental implants, etc., as well as the aforementioned raw materials. The precious metal alloy composition according to the present invention comprises precious metal alloy compositions commonly used for components such as jewelry, dental implants and decorations. Examples...

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Abstract

The present invention provides a method for manufacturing a biocompatible precious metal alloy object. According to a first aspect melting of alloying elements and casting of the biocompatible precious metal alloy are carried out in a process chamber (11) being provided with a process gas of predetermined composition. A burning flame (19) of a hydrocarbon-containing gas provides low oxygen and water content. According to a second aspect post-processing of a precious metal alloy is made in atmosphere provided by the process gas to form the biocompatible precious metal alloy object. The biocompatible precious metal alloy object manufactured according to the invention has a low probability of causing sensitisation when in contact with the human body.

Description

technical field [0001] The present invention relates to precious metal alloys and methods for their manufacture. In particular, the invention relates to precious metal alloy articles intended to come into contact with the human body, such as jewelry and other precious metal containing articles, such as dental implants and decorative components. Background technique [0002] Precious metals are often used in jewelry or other items intended to come into contact with the human body. One reason for this is that noble metals are less reactive than most elements. Another reason is their high economic value. Additionally, precious metals often have an attractive luster and high ductility. The best known precious metals are gold and silver, but other precious metals such as platinum and palladium are also commonly used for the same purpose. [0003] Precious metal items worn on the human body are subject to wear and damage. The ductility of noble metals is an advantage because ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/00C22C1/02
CPCB22D27/003C22C1/02C22C5/02C22C5/06B23K35/383C21D1/74C22F1/14
Inventor 波·卡尔森
Owner BIOPM AB
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