Method for electroforming hard gold product

Abstract

The invention relates to a method for electroforming hard gold products. The method comprises the following steps: template picking, mould pouring, wax repairing and electric conducting layer coating are carried out to obtain a wax mould of a gold product to be processed, and a layer of electric conductive oil is coated on the surface of the wax mould; and a titanium net is taken as anode in the gold electroforming step, the wax mould coated with the electric conductive oil is put in an electrotyping bath as cathode, the electroforming solution is put in the electrotyping bath and includes sulfurous acid gold potassium, ammonium sulfite and potassium citrate, wherein the sulfurous acid gold potassium is combined with the ammonium sulfite, a trivalent gold ion is reduced into a univalent gold ion, the univalent gold ion generates close crystal grains, the close crystal grains are combined through the potassium citrate to form complexing gold through PH buffer solution, the gold is deposited on the wax mould to form a casting gold layer, and the half-finished product is prepared; and the wax film in the half-finished product and the electric conductive layer are removed in the wax removal step and the electric conductive layer removal step to obtain the finished product. The volume and the hardness of the gold product are changed by using the variation of the chemical structure of the gold ion, so that the hardness, the volume and the toughness of the gold product meet the standards simultaneously.

Description

technical field [0001] The invention relates to the field of gold production, in particular to a method for electroforming hard gold products. Background technique [0002] With the improvement of people's living standards, gold, as a noble metal with stable chemical properties (density: 19.3g / cm3, melting point 1062.7°C) and good physical properties (plasticity, ductility), its application range is becoming wider and wider. , such as: making jewelry, decoration pieces, hardware pieces, etc. With the development and utilization of gold products in various fields, people have higher and higher requirements for the quality, volume and hardness of gold products, and the shape of gold products is becoming more and more complicated. In the prior art, the electroforming gold process can It breaks through the shortcomings of the previous gold processing technology, such as simple shape, rigid shape, and difficult variety. The gold products obtained by the electroforming gold proce...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for electroforming hard gold products aimed at the disadvantages of insufficient hardness, easy deformation, and low yield rate of gold products produced by the above-mentioned existing electroforming gold process, which is beneficial to the existing Some electroforming gold processes are improved, using changes in the chemical structure of gold ions to change the volume and hardness of gold products, which can effectively improve the hardness of gold products

Images