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Sulfuration-resistant brown low-silver alloy for lightweight Tibetan silver jewelries and process thereof

A lightweight, sulfuration-resistant technology, applied in the field of alloys, can solve the problems of lack of corrosion resistance, acceleration, vulcanization and blackening, etc., and achieve the best processing deformation performance, broad market prospects, and the effect of refined structure

Inactive Publication Date: 2018-11-13
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of alloy does not have sufficient corrosion resistance to discolor after use, or the vulcanization and blackening are accelerated due to wear and tear out of the base alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A sulfide-resistant brown low-silver alloy for lightweight Tibetan silver jewelry and its technology. In terms of weight percentage, the composition of the alloy is Li: 1.0wt.%, Os: 0.4wt.%, Mg: 5.0wt.%, Ta: 0.2wt.%, Cd: 1.5wt.%, Mn: 2.0wt.% , Ag: 29.0wt.%, the balance is copper. The above-mentioned light-weight Tibetan silver jewellery, sulfide-resistant brown low-silver alloy and its process, comprise the following steps: adding the above proportioned raw materials into an induction furnace under an argon environment, and using a graphite crucible; melting at 1200 degrees Keep warm for 10 minutes, stir evenly with high-frequency induction furnace electromagnetically; after stirring evenly, keep warm at 1200 degrees for 1 minute and cast out of the furnace; alloy casting uses a steel mold with a diameter of 20-30mm, and uses water cooling to cool down. Roll the obtained ingot at room temperature, and the amount of rolling in each pass is 20-30%; after every two rollin...

Embodiment 2

[0021] A sulfide-resistant brown low-silver alloy for lightweight Tibetan silver jewelry and its technology. In terms of weight percentage, the composition of the alloy is Li:1.2wt.%, Os:0.6wt.%, Mg:6.0wt.%, Ta:0.4wt.%, Cd:1.8wt.%, Mn:3.0wt.% , Ag: 31.0wt.%, the balance is copper. The above-mentioned light-weight Tibetan silver jewellery, sulfide-resistant brown low-silver alloy and its process, comprise the following steps: adding the above proportioned raw materials into an induction furnace under an argon environment, and using a graphite crucible; melting at 1200 degrees Keep warm for 10 minutes, stir evenly with high-frequency induction furnace electromagnetically; after stirring evenly, keep warm at 1200 degrees for 1 minute and cast out of the furnace; alloy casting uses a steel mold with a diameter of 20-30mm, and uses water cooling to cool down. Roll the obtained ingot at room temperature, and the amount of rolling in each pass is 20-30%; after every two rollings, th...

Embodiment 3

[0024] A sulfide-resistant brown low-silver alloy for lightweight Tibetan silver jewelry and its technology. In terms of weight percentage, the composition of the alloy is Li:1.1wt.%, Os:0.5wt.%, Mg:5.2wt.%, Ta:0.3wt.%, Cd:1.6wt.%, Mn:2.5wt.% , Ag: 29.0wt.%, the balance is copper. The above-mentioned light-weight Tibetan silver jewellery, sulfide-resistant brown low-silver alloy and its process, comprise the following steps: adding the above proportioned raw materials into an induction furnace under an argon environment, and using a graphite crucible; melting at 1200 degrees Keep warm for 10 minutes, stir evenly with high-frequency induction furnace electromagnetically; after stirring evenly, keep warm at 1200 degrees for 1 minute and cast out of the furnace; alloy casting uses a steel mold with a diameter of 20-30mm, and uses water cooling to cool down. Roll the obtained ingot at room temperature, and the amount of rolling in each pass is 20-30%; after every two rollings, th...

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Abstract

The invention discloses a sulfuration-resistant brown low-silver alloy for lightweight Tibetan silver jewelries and a process thereof. The sulfuration-resistant brown low-silver alloy is prepared fromthe following components in percentage by weight:1.0 percent to 1.2 percent of Li, 0.4 percent to 0.6 percent of Os, 5.0 percent to 6.0 percent of Mg, 0.2 percent to 0.4 percent of Ta, 1.5 percent to1.8 percent of Cd, 2.0 percent to 3.0 percent of Mn, 29.0 percent to 31.0 percent of Ag, and the balance of copper. The material provides a lightweight selection scheme for Tibetan silver jewelries in China; the obtained product has excellent brown perception and has extremely high hydrogen sulfide corrosion resistance. Due to implementation and industrialization of the material, updating of products and upgrading of industry of the jewelry industry in China can be effectively propelled.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a silver alloy. Background technique [0002] Silver is a precious metal with a silver-white metal. Because silver itself is very soft, alloying elements are added to form a silver alloy with excellent mechanical properties. There are three main grades of traditional decorative silver: sterling silver, 958 silver and 925 silver, of which 958 silver and 925 silver are binary alloys composed of copper as an alloying element. The 958 silver alloy has a high silver content, with a silver content of 95.8 wt%, while the 925 silver content is 92.5 wt%. With the development of material science, the formulations of silver alloys are also constantly updated, and many types of 958 and 925 silver have appeared. Because of the differences in the types, contents, and processing methods of metal elements added, the chemical properties and mechanical properties of various silver alloys are diffe...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08C22F1/02C23C8/12
CPCC22C9/00C22C1/02C22F1/02C22F1/08C23C8/12
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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