Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of hard pure gold sealing material and preparation method thereof

A kind of filling and hard technology, which is applied in the field of hard gold filling materials and its preparation, can solve the problems of high melting temperature, difficulty in popularization, and difficulty in wide-scale promotion, so as to achieve grain refinement and improve comprehensive mechanical properties. performance effect

Active Publication Date: 2018-04-17
SHANGHAI JIAOTONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium itself has very active chemical properties and a high melting temperature, so it must invest in expensive smelting and processing equipment and set up sophisticated technology to play its role, so the promotion in the traditional jewelry processing industry encounters difficulties. To very great difficulty, it is difficult to promote on a large scale

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of hard pure gold sealing material and preparation method thereof
  • A kind of hard pure gold sealing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Firstly prepare the filling material, and carry out batching according to the weight ratio, dysprosium 75.0%, indium 13.2%, zinc 3.5%, cobalt powder 8.3%, the average diameter of cobalt powder is 2mm. Two metals, dysprosium and indium, are placed in a graphite crucible, and zinc block and cobalt powder are placed in two compartments in the interlayer on the furnace top, and the interlayer can be poured and fed by external mechanical control. Vacuum to 5*10 after closing the furnace door -3 Pa, and then filled with argon, the pressure is 0.8 atmospheres. Under the protection of an inert atmosphere, the dysprosium-indium binary alloy was smelted in proportion. The melting temperature reached 1450°C to completely melt the binary alloy, and then the power was lowered to reduce the melt temperature to 1150°C. Zinc block and cobalt powder were added in sequence quickly, and the The crucible is vibrated and stirred, and cast into a pre-placed mold to obtain pure gold filling ...

Embodiment 2

[0029] First of all, the filling material is prepared, and the ingredients are prepared according to the weight ratio, dysprosium 80.0%, indium 14.1%, zinc block 2.0%, cobalt powder 3.9%, and the average diameter of the cobalt powder is 1mm. Two metals, dysprosium and indium, are placed in a graphite crucible, and zinc block and cobalt powder are placed in the interlayer of the furnace top in two compartments. Vacuum to 3*10 after closing the furnace door -3 Pa, and then filled with argon, the pressure is 0.8 atmospheres. Under the protection of an inert atmosphere, the dysprosium-indium binary alloy is melted in proportion, and the melting temperature reaches 1400°C to completely melt the binary alloy, and then the power is reduced to 1200°C, and the zinc block and cobalt powder are quickly added in turn, and the crucible Vibrate and stir, cast into pre-placed molds, and obtain pure gold filling materials. Cut the pure gold filling material into small pieces, which is conve...

Embodiment 3

[0033] Firstly prepare the filling material, mix according to weight ratio, dysprosium 70.0%, indium 12.4%, zinc block 9.0%, cobalt powder 8.6%, cobalt powder average diameter is 20mm. Two metals, dysprosium and indium, are placed in a graphite crucible, and zinc block and cobalt powder are placed in the interlayer of the furnace top in two compartments. Vacuum to 5*10 after closing the furnace door -3 Pa, and then filled with argon, the pressure is 0.8 atmospheres. Melt the dysprosium-indium binary alloy in proportion under the protection of an inert atmosphere. The melting temperature reaches 1480°C to completely melt the binary alloy, then lower the power to reduce the melt temperature to 1120°C, quickly add zinc block and cobalt powder in sequence, and place the crucible Vibrate and stir, cast into pre-placed molds, and obtain pure gold filling materials. Cut the filling material into small pieces, which is convenient for batching.

[0034] The second step is to smelt h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
hardnessaaaaaaaaaa
hardnessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention provides a hard pure gold joint coating material and a preparation method thereof. The joint coating material comprises, by weight, 60-85% of dysprosium, 10-15% of indium, 0.5-10% of zinc, and 2-10% of cobalt, wherein the weight ratio of dysprosium to indium is 84-86:14-16. According to the hard pure gold joint coating material, the rare earth element dysprosium serves as the main strengthening element, the second phase hardened matter of dysprosium is Au4Dy, the melting temperature of dysprosium is decreased to 1100 DEG C by matching dysprosium with indium, the effect that dysprosium adapts to conventional noble metal jewelry melting techniques is guaranteed, by adding zinc, the liquidity of pure gold in the casting process is improved, and separation and nucleation of Au4Dy are facilitated through cobalt. According to the hard pure gold joint coating material and the preparation method thereof, the hardness of the pure gold reaches 69.3 Hv and 105.1 Hv or above in the cast state and the aging state correspondingly, and selection requirements of various jewelry materials are met.

Description

technical field [0001] The invention relates to the technical field of pure gold microalloy hardening, and specifically discloses a hard pure gold filling material and a preparation method thereof. Background technique [0002] At present, pure gold jewelry is still the first choice of Chinese people in the jewelry market, and the amount of pure gold also occupies a dominant position in the jewelry market. The mechanical performance of ordinary pure gold is relatively soft, and pure gold jewelry is prone to wear or deformation, which will weaken the appearance and brightness of jewelry. In inlaid jewelry such as jewelry and diamonds, pure gold is also often used as a bracket material, and its weak mechanical properties often lead to the loss of inlaid diamonds or gemstones. Therefore, on the premise of ensuring the fineness of pure gold, improving the hardness of pure gold, while taking into account the fluidity and processing performance during the preparation and processi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00C22C1/02C22C5/02C22C1/03C22F1/14
CPCC22C1/02C22C1/03C22C5/02C22C28/00C22F1/14
Inventor 金明江金学军左舜贵
Owner SHANGHAI JIAOTONG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com