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Cobalt-chromium alloy for finger ring and preparation method of cobalt-chromium alloy

A technology of cobalt-chromium alloy and ring, applied in the field of cobalt-chromium alloy, can solve the problems of poor toughness and plasticity, poor toughness and plasticity, and high production cost of cobalt-chromium alloy, so as to improve plasticity and toughness, good plasticity and bending strength. , the effect of reducing hardness

Pending Publication Date: 2022-05-27
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Cobalt-chromium alloy is a commonly used material, widely used in aerospace, biomedical and other fields; cobalt-chromium alloy used in aerospace and biomedical has good wear resistance and hardness, but poor toughness and plasticity; The commonly used materials for rings are some precious metals such as gold, silver, platinum, etc., and the production cost is high, but cobalt-chromium alloy has good wear resistance and gloss, and the cost is low; however, cobalt-chromium alloy has poor toughness and plasticity at present. Therefore, it is urgent to design a cobalt-chromium alloy that can improve toughness and plasticity, so that it can replace gold, silver, platinum and other precious metals in the application of ring rings

Method used

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  • Cobalt-chromium alloy for finger ring and preparation method of cobalt-chromium alloy
  • Cobalt-chromium alloy for finger ring and preparation method of cobalt-chromium alloy
  • Cobalt-chromium alloy for finger ring and preparation method of cobalt-chromium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method for a ring ring cobalt-chromium alloy, comprising the following steps;

[0023] 1) Weigh the alloy components, and weigh 25.0wt.% of Cr, 0.5wt.% of Mo, 0.5wt.% of Mn, 0.2wt.% of Fe, 0.1wt.% of Ti, 0.15wt.% C, the balance being Co;

[0024] 2), carry out vacuum smelting with the alloy composition weighed in step 1), and then carry out casting at 1450 ℃ temperature to obtain casting embryo;

[0025] 3), heat treatment, the obtained billet is kept at 1200°C for 1 hour, quenched to room temperature with water, then kept at 700°C for 2 hours, and quenched with water to room temperature to obtain a cobalt-chromium alloy for a ring of the present invention;

[0026] 4), the cobalt-chromium alloy is obtained through the above steps, the range of each phase structure is: FCC phase 45%±2%, HCP phase 55%±2%; the range of flexural strength is: 1950MPa±20MPa; microstructure see figure 1 shown.

Embodiment 2

[0028] A preparation method for a ring ring cobalt-chromium alloy, comprising the following steps;

[0029] 1) Weigh the alloy components, and weigh 25.0wt.% of Cr, 0.5wt.% of Mo, 0.5wt.% of Mn, 0.2wt.% of Fe, 0.1wt.% of Ti, 0.15wt.% C, the balance being Co;

[0030] 2), carry out vacuum smelting with the alloy composition weighed in step 1), and then carry out casting at 1600 ℃ temperature to obtain casting embryo;

[0031] 3), heat treatment, the obtained casting billet is kept at 1400 ° C for 1 hour, quenched to room temperature with water, then kept at 900 ° C for 2 hours, and quenched with water to room temperature to obtain a cobalt-chromium alloy for a ring of the present invention;

[0032] 4), the cobalt-chromium alloy is obtained through the above steps, the range of each phase structure is: FCC phase 50%±2%, HCP phase 50%±2%; the range of flexural strength is: 1900MPa±20MPa; microstructure see figure 2 shown.

Embodiment 3

[0034] A preparation method for a ring ring cobalt-chromium alloy, comprising the following steps;

[0035] 1) Weigh the alloy components, and weigh 30.0wt.% of Cr, 5.0wt.% of Mo, 1.5wt.% of Mn, 1.0wt.% of Fe, 0.6wt.% of Ti, 0.35wt.% C, the balance being Co;

[0036] 2), carry out vacuum smelting with the alloy composition weighed in step 1), and then carry out casting at 1500 ℃ temperature to obtain casting embryo;

[0037] 3), heat treatment, the obtained billet is kept at 1200°C for 1 hour, quenched to room temperature with water, then kept at 700°C for 2 hours, and quenched with water to room temperature to obtain a cobalt-chromium alloy for a ring of the present invention;

[0038] 4), the cobalt-chromium alloy is obtained through the above steps, the range of each phase structure is: FCC phase 51%±2%, HCP phase 49%±2%; the range of flexural strength is: 2400MPa±40MPa; microstructure see image 3 shown.

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Abstract

The invention relates to a cobalt-chromium alloy for a ring. The cobalt-chromium alloy comprises the following components in percentage by weight: 25.0 to 30.0 percent of Cr, 0.5 to 5.0 percent of Mo, 0.5 to 1.5 percent of Mn, 0.2 to 1.0 percent of Fe, 0.1 to 0.6 percent of Ti, 0.15 to 0.35 percent of C and the balance of Co. The invention further relates to a preparation method of the cobalt-chromium alloy for the finger ring, the preparation method comprises the working procedures of alloy component weighing, smelting, casting and heat treatment, the cobalt-chromium alloy for the finger ring and the preparation method of the cobalt-chromium alloy for the finger ring have the advantages of excellent plasticity and bending strength, low production cost and wide process window, and the cobalt-chromium alloy for the finger ring and the preparation method of the cobalt-chromium alloy for the finger ring are suitable for industrial production. And the method has a huge application prospect.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and relates to a cobalt-chromium alloy used for a ring. Background technique [0002] Cobalt-chromium alloy is a commonly used material, widely used in aerospace, biomedical and other fields; cobalt-chromium alloy used in aerospace and biomedical has good wear resistance and hardness, but poor toughness and plasticity; The commonly used materials for ring rings are some precious metals such as gold, silver and platinum, which have high production costs, but cobalt-chromium alloys have good wear resistance and gloss, and the cost is low; however, cobalt-chromium alloys currently have poor toughness and plasticity. Therefore, it is urgent to design a cobalt-chromium alloy that can improve toughness and plasticity, so that it can replace the application of precious metals such as gold, silver, and platinum in rings. SUMMARY OF THE INVENTION [0003] The purpose of the present in...

Claims

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Application Information

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IPC IPC(8): C22C19/07C22C1/02C22F1/10
CPCC22C19/07C22C1/02C22F1/10C22F1/002Y02P10/25
Inventor 宋成浩吴文源张振山孙振忠王皓亮马百胜
Owner DONGGUAN UNIV OF TECH
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