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Preparation method of hot-working-state cobalt-based alloy rod wire

A cobalt-based alloy and hot-working technology, which is applied to the preparation of hot-worked cobalt-based alloy rods and wires, and the field of hot-worked CoCrMo alloy rods and wires, can solve the problem of not being able to meet the production needs of domestic medical devices, affecting product promotion and application, Affect product quality and other problems, achieve uniform structure and mechanical properties, good strong-plastic matching, and achieve the effect of strength and plasticity

Active Publication Date: 2020-08-25
中科锐金山东钛业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cast CoCrMo alloy has a coarse structure, although the strength can be achieved by adjusting the size and volume fraction of carbides, but its plasticity and toughness are low
In addition, porosity and shrinkage cavities may be introduced during the casting process, affecting product quality
[0004] At present, there are few domestic research reports on the thermal processing of CoCrMo alloys, and there is no mature supply of deformed rods and wires in the market. As a result, the deformed CoCrMo alloy rods and wires used in the domestic medical industry are directly purchased from abroad, and the procurement cycle is long. Unable to meet the production needs of domestic medical devices, affecting the promotion and application of related products

Method used

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  • Preparation method of hot-working-state cobalt-based alloy rod wire
  • Preparation method of hot-working-state cobalt-based alloy rod wire
  • Preparation method of hot-working-state cobalt-based alloy rod wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, the chemical composition of the cobalt-based alloy is: Cr 28.0%, Mo 6.0%, Ni 0.6%, C 0.08%, Fe 0.5%, Si 0.3%, Mn 0.4%, N 0.27%, and the rest The amount is Co.

[0035] The preparation method of this cobalt-based alloy rod is as follows:

[0036] Step 1. Using metal Co, metal Cr, metal Mo, metal Ni, metal Fe, metal Mn, elemental Si and elemental C, according to the composition of the cobalt-based alloy, the vacuum induction melting and electroslag remelting process is used to prepare a Φ170mm diameter casting ingot.

[0037] Step 2: Carry out homogenization heat treatment on the cobalt-based alloy ingot: choose the homogenization heat treatment system at 1170° C., keep it warm for 20 hours, and air-cool to room temperature.

[0038] Step 3. Forging the homogenized heat-treated cobalt-based alloy ingot to Φ150mm: use an air hammer or a fast forging machine to forge the billet. The forging temperature is 1200°C, hold for 6 hours, and the final forging...

Embodiment 2

[0044] In this embodiment, the chemical composition of the cobalt-based alloy is: Cr 27.0%, Mo 6.5%, Ni 0.5%, C 0.06%, Fe 0.6%, Si 0.7%, Mn 0.6%, N 0.32%, and the rest The amount is Co.

[0045] The preparation method of this cobalt-based alloy rod is as follows:

[0046] Step 1. Using metal Co, metal Cr, metal Mo, metal Ni, metal Fe, metal Mn, elemental Si and elemental C, according to the composition of the cobalt-based alloy, the vacuum induction melting and electroslag remelting process is used to prepare a Φ170mm diameter casting ingot.

[0047] Step 2: Carry out homogenization heat treatment on the cobalt-based alloy ingot: select the homogenization heat treatment system at 1190° C., keep it warm for 10 hours, and air-cool to room temperature.

[0048]Step 3. Forging the homogenized heat-treated cobalt-based alloy ingot to Φ150mm: choose a fast forging machine for billet forging, the forging temperature is 1190°C, hold for 6 hours, and the final forging temperature is ...

Embodiment 3

[0055] In this embodiment, the chemical composition of the cobalt-based alloy is: Cr 29.0%, Mo 5.5%, Ni 0.4%, C 0.04%, Fe 0.3%, Si 0.1%, Mn 0.5%, N 0.16%, and the rest The amount is Co.

[0056] The preparation method of this cobalt-based alloy rod is as follows:

[0057] Step 1. Using metal Co, metal Cr, metal Mo, metal Ni, metal Fe, metal Mn, elemental Si and elemental C, according to the composition of the cobalt-based alloy, the vacuum induction melting and electroslag remelting process is used to prepare a Φ170mm diameter casting ingot.

[0058] Step 2: Perform homogenization heat treatment on the cobalt-based alloy ingot: select the homogenization heat treatment system as 1200° C., keep the temperature for 10 hours, and air-cool to room temperature.

[0059] Step 3: Forging the homogenized heat-treated cobalt-based alloy ingot to Φ150mm: choose a fast forging machine for billet forging, the forging temperature is 1200°C, hold for 6 hours, and the final forging temperat...

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Abstract

The invention belongs to the technical field of cobalt-based high-temperature alloy material processing, and particularly relates to a preparation method of a hot-working-state cobalt-based alloy rodwire, wherein the preparation method is particularly suitable for a hot-working-state CoCrMo alloy rod wire. An alloy is prepared from the chemical components in percentage by mass: 26.0-30.0% of Cr,5.0-7.0% of Mo, smaller than or equal to 1.0% of Ni, smaller than or equal to 0.14% of C, smaller than or equal to 0.75% of Fe, smaller than or equal to 1.0% of Si, smaller than or equal to 1.0% of Mn, smaller than or equal to 0.35% of N, and the balance of Co. An alloy cast ingot is obtained through vacuum induction melting and electroslag remelting firstly and then subjected to the processes ofhomogenization heat treatment, continuous multiple-heating-number high-temperature forging, straightening, surface working and the like, the qualified CoCrMo alloy rod wire is produced, and a qualified raw material is provided for manufacturing of medical devices.

Description

technical field [0001] The invention belongs to the technical field of processing cobalt-based high-temperature alloy materials, and in particular relates to a preparation method of hot-worked cobalt-based alloy rods and wires, and is particularly suitable for hot-worked CoCrMo alloy rods and wires. Background technique [0002] Cobalt-based alloys have excellent biocompatibility, corrosion resistance, wear resistance and fatigue properties, and are widely used in the medical field. CoCrMo alloy (nominal composition is Co-28Cr-6Mo) is a cobalt-based alloy that is widely used at present. It is used by foreign medical device companies such as Johnson & Johnson, Medtronic, and Smith Nephew to process various joints, artificial bones, orthopedic internal and external fixation parts, and spine. Internal fixation scoliosis linkages, and the manufacture of dentures, crowns, inlays and fixed bridges in dental restorations. [0003] Because the CoCrMo alloy has strong high temperatu...

Claims

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Application Information

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IPC IPC(8): C22C19/07C22C1/02C22F1/10B21C37/04B21J5/00
CPCB21C37/04B21J5/002C22C1/02C22C19/07C22F1/10
Inventor 柏春光张志强赵建杨锐
Owner 中科锐金山东钛业科技有限公司
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