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

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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 proce

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

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0033] Example 1

[0034] In this embodiment, the chemical composition of the cobalt-based alloy is as follows by mass percentage: Cr 28.0%, Mo 6.0%, Ni 0.6%, C0.08%, Fe 0.5%, Si 0.3%, Mn 0.4%, N 0.27%, and more The amount is Co.

[0035] The preparation method of the cobalt-based alloy bar 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 ingredients of the cobalt-based alloy, vacuum induction melting and electroslag remelting process are used to prepare Φ170mm diameter cast ingot.

[0037] Step two, homogenizing heat treatment of the cobalt-based alloy ingot: the homogenizing heat treatment system is selected to be 1170°C, the temperature is kept for 20 hours, and it is air-cooled to room temperature.

[0038] Step 3: Open and forge the cobalt-based alloy ingot with homogenization heat treatment to Φ150mm: use an air hammer or a fast forging machine to open and forge, the forging temperatu...

Example Embodiment

[0043] Example 2

[0044] In this embodiment, the chemical composition of the cobalt-based alloy is as follows by mass percentage: Cr 27.0%, Mo 6.5%, Ni 0.5%, C0.06%, Fe 0.6%, Si 0.7%, Mn 0.6%, N 0.32%, and the remaining The amount is Co.

[0045] The preparation method of the cobalt-based alloy bar is as follows:

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

[0047] Step 2: Homogenizing heat treatment on the cobalt-based alloy ingot: The homogenizing heat treatment system is selected at 1190°C, the temperature is kept for 10 hours, and the air cools to room temperature.

[0048] Step 3: Open blank forging of the cobalt-based alloy ingot with homogenization heat treatment to Φ150mm: a fast forging machine is used for blank forging, the fo...

Example Embodiment

[0054] Example 3

[0055] In this embodiment, the chemical composition of the cobalt-based alloy is as follows by mass percentage: Cr 29.0%, Mo 5.5%, Ni 0.4%, C0.04%, Fe 0.3%, Si 0.1%, Mn 0.5%, N 0.16%, and more The amount is Co.

[0056] The preparation method of the cobalt-based alloy bar is as follows:

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

[0058] Step 2: Homogenizing heat treatment on the cobalt-based alloy ingot: The homogenizing heat treatment system is selected at 1200°C, the temperature is kept for 10 hours, and the air cools to room temperature.

[0059] Step 3: Open billet forging the cobalt-based alloy ingot with homogenization heat treatment to Φ150mm: use a fast forging machine for billet forging, the 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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