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Method for regulating and controlling two-phase proportion of cobalt-chromium-molybdenum alloy in laser additive manufacturing

A cobalt-chromium-molybdenum alloy, laser additive technology, applied in the field of additive manufacturing, can solve problems such as high cost and long heat treatment cycle, and achieve the effects of extending service life, eliminating heat treatment steps, and reducing brittle fracture tendency

Active Publication Date: 2021-07-13
SHANDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At present, the method to increase the content of Hcp phase in additively manufactured cobalt-chromium-molybdenum alloys is usually to carry out subsequent isothermal heat treatment in the range of 650~1050℃, but the subsequent heat treatment Long cycle and high cost

Method used

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  • Method for regulating and controlling two-phase proportion of cobalt-chromium-molybdenum alloy in laser additive manufacturing
  • Method for regulating and controlling two-phase proportion of cobalt-chromium-molybdenum alloy in laser additive manufacturing
  • Method for regulating and controlling two-phase proportion of cobalt-chromium-molybdenum alloy in laser additive manufacturing

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a laser additive manufacturing method for controlling the two-phase ratio of cobalt-chromium-molybdenum alloys includes the following steps:

[0036] Step 1001-1, obtaining a 3D model and slice files;

[0037] Use solidworks, UG and other software to build a 3D software model, and then use Simplify3D, Magics and other software to slice and generate a laser processing program for each layer. The thickness of the sliced ​​layer is 0.03mm.

[0038] Step 1002-1, substrate pretreatment;

[0039] First, the substrate is ground and polished with sandpaper. The substrate is made of 316 stainless steel or cobalt-chromium-molybdenum alloy. When grinding and polishing, use 80~3000# sandpaper. The parallelism tolerance after polishing is ≤0.01mm. Then, at a temperature of 30° C., put the substrate into acetone, ethanol and distilled water in sequence and use ultrasonic cleaning to remove oil and impurities, take it out and blow it dry.

[0040] Step 1...

Embodiment 2

[0048] Embodiment 2: In the present embodiment, its processing steps are as follows:

[0049] Step 1001-2, obtaining a 3D model and slice files;

[0050] Use solidworks, UG and other software to build a 3D software model, and then use Simplify3D, Magics and other software to slice and generate a laser processing program for each layer. The thickness of the sliced ​​layer is 0.03mm.

[0051] Step 1002-2, substrate pretreatment;

[0052] First, the substrate is sanded and polished with sandpaper to remove surface oil and impurities. The substrate is made of 316 stainless steel or cobalt-chromium-molybdenum alloy. When grinding and polishing, use 80~3000# sandpaper. The parallelism tolerance after polishing is ≤0.01mm. Then, at a temperature of 30° C., put the substrate into acetone, ethanol and distilled water in sequence and use ultrasonic cleaning to remove oil and impurities, take it out and blow it dry.

[0053] Step 1003-2, pretreatment of cobalt-chromium-molybdenum allo...

Embodiment 3

[0062] Step 1001-3, obtaining the 3D model and slice files;

[0063] Use solidworks, UG and other software to build a 3D software model, and then use Simplify3D, Magics and other software to slice and generate a laser processing program for each layer. The thickness of the sliced ​​layer is 0.03mm.

[0064] Step 1002-3, substrate pretreatment;

[0065] First, the substrate is sanded and polished with sandpaper to remove surface oil and impurities. The substrate is made of 316 stainless steel or cobalt-chromium-molybdenum alloy. When grinding and polishing, use 80~3000# sandpaper. The parallelism tolerance after polishing is ≤0.01mm. Then, at a temperature of 30° C., put the substrate into acetone, ethanol and distilled water in sequence and use ultrasonic cleaning to remove oil and impurities, take it out and blow it dry.

[0066] Step 1003-3, pretreatment of cobalt-chromium-molybdenum alloy powder;

[0067] The cobalt-chromium-molybdenum alloy powder is dried in a vacuum d...

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Abstract

The invention discloses a method for regulating and controlling the two-phase proportion of a cobalt-chromium-molybdenum alloy in laser additive manufacturing, and belongs to the technical field of additive manufacturing. The method is characterized by comprising the following steps that Step a, a three-dimensional part model is established, and slicing treatment is performed; Step b, the cobalt-chromium-molybdenum alloy powder is dried; Step c, before additive manufacturing, inert gas is introduced for protection; and Step d, additive manufacturing is carried out, in the additive manufacturing process, laser cladding is carried out on each layer of cobalt-chromium-molybdenum alloy powder at least once after preheating, cladding is carried out on the cobalt-chromium-molybdenum alloy powder layer by layer, and the cobalt-chromium-molybdenum alloy component is obtained. By means of the method for regulating and controlling the two-phase proportion of the cobalt-chromium-molybdenum alloy in laser additive manufacturing, the defect that in the prior art, the two-phase proportion of the cobalt-chromium-molybdenum alloy needs to be changed through follow-up heat treatment is overcome, the follow-up needed complicated heat treatment steps and corresponding heat treatment equipment can be omitted, the part preparation time is greatly shortened, the economic cost is greatly reduced, and the economic benefits of parts can be effectively improved.

Description

technical field [0001] The invention discloses a method for regulating the two-phase ratio of cobalt-chromium-molybdenum alloy produced by laser additive manufacturing, which belongs to the technical field of additive manufacturing. Background technique [0002] Laser additive manufacturing technology is based on the idea of ​​"discrete-stacking". Laser cladding combines rapid prototyping technology. Through three-dimensional modeling data, it is an advanced manufacturing technology that generates solid parts by layer-by-layer stacking. It has a cost Low, high material utilization, compact parts and other advantages. Cobalt-chromium-molybdenum alloys are widely used in laser additive manufacturing of artificial knee joints and hip joints with complex shapes and customized requirements due to their excellent wear resistance, corrosion resistance and good biocompatibility. and other artificial implants. [0003] According to the phase diagram, the cobalt-chromium-molybdenum ...

Claims

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Application Information

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IPC IPC(8): B22F10/28B22F10/85B22F10/366B33Y10/00B33Y50/02B33Y70/00B33Y80/00B33Y40/10
CPCB33Y10/00B33Y50/02B33Y70/00B33Y80/00B33Y40/10Y02P10/25
Inventor 方晓英娄殿军李昊卿夏维龙任雪彭
Owner SHANDONG UNIV OF TECH
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