Mold shell of investment casting cobalt chromium molybdenum artificial joint implant and manufacturing method of mold shell

A technology for artificial joints and investment casting, which is used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of uneven fine grains, insufficient pouring of thin-walled parts, and a large number of pores in castings, so as to achieve uniform fine grains, The effect of improving the nucleation rate and reducing the scrap rate of pores

Inactive Publication Date: 2018-11-16
无锡范尼韦尔工程有限公司
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the method of obtaining fine grains by lowering the shell temperature and pouring temperature has the risk of insufficient pouring for thin-walled parts, and the fine grains obtained in this way are often uneven, and parts with thick parts are still Possibly coarse grains; pouring in an atmospheric environment or a vacuum environment with a protective atmosphere will result in a large number of pores on the casting

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
  • Mold shell of investment casting cobalt chromium molybdenum artificial joint implant and manufacturing method of mold shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: The formwork of an investment casting cobalt-chromium-molybdenum artificial joint implant provided by this embodiment includes a main body of the formwork, and the main body of the formwork includes two layers of cobalt aluminate surface layer 1, Back layer 2 and sealing layer 3, cobalt aluminate surface layer 1 includes silica sol, alumina powder, cobalt aluminate powder, defoamer, wetting agent, latex, wherein the mass ratio of alumina powder to silica sol is 4.35 , the mass ratio of cobalt aluminate to silica sol is 0.22, the mass ratio of defoamer to silica sol is 6ml / Kg, the mass ratio of wetting agent to silica sol is 2ml / Kg, and the mass ratio of latex to silica sol is 0.03 , wherein the active ingredient content of the cobalt aluminate powder is 35%, the mesh number of the alumina powder is 320 mesh, and the defoamer is set as an aliphatic amide defoamer, and the wetting agent is set as a polyoxyethylene wetting agent.

[0029] The back layer 2 inc...

Embodiment 2

[0038] Embodiment 2: The formwork of an investment casting cobalt-chromium-molybdenum artificial joint implant provided by this embodiment includes a main body of the formwork, and the main body of the formwork includes two layers of cobalt aluminate surface layer 1, Back layer 2 and sealing layer 3, cobalt aluminate surface layer 1 includes silica sol, alumina powder, cobalt aluminate powder, defoamer, wetting agent, latex, wherein the mass ratio of alumina powder to silica sol is 4.40 , the mass ratio of cobalt aluminate to silica sol is 0.28, the mass ratio of defoamer to silica sol is 7ml / Kg, the mass ratio of wetting agent to silica sol is 2.5ml / Kg, and the mass ratio of latex to silica sol is 0.04, wherein the active ingredient content of the cobalt aluminate powder is 35%, and the mesh number of the alumina powder is 320 mesh.

[0039] The back layer 2 includes silica sol, fused silica powder, zirconium powder, defoamer, latex, distilled water, wherein the mass ratio of...

Embodiment 3

[0048] Embodiment 3: The formwork of an investment casting cobalt-chromium-molybdenum artificial joint implant provided in this embodiment includes a main body of the formwork, and the main body of the formwork includes two layers of cobalt aluminate surface layer 1, Back layer 2 and sealing layer 3, cobalt aluminate surface layer 1 includes silica sol, alumina powder, cobalt aluminate powder, defoamer, wetting agent, latex, wherein the mass ratio of alumina powder to silica sol is 4.45 , the mass ratio of cobalt aluminate to silica sol is 0.35, the mass ratio of defoamer to silica sol is 8ml / Kg, the mass ratio of wetting agent to silica sol is 3ml / Kg, and the mass ratio of latex to silica sol is 0.05 , wherein the active ingredient content of the cobalt aluminate powder is 35%, and the mesh number of the alumina powder is 320 mesh.

[0049] The back layer 2 includes silica sol, fused silica powder, zirconium powder, defoamer, latex, distilled water, wherein the mass ratio of ...

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

No PUM Login to view more

Abstract

The invention discloses a mold shell of an investment casting cobalt chromium molybdenum artificial joint implant and a manufacturing method of the mold shell and relates to the technical field of metal processing. A mold shell main body is provided with two layers of cobalt chromium molybdenum surface layers; each cobalt chromium molybdenum surface layer is prepared from silica sol, aluminum oxide powder, cobalt aluminate powder, a de-foaming agent, a wetting agent and latex, wherein the mass ratio of the aluminum oxide powder to the silica sol is 4.35 to 4.45 and the mass ratio of cobalt aluminate to the silica sol is 0.22 to 0.35; the mass ratio of the de-foaming agent to the silica sol is 6 to 8ml / Kg; the mass ratio of the wetting agent to the silica sol is 2 to 3ml / Kg and the mass ratio of the latex to the silica sol is 0.03 to 0.05; aluminum oxide slurry containing the cobalt aluminate and the aluminum oxide powder have very high heat conduction performance, a double-surface-layer manner ensures the thickness of a high-heat-conduction layer, the super-cooling degree of metal liquid is increased and the nucleation rate is improved, so that the aim of thinning crystal grains isfinally realized; a certain amount of the latex is added into surface-layer slurry and back-layer slurry and the latex is burnt after being baked, so that a lot of pores are formed in the mold shell,the air permeability of the mold shell is increased and the air pore rejection rate of castings is reduced.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a mold shell of an investment casting cobalt-chromium-molybdenum artificial joint implant and a manufacturing method thereof. Background technique [0002] With the development of society and economy, people's awareness of medical health is getting stronger and stronger, and the demand for cobalt-chromium-molybdenum alloy artificial joint implants is also increasing. If artificial joints want to replace the function of joints, they have very high requirements on material performance. , requires higher strength and toughness. From a metallographic point of view, in order to achieve high strength and high toughness, parts need to have uniform and fine grains. But for cobalt-chromium-molybdenum alloy, the alloy does not have a phase transition point, and fine grains cannot be obtained through post-heat treatment; in addition, the cobalt aluminate grain refiner currently us...

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 Applications(China)
IPC IPC(8): B22C1/02B22C3/00B22C9/04B22C9/22
CPCB22C1/02B22C3/00B22C9/04B22C9/22
Inventor 张力李彦华赵志强
Owner 无锡范尼韦尔工程有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap