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A kind of niobium-containing 420 stainless steel material and its preparation method and application

A technology of stainless steel and mixed raw materials, which is used in transportation and packaging, metal processing equipment, surgical forceps, etc., can solve the problems of many surface and internal voids, affecting product qualification rate, and high process control requirements. It can improve the sintering window and inhibit liquid Phasor generation, the effect of widening the sintering window

Active Publication Date: 2022-03-15
湖南英捷高科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art, the following problems still exist in the preparation process of injection molding 420 stainless steel: 1. The sintering window in the forming process is very narrow (the sintering window is only about 10°C), which requires high process control and high defect rate
2. When the powder injection molding process is used, due to the need for green body degreasing treatment, it is easy to cause more surface and internal voids and lower green body strength
After the sintering is completed, the surface roughness is relatively large, which also greatly affects the product qualification rate and increases the processing cost

Method used

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  • A kind of niobium-containing 420 stainless steel material and its preparation method and application
  • A kind of niobium-containing 420 stainless steel material and its preparation method and application
  • A kind of niobium-containing 420 stainless steel material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mix niobium-containing master alloy (420+Nb) powder with a median particle size of 12.5 microns and 2.5 micron iron powder at a mass ratio of niobium-containing master alloy powder to iron powder of 2.6:1 to obtain mixed raw material powder , and then mix the mixed raw material powder with the wax-based binder, the mass ratio of the mixed raw material powder to the binder is 57.86:42.14, the internal mixer is used for mixing, the mixing temperature is 150 ° C, the internal mixer speed The mixing time is 60r / min, the mixing time is 1.5h, and the feeding material is made after cooling and crushing.

[0044] Put the prepared feed into the BOY50T injection molding machine, the injection temperature is 155°C, the injection pressure is 60Mpa, the mold temperature is controlled at room temperature -50°C, and the blank is injection molded.

[0045] Then place the blank in a dichloromethane solvent to dissolve the paraffin and vegetable oil components; then put the dried blank i...

Embodiment 2

[0048] Mix niobium-containing master alloy (420+Nb) powder with a median particle size of 12.5 microns and 2.5 micron iron powder at a mass ratio of niobium-containing master alloy powder to iron powder of 2.6:1 to obtain mixed raw material powder , and then mix the mixed raw material powder with the wax-based binder, the mass ratio of the mixed raw material powder to the binder is 57.86:42.14, the internal mixer is used for mixing, the mixing temperature is 150 ° C, the internal mixer speed The mixing time is 60r / min, the mixing time is 1.5h, and the feeding material is made after cooling and crushing.

[0049] Put the prepared feed into the BOY50T injection molding machine, the injection temperature is 155°C, the injection pressure is 60Mpa, the mold temperature is controlled at room temperature -50°C, and the blank is injection molded.

[0050] Then place the blank in a dichloromethane solvent to dissolve the paraffin and vegetable oil components; then put the dried blank i...

Embodiment 3

[0053] Mix niobium-containing master alloy (420+Nb) powder with a median particle size of 12.5 microns and 2.5 micron iron powder at a mass ratio of niobium-containing master alloy powder to iron powder of 2.6:1 to obtain mixed raw material powder , and then mix the mixed raw material powder with the wax-based binder, the mass ratio of the mixed raw material powder to the binder is 57.86:42.14, the internal mixer is used for mixing, the mixing temperature is 150 ° C, the internal mixer speed The mixing time is 60r / min, the mixing time is 1.5h, and the feeding material is made after cooling and crushing.

[0054] Put the prepared feed into the BOY50T injection molding machine, the injection temperature is 155°C, the injection pressure is 60Mpa, the mold temperature is controlled at room temperature -50°C, and the blank is injection molded.

[0055] Then place the blank in a dichloromethane solvent to dissolve the paraffin and vegetable oil components; then put the dried blank i...

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Abstract

The invention discloses a niobium-containing 420 stainless steel material and its preparation method and application. The niobium-containing master alloy powder with different particle sizes is mixed with iron powder in a certain ratio to obtain the mixed raw material powder, and then the mixed raw material powder is combined with the bonding The raw material is mixed and mixed to obtain the feeding material, and the feeding material is injection-molded to obtain a green body, which is degreased to treat the green body, and the green body is first subjected to ultrasonic treatment, and then sintered to obtain the niobium-containing 420 stainless steel material; the present invention adopts powder injection Forming technology to prepare minimally invasive surgical instrument parts, through the combination of coarse and fine powder, can effectively widen the sintering window of the material, increase the density, and control the surface finish of the product within the range of Ra0.1, eliminating the need for subsequent processing and shaping , improving the conversion efficiency of blade airflow.

Description

technical field [0001] The invention relates to a niobium-containing 420 stainless steel material and a preparation method and application thereof, belonging to the field of stainless steel material preparation. Background technique [0002] With the continuous improvement of the level of medical treatment of diseases, the limitations of the traditional open surgical treatment model are gradually revealed. Minimally invasive surgery has the characteristics of small incisions and fast recovery, and has become an important trend in the development of the 21st century. Minimally invasive surgery is performed with related instruments with miniature cameras. During the operation, a cold light source is used to provide illumination, a lens with a diameter of about 10mm is inserted into the cavity, and digital camera technology is used to display the images captured by the lens on a special monitor. superior. The doctor analyzes and judges the patient's condition through the image...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02C22C38/02C22C38/04C22C38/44C22C38/48B22F1/107B22F3/22B22F5/00A61B17/29A61L31/02
CPCC22C33/0285C22C33/0207C22C38/02C22C38/04C22C38/48C22C38/44C22C38/001B22F3/225B22F5/00A61B17/29A61L31/022B22F2998/10B22F1/102B22F1/108B22F3/10B22F2202/01B22F3/1021
Inventor 何浩李益民陈永志王俊峰余勇胡幼华
Owner 湖南英捷高科技有限责任公司
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