Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nonmagnetic steel product and manufacturing method thereof

A manufacturing method, the technology of non-magnetic steel, applied in the field of powder metallurgy, can solve the problems of unsatisfactory high cost performance in the market, unsatisfactory mechanical properties of non-magnetic steel, high process cost, etc., and achieve low cost, high product precision, and expansion The effect of the range of industrial applications

Active Publication Date: 2017-08-11
GUANGDONG YUEHAI HUAJIN TECH CO LTD
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of copper, the cost of the process remains high, which cannot meet the market's demand for cost-effective
And although the above-mentioned element powder can obtain high-density sintered non-magnetic products, the mechanical properties of non-magnetic steel are not ideal

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
  • Nonmagnetic steel product and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of manufacturing method of non-magnetic steel product (balance weight) of present embodiment, comprises the steps:

[0032] a) First, take the Fe-Mn pre-alloy powder, and add 4% activator and 0.3% graphite according to the weight percentage of the Fe-Mn pre-alloy powder, then add the Fe-Mn pre-alloy powder, activator, The paraffin-based wax powder binding agent of 1.2% of the total weight of graphite is evenly stirred with a powder mixer for subsequent use.

[0033] Wherein, the activator is FeB master alloy powder, wherein the weight percentage of the B powder is 20%;

[0034] The Fe-Mn pre-alloyed powder includes the following components by weight percentage: Mn 15%, C 1.2%, Si 0.7, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, and the balance is Fe.

[0035] b) Send the mixed mixed powder to an ordinary mechanical press for compression molding to make a green body of the balance weight, and the density is controlled at 5.8g / cm 3 .

[0036] c) Sintering the pressed gr...

Embodiment 2

[0040] A kind of manufacturing method of non-magnetic steel product (balance weight) of present embodiment, comprises the steps:

[0041] a) First, take the Fe-Mn pre-alloy powder, and add 3% activator and 0.5% graphite according to the weight percentage of the Fe-Mn pre-alloy powder, then add the Fe-Mn pre-alloy powder, activator, The paraffin-based wax powder binder of 0.9% of the total weight of graphite is stirred evenly with a powder mixer for subsequent use.

[0042] Wherein, the activator is FeB master alloy powder, wherein the weight percentage of the B powder is 15%;

[0043] The Fe-Mn pre-alloyed powder includes the following components by weight percentage: Mn 17%, C 0.9%, Si 1.0, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, and the balance is Fe.

[0044] b) Send the mixed mixed powder to an ordinary mechanical press for compression molding to make a green body of the balance weight, and the density is controlled at 6.0g / cm 3 .

[0045] c) Sintering the pressed green bod...

Embodiment 3

[0049]A kind of manufacturing method of non-magnetic steel product (balance weight) of present embodiment, comprises the steps:

[0050] a) First, take the Fe-Mn pre-alloy powder, and add 2% activator and 0.6% graphite according to the weight percentage of the Fe-Mn pre-alloy powder, then add the Fe-Mn pre-alloy powder, activator, The paraffin-based wax powder binder of 0.5% of the total weight of graphite is stirred evenly with a powder mixer for subsequent use.

[0051] Wherein, the activator includes FeB master alloy powder, wherein the weight percentage of the B powder is 25%;

[0052] The Fe-Mn pre-alloyed powder includes the following components by weight percentage: Mn 19%, C 0.6%, Si 0.8, S≤0.05%, P≤0.09%, Pb≤0.2%, Sn≤0.2%, and the balance is Fe.

[0053] b) Send the mixed mixed powder to an ordinary mechanical press for compression molding to make a green body of the balance weight, and the density is controlled at 6.2g / cm 3 .

[0054] c) Sintering the pressed gree...

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 relates to a nonmagnetic steel product and a manufacturing method thereof. The manufacturing method of the nonmagnetic steel product comprises the following steps: preparation of a green body: taking Fe-Mn prealloy powder, adding 2-4% of an activating agent and 0.3-0.6% of graphite, then adding a binder of which the weight is 0.5-1.2% of the total weight of the Fe-Mn prealloy powder, the activating agent and the graphite, and carrying out compression moulding after mixing to obtain the green body, wherein the activating agent comprises FeB master alloyed powder, and the weight percentage of B powder is 15-25%; and sintering: sintering the green body to obtain the nonmagnetic product. Use of raw materials with high price such as copper powder is avoided, the manufacturing cost of the nonmagnetic steel product is low, meanwhile, the nonmagnetic steel product with excellent performance is obtained, the tensile strength can reach 500 MP or above, and the elongation reaches up to 6% or above.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a non-magnetic steel product and a manufacturing method thereof. Background technique [0002] The relative permeability μ value of non-magnetic steel is slightly greater than 1. In the magnetic field, it is a low-magnetic steel material with very weak magnetization and basically no magnetic induction, so it is called non-magnetic steel. The structure of non-magnetic steel at room temperature is required to be stable austenite, while the structure of ferrite, pearlite and martensite is ferromagnetic at room temperature. High manganese non-magnetic steel is to expand the phase diagram of Fe-C alloy by adding manganese In the austenite zone, a stable single-phase austenite structure is obtained at room temperature. [0003] Industrially, high-manganese non-magnetic steel products are generally obtained by casting, and have obvious work hardening. For small parts with hig...

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
IPC IPC(8): C22C38/04C22C38/02C22C38/60C22C33/02
CPCC22C33/0278C22C38/008C22C38/02C22C38/04C22C38/60
Inventor 陈家坚朱权利刘艳肖刘军潘永汉
Owner GUANGDONG YUEHAI HUAJIN TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com