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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 ab

Method used

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  • Nonmagnetic steel product and manufacturing method thereof

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Experimental program
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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...

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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

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Application Information

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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
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