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As-cast non-magnetic austenitic stainless steel and preparing method thereof

A technology of austenitic stainless steel and magnetic austenite, which is applied in the field of as-cast non-magnetic austenitic stainless steel and its preparation, can solve the problems of complex alloy composition, difficulty in popularization, and unspecified relative magnetic permeability, etc., and achieve reduction Relative magnetic permeability, saving time and improving economic benefits

Inactive Publication Date: 2020-08-11
襄阳市立强机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Regarding the preparation of non-magnetic austenitic stainless steel, the relevant patent results have problems such as too complex alloy composition and expensive melting equipment, which are not easy to promote, and there is no specific relative magnetic permeability.

Method used

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  • As-cast non-magnetic austenitic stainless steel and preparing method thereof
  • As-cast non-magnetic austenitic stainless steel and preparing method thereof
  • As-cast non-magnetic austenitic stainless steel and preparing method thereof

Examples

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Embodiment 1

[0034] The invention provides a cast non-magnetic austenitic stainless steel, comprising the following components and their mass percentages: C: 0.0347%, Si: 0.290%, Mn: 1.50%, P: 0.045%, S: 0.0063%, Cr : 18.39%, Ni: 9.60%, Mo: 0.0387%, Fe: 69.6903%.

[0035] A preparation method of as-cast non-magnetic austenitic stainless steel (melting in a 150kg intermediate frequency induction furnace), comprising the following steps (percentages are mass fractions):

[0036] (1) Add ordinary austenitic stainless steel scrap, die head material, industrial pure iron and nickel plate whose chemical composition meets the requirements;

[0037] (2) Add required ferromanganese when the molten steel temperature reaches 1560°C;

[0038] (3) Add a deoxidizer to deoxidize at a temperature of 1580°C;

[0039] (4) Sampling under the above-mentioned temperature carries out compositional analysis of molten steel, and correspondingly adjusts, and makes the mass percent of described each element be in...

Embodiment 2

[0045] The invention provides a cast non-magnetic austenitic stainless steel, comprising the following components and their mass percentages: C: 0.0335%, Si: 0.251%, Mn: 1.52%, P: 0.040%, S: 0.0048%, Cr : 18.62%, Ni: 9.80%, Mo: 0.0426%, Fe: 69.6881%.

[0046] A preparation method of as-cast non-magnetic austenitic stainless steel (melting in a 150kg intermediate frequency induction furnace), comprising the following steps (percentages are mass fractions):

[0047] (1) Add ordinary austenitic stainless steel scrap, die head material, industrial pure iron and nickel plate whose chemical composition meets the requirements;

[0048] (2) Add required ferromanganese when the molten steel temperature reaches 1560°C;

[0049] (3) Add a deoxidizer to deoxidize at a temperature of 1580°C;

[0050] (4) Sampling under the above-mentioned temperature carries out compositional analysis of molten steel, and correspondingly adjusts, and makes the mass percent of described each element be in d...

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Abstract

The invention provides as-cast non-magnetic austenitic stainless steel. The as-cast non-magnetic austenitic stainless steel comprises the following components including, by mass, 0.03%-0.05% of C, 0.20%-0.30% of Si, 1.50%-1.60% of Mn, less than or equal to 0.045% of P, less than or equal to 0.03% of S, 18.0%-18.5% of Cr, 9.5%-10.0% of Ni, less than or equal to 0.05% of Mo and the balance Fe. The preparing method of the as-cast non-magnetic austenitic stainless steel comprises the steps of medium-frequency induction furnace smelting and investment precision casting. The as-cast non-magnetic austenitic stainless steel has the advantages that the relative permeability mu r of the prepared austenitic stainless steel is 1.01, the requirement of a non-magnetic material (mu r is smaller than or equal to 1.02) can be met in an as-cast state, and the austenitic stainless steel has excellent mechanical property and corrosion resistance and is low in cost.

Description

technical field [0001] The invention relates to a cast non-magnetic austenitic stainless steel and a preparation method thereof, belonging to the technical field of stainless steel materials. Background technique [0002] Austenitic stainless steel has good mechanical properties, corrosion resistance and easy cold and hot forming properties, and has been widely used in chemical, petrochemical, aerospace, energy, transportation, biomedicine and other industries. With more and more fields of application of austenitic stainless steel, according to the different needs of various industries, it is necessary to study austenitic stainless steel materials that meet different use requirements. [0003] While many industries require the corrosion resistance of materials, they also put forward related requirements for other aspects of performance such as relative magnetic permeability. For example, the nuclear power industry requires the relative magnetic permeability μ of raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/44C22C38/58C22C33/06C21C7/06
CPCC21C7/06C22C33/06C22C38/02C22C38/44C22C38/58Y02P10/20
Inventor 陈涛范晓明王信伟李嘉臻文红艳
Owner 襄阳市立强机械有限公司