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A high-strength corrosion-resistant non-magnetic stainless steel tool and its preparation method

A non-magnetic stainless steel, corrosion-resistant technology, applied in the field of alloys, can solve the problems of low strength, inapplicability, high magnetism, etc., and achieve the effects of good oxidation resistance, good pressure processing performance, good corrosion resistance and high temperature strength

Active Publication Date: 2018-05-08
HEBEI BOTOU SAFETY TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the common 304 stainless steel material on the market has high toughness and plasticity, its strength is low, and it is impossible to strengthen it through phase transformation.
Martensitic stainless steel is a type of stainless steel whose properties can be adjusted by heat treatment (quenching, tempering). Generally speaking, it is a type of hardenable stainless steel, but its magnetic properties are high and its corrosion resistance is not as good as that of austenite. Stainless steel is good, not suitable for the above environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare high-strength, corrosion-resistant, non-magnetic stainless steel tools as follows:

[0023] (1) Raw material steel strip is heated to 1550-1580°C, (for processed products, the mass ratio of new material and returned material in raw materials is 3:7, for polished products, the mass ratio of new material and returned material in raw materials 4:6) heating and melting, after all the raw materials are melted, add silicon and manganese for deoxidation;

[0024] (2) Add chromium and nickel elements according to the mass percentage at 1550-1580°C;

[0025] (3) Sampling at the above temperature for material composition analysis and adjustment, so that the mass percentage of each element mentioned is within the stated range;

[0026] (4) Raise the temperature to 1620-1630°C, add a special slag remover for stainless steel casting (mainly composed of silicon oxide) to remove slag;

[0027] (5) The molten steel after slag removal is maintained at a temperature of 1620-165...

Embodiment 2

[0031] The preparation method is the same as in Example 1, and the elements are composed of: C 0.06%, Si 0.77%, Mn 1.4%, Cr 18.1%, Ni 8.2%, S 0.02%, P 0.039%, N 0.15%, and the balance is Fe and unavoidable impurities.

Embodiment 3

[0033] The preparation method is the same as in Example 1, and the elements are composed of: C 0.06%, Si 0.79%, Mn 1.8%, Cr 20.0%, Ni 10.4%, S 0.02%, P 0.042%, N 0.15%, and the balance is Fe and unavoidable impurities.

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Abstract

The invention discloses a high-strength corrosion-resisting non-magnetic stainless steel tool. Stainless steel adopted in the high-strength corrosion-resisting non-magnetic stainless steel tool is prepared from, by mass, not larger than 0.08% of C, not larger than 0.85% of Si, 1.4%-1.8% of Mn, 18.0%-20.0% of Cr, 8.0%-10.5% of Ni, not larger than 0.03% of S, not larger than 0.045% of P, not larger than 0.2% of N and the balance Fe and inevitable impurities. A preparation method of the high-strength corrosion-resisting non-magnetic stainless steel tool comprises the steps that after raw materials are deoxidized, ingredients are adjusted, a blank is obtained through casting after residues are removed, the blank is forged and subjected to edge falling under specific conditions, natural cooling is carried out, and the high-strength corrosion-resisting non-magnetic stainless steel tool can be obtained. The stainless steel 304QF prepared by selecting the proper ingredient ratio and the preparation method has the advantage of martensite stainless steel and the advantage of austenitic stainless steel at the same time, magnetism is avoided, and high tenacity and plasticity are achieved; and good corrosion resistance and high-temperature strength, good oxidization resistance and good pressure processing performance are achieved.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a high-strength corrosion-resistant non-magnetic stainless steel tool and a preparation method thereof. Background technique [0002] Each of us lives in a magnetic field, such as geomagnetism and various radio electromagnetic wave magnetic fields. The general sense of the magnetic field environment refers to a strong magnetic field other than the above-mentioned magnetic fields (including small environments and large areas), such as: the vicinity of working motors, generators, transformers, high-voltage lines, mobile phone signal repeaters, etc., NMR The resonance studio is the magnetic field environment. Working in a strong magnetic field environment requires that the tools used must be non-magnetic. For example, in a nuclear magnetic resonance studio, if there are magnetic objects, they will be absorbed by the nuclear magnetic resonance equipment and damage the equipment, causing very s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/40C22C33/04
CPCC22C33/04C22C38/40C22C38/58
Inventor 杨景华韩亮
Owner HEBEI BOTOU SAFETY TOOLS CO LTD
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