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A method for manufacturing an ultra-low temperature high-strength non-magnetic stainless steel impeller shaft

A non-magnetic stainless steel and manufacturing method technology, applied in the field of impeller shaft manufacturing, can solve problems such as inability to meet multiple performance index requirements at the same time, achieve low magnetic permeability, scientific and reasonable design, and stable austenite structure

Active Publication Date: 2021-03-12
上海加宁新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing steel grades cannot meet the above-mentioned multiple performance index requirements at the same time

Method used

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  • A method for manufacturing an ultra-low temperature high-strength non-magnetic stainless steel impeller shaft
  • A method for manufacturing an ultra-low temperature high-strength non-magnetic stainless steel impeller shaft
  • A method for manufacturing an ultra-low temperature high-strength non-magnetic stainless steel impeller shaft

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Embodiment

[0023] Embodiment: This embodiment specifically relates to a manufacturing method of an ultra-low temperature, high-strength, non-magnetic stainless steel impeller shaft. The manufacturing method rationally designs the content of each component of the steel type and strictly controls the content of harmful elements during smelting to increase the strength of molten steel. Purity, and the step heating method is used to heat the steel ingot, so that it has high strength, low magnetic permeability and stable austenite structure at ultra-low temperature.

[0024] A method for manufacturing an ultra-low temperature, high-strength, non-magnetic stainless steel impeller shaft provided in this embodiment includes the following steps:

[0025] (1) Select high-quality raw materials: micro-carbon ferrochrome, nickel plate and metal manganese, among which the nickel plate is 0# nickel plate; then use 5%-7% dilute sulfuric acid to clean the above raw materials to remove the rust that may be...

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Abstract

The invention discloses a method for manufacturing an ultra-low temperature, high-strength, non-magnetic stainless steel impeller shaft, which comprises the following steps: selecting raw materials and performing purification treatment; cleaning the furnace and ladle; making the purified raw materials obtain the following mass percentage according to the specified ratio and process Steel ingot: C≤0.08%, 9.0%≤Mn≤11.5%, Si≤1.0%, S≤0.03%, P≤0.03%, 12.0%≤Cr≤14.0%, 9.0%≤Ni≤11.0%, 0.40%≤N ≤0.50%, the rest is Fe; the specified ratio refers to the ratio of each raw material, and the specified process refers to the process conditions in which the raw materials are smelted by EF, refined by VOD and electroslag remelted by ESR; Forgings are obtained by forging; solid solution heat treatment is performed on the forgings, and then low-temperature forging is carried out, and cold work is strengthened; finally, the impeller shaft is obtained by processing. The invention has the advantages of strictly controlling the content of harmful elements during smelting, and the produced impeller shaft has superior performances of high strength, extremely low magnetic permeability and stable austenite structure at ultra-low temperature.

Description

technical field [0001] The invention relates to the technical field of impeller shaft manufacturing, in particular to a method for manufacturing an ultra-low temperature, high-strength, non-magnetic stainless steel impeller shaft. Background technique [0002] With the rapid development of industries such as low-temperature superconductivity, electronic instruments, and ocean engineering, the service environment of steel materials is becoming increasingly complex. Some precision parts or special equipment may require materials to have good non-magnetic properties, corrosion resistance, oxidation resistance, and Mechanical properties, which require the design and development of special new varieties of non-magnetic stainless steel to meet different application requirements. Cryogenic steel and ultra-low temperature steel used to manufacture equipment and devices in the fields of nuclear fusion engineering, ocean engineering, liquid nitrogen, liquid helium, etc., require tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/02C22C33/04C21C7/06C21C7/068C21C7/10C21D8/00
CPCC21C7/06C21C7/068C21C7/10C21D8/005C21D2211/001C22C33/04C22C38/001C22C38/002C22C38/02C22C38/58
Inventor 陈菊生吴崇源简忠贤张健陈坚柳豪
Owner 上海加宁新材料科技有限公司
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