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Martensitic stainless steel with high low-temperature impact

A martensitic stainless steel and low-temperature impact resistance technology, applied in the field of stainless steel, can solve the problems of low impact toughness and low comprehensive mechanical properties, and achieve the effects of improving impact toughness, improving comprehensive mechanical properties, and simple and convenient processing technology.

Inactive Publication Date: 2017-12-15
SUZHOU DOUBLE GOLD IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Stainless steel is often divided into: martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel and precipitation hardening stainless steel, etc., and 410 stainless steel is martensitic stainless steel One of the types, it is magnetic, has good hardenability after heat treatment, has high hardness, toughness, good corrosion resistance and machinability. Parts corroded by steam, water and oxidative acid, but the impact toughness of many martensitic stainless steels at low temperatures is not high, so their comprehensive mechanical properties are not high

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  • Martensitic stainless steel with high low-temperature impact

Examples

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Effect test

Embodiment 1

[0017] Example 1, a martensitic stainless steel with strong low-temperature impact, including the following components in mass percentage, C: 0.08%, Si: 0.01%, Mn: 0.01%, P: 0.01%, S: 0.01%, Cr: 11.5%, Ni: 0.8%, Mo: 0.2%, the balance is Fe and other impurities. The process steps of the quenching and tempering heat treatment process include: step one, quenching, heating the steel to be treated in a vertical heating furnace to 920°C and holding it for a period of time, and then rapidly cooling; step two, tempering, the quenched steel The vertical heating furnace is heated to 570℃ and kept for a period of time and then quickly cooled; step three, stress relief annealing, rough turning the tempered steel, and perform stress relief process, and then obtain the required heat-treated stainless steel material. The heating rate of the steel to be treated in the first step is less than 120°C / h, and the heating rate of the steel during tempering in the second step is less than 80°C / h.

Embodiment 2

[0018] Embodiment 2, a martensitic stainless steel with strong low-temperature impact, including the following components in mass percentages, C: 0.15%, Si: 1.0%, Mn: 1.0%, P: 0.04%, S: 0.03%, Cr: 13.5%, Ni: 1.2%, Mo: 0.4%, the balance is Fe and other impurities. The process steps of the quenching and tempering heat treatment process include: step one, quenching, heating the steel to be treated in a vertical heating furnace to 1000°C and holding it for a period of time, and then quickly cooling; step two, tempering, the quenched steel The vertical heating furnace is heated to 650°C and kept for a period of time and then quickly cooled; step three, stress relief annealing, rough turning the tempered steel, and performing stress relief procedures, and then obtain the required heat-treated stainless steel material. The heating rate of the steel to be treated in the first step is less than 120°C / h, and the heating rate of the steel during tempering in the second step is less than 8...

Embodiment 3

[0019] Example 3 includes the following components by mass percentage, C: 0.114%, Si: 0.34%, Mn: 0.42%, P: 0.021%, S: 0.01%, Cr: 12.01%, Ni: 0.84%, Mo: 0.22 %, the balance is Fe and other impurities. The process steps of the quenching and tempering heat treatment process include: step one, quenching, heating the steel to be treated in a vertical heating furnace to 970°C and holding it for a period of time, and then rapidly cooling; step two, tempering, the quenched steel The vertical heating furnace is heated to 605°C and kept for a period of time and then rapidly cooled; step three, stress relief annealing, rough turning the tempered steel, and perform stress relief procedures, and then obtain the required heat-treated stainless steel material. The heating rate of the steel to be treated in the first step is less than 120°C / h, and the heating rate of the steel during tempering in the second step is less than 80°C / h.

[0020] The various mechanical performance parameters of the ...

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Abstract

The invention discloses a martensitic stainless steel with strong low-temperature impact resistance, which comprises the following components by mass percentage, C: 0.08-0.15%, Si: less than or equal to 1.0%, Mn: less than or equal to 1.0%, P: less than or equal to 0.04%, S: less than or equal to 0.03%, Cr: 11.5-13.5%, Ni: 0.8-1.2%, Mo: 0.2-0.4%, and the balance is Fe and other impurities. The processing technology of the martensitic stainless steel with strong low-temperature impact is simple and convenient, and the cost of the production material is low, and can greatly improve the impact toughness of the steel at low temperature, improve the comprehensive mechanical properties, and can effectively improve its resistance. Acid-base corrosion ability, high practicability and economic benefit.

Description

Technical field: [0001] The invention relates to a martensitic stainless steel with strong low-temperature impact, and relates to the technical field of stainless steel. Background technique: [0002] Stainless steel is often divided into martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel, precipitation hardening stainless steel, etc. according to the state of organization, and 410 stainless steel is a martensitic stainless steel One of the types, it has magnetism, good heat treatment hardenability, high hardness, toughness, good corrosion resistance and machining performance. It is general-purpose steel, cutting tool steel, and can be used to manufacture resistance to atmosphere and water. Steam, water and oxidizing acid corroded parts, but the impact toughness of many martensitic stainless steels at low temperatures at present is not high, so their comprehensive mechanical properties are not high. Summary of the invention: [0003]...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C21D1/25C21D1/30
CPCC22C38/02C21D1/25C21D1/30C21D2211/008C22C38/002C22C38/04C22C38/44
Inventor 时金明
Owner SUZHOU DOUBLE GOLD IND
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