Nitrogen-containing stainless steel, preparation method and use of parts

A technology for stainless steel and components, applied in the field of nitrogen-containing stainless steel and component preparation, can solve the problem that nitrogen-containing stainless steel is not suitable for additive manufacturing, and achieve the effect of improving process stability

Active Publication Date: 2022-04-08
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the technical problem that the existing nitrogen-containing stainless steel is not suitable for additive manufacturing in the prior art, the embodiment of the present invention provides a nitrogen-containing stainless steel, a method for preparing parts and its use

Method used

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  • Nitrogen-containing stainless steel, preparation method and use of parts
  • Nitrogen-containing stainless steel, preparation method and use of parts
  • Nitrogen-containing stainless steel, preparation method and use of parts

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preparation example Construction

[0052] In a second aspect, an embodiment of the present invention provides a method for preparing a nitrogen-containing stainless steel component, including:

[0053] The nitrogen-containing stainless steel is prepared into an ingot by induction furnace melting.

[0054] Further, the preparation method also includes:

[0055] The ingot is prepared into powder by nitrogen atomization;

[0056] The powder is machined into shape using an additive manufacturing process.

[0057] The above ingot was prepared into powder by nitrogen atomization. And carry out the qualification inspection on the powder composition, the qualified powder composition should meet the mass percentage range requirements of each composition in the above-mentioned nitrogen-containing stainless steel.

[0058] The nitrogen-containing stainless steel powder is processed into shape by an additive manufacturing process using nitrogen as a protective atmosphere. Unlike 316L and other stainless steels that use...

Embodiment 1

[0067] The nitrogen-containing stainless steel ingot is prepared by induction furnace melting, and the cross-sectional area perpendicular to the length direction of the ingot is about 80 square centimeters. The induction furnace smelting method is vacuum smelting, and the ingot is cooled and shaped by a metal mold. The surface of the above-mentioned ingot is cleaned, and the cleaning method includes grinding and lathe processing. The above ingot was prepared into powder by nitrogen atomization. And conduct qualification inspection on the powder components, wherein, the mass fraction of each component in the powder is C 0.04%, Si0.4%, Mn 6.8%, Ni 10.3%, Cr 18.7%, Mo 1.4%, N 0.09%, V 0.29 %, Nb 0.32%, and the balance is Fe; the powder composition meets the technical requirements of the nitrogen-containing stainless steel powder of the present invention. The nitrogen-containing stainless steel powder is processed into shape by an additive manufacturing process using nitrogen as...

Embodiment 2

[0069] The main difference between this example and Example 1 is that the mass fraction of each component in the powder is C 0.08%, Si0.2%, Mn6.9%, Ni 10.8%, Cr 18.2%, Mo 1.0%, N 0.17%, V 0.26%, Nb 0.34% and the balance of Fe, the powder components meet the technical requirements of the nitrogen-containing stainless steel powder of the present invention. Tensile stress-strain curve reference for additively manufactured specimens figure 2 As shown, the alloy has excellent tensile strength and plasticity.

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Abstract

In order to solve the technical problem in the prior art that the existing nitrogen-containing stainless steel is not suitable for additive manufacturing, the embodiment of the present invention provides a nitrogen-containing stainless steel, a method for preparing parts and its use; nitrogen-containing stainless steel uses iron as a matrix element, including Alloying elements in the following mass fractions: C 0.02‑0.09%, Si 0.2‑0.5%, Mn 6.5‑7.5%, Ni 10‑11%, Cr 18‑19%, Mo 0.9‑1.5%, N 0.08‑0.18%, V 0.25-0.35% and Nb 0.25-0.35%; the component preparation method includes preparing the nitrogen-containing stainless steel into an ingot by means of induction furnace melting. Use of the nitrogen-containing stainless steel or the ingot prepared by the preparation method in additive manufacturing. The embodiments of the present invention improve the process stability of nitrogen-containing stainless steel in the process of additive manufacturing through the reasonable collocation of various elements, and realize the short-process integrated forming of nitrogen-containing stainless steel with high plasticity and toughness.

Description

technical field [0001] The invention relates to a nitrogen-containing stainless steel, a preparation method and application of parts. Background technique [0002] Nitrogen-containing stainless steel introduces nitrogen as one of the main alloying elements to stabilize austenite, which reduces the use of relatively expensive Ni elements; in addition, nitrogen has little effect on plasticity and toughness. Body stainless steel has a significant solid solution strengthening effect. Benefiting from economic advantages and performance advantages, nitrogen-containing stainless steel has been widely used in industrial fields. [0003] Metal additive manufacturing has significant advantages in the integrated forming of high-performance complex structural parts, and is currently widely used in AlSi10Mg aluminum alloys, TC4 titanium alloys, 316L stainless steel and other materials. However, there is currently little research work on additive manufacturing for nitrogen-containing st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/44C22C38/46C22C38/48C22C38/58B22D7/00B33Y70/00C22C33/04
CPCC22C38/02C22C38/58C22C38/44C22C38/46C22C38/48C22C38/001C22C33/04B22D7/00B33Y70/00
Inventor 王国伟沈显峰杨家林王超秦煜李君黄姝珂
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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