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Novel martensitic heat-resistant steel alloy powder and method for manufacturing laser additive with complex flow channel structure by using same

A technology of alloy powder and laser additive material, which is applied in the field of alloy powder, can solve problems such as inability to meet high temperature service requirements, poor casting structure performance, and high production difficulty, achieve excellent forming process performance, and avoid oxide slag inclusions, grains, etc. fine uniform effect

Active Publication Date: 2018-09-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, parts with complex flow channel structures are generally produced by casting or machining assembly methods, but for some extremely complex variable cross-section flow channels, casting and machining methods are more difficult to produce, and casting The performance of the structure is poor, and it cannot meet the high temperature service requirements. The machining assembly is mainly carried out by welding, and there are also similar cast weld structures.
All in all, traditional casting and machining cannot produce heat-resistant alloy parts with high-quality and high-performance complex flow channel structures. Therefore, it is proposed to use laser additive manufacturing to prepare complex flow channel structures. Due to the characteristics of additive manufacturing process on the material Constraints, the conventional alloy system cannot meet its formability and processability requirements, and it is necessary to optimize the composition of the alloy system

Method used

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  • Novel martensitic heat-resistant steel alloy powder and method for manufacturing laser additive with complex flow channel structure by using same
  • Novel martensitic heat-resistant steel alloy powder and method for manufacturing laser additive with complex flow channel structure by using same
  • Novel martensitic heat-resistant steel alloy powder and method for manufacturing laser additive with complex flow channel structure by using same

Examples

Experimental program
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Effect test

Embodiment 1

[0065] First, the ingredients are prepared according to the following proportions, including 0.07% carbon, 0.2% silicon, 0.5% manganese, 8.0% chromium, 1.5% tungsten, 0.4% molybdenum, 0.15% vanadium, 0.15% tantalum, 0.1% lanthanum and 0.2% cerium, the balance is iron.

[0066] Put the prepared metal manganese, metal chromium, metal tungsten, metal molybdenum, metal vanadium and metal iron into the intermediate frequency induction furnace, and heat it to melt, carbon block, raw material silicon, metal tantalum, metal lanthanum and metal cerium as supplementary materials Add, the temperature in the intermediate frequency induction furnace is controlled at 1520 ℃ when adding supplementary material. The configured carbon block, raw silicon and metal tantalum are sequentially added to the molten alloy solution. Deoxidation treatment is carried out by adding metal lanthanum and metal cerium, and the time of deoxidation treatment is 1 min. After the ingredients are adjusted to pass...

Embodiment 2

[0071] According to the method described in Example 1, parts with complex flow path structures are prepared. The difference from Example 1 is that the ingredients in this example are formulated according to the following target components, including 0.11% carbon, 0.4% silicon, 0.5% manganese, 9.1% chromium, 1.5% tungsten, 0.5% molybdenum, 0.2% vanadium, 0.15% tantalum, 0.1% lanthanum and 0.1% cerium, the balance being iron. During the preparation process of the new martensitic heat-resistant steel alloy powder, the temperature in the intermediate frequency induction furnace was controlled at 1500°C when the feeding material was added, the furnace temperature was 1450°C, the atomization pressure was 6MPa, and the drying temperature of the far-infrared dryer was 230°C. Then, the powder with a particle size ranging from 100 mesh to 350 mesh is screened out by a powder sieving machine as the finished powder. The above-mentioned finished powder is made into parts with complex flow...

Embodiment 3

[0074] According to the method described in Example 1, parts with complex flow path structures are prepared. The difference from Example 1 is that the ingredients in this example are formulated according to the following target components, including 0.15% carbon, 0.4% silicon, 0.5% manganese, 11.5% chromium, 1.5% tungsten, 0.6% molybdenum, 0.2% vanadium, 0.15% tantalum, 0.05% lanthanum and 0.05% cerium, the balance being iron. During the preparation process of the new martensitic heat-resistant steel alloy powder, the temperature in the intermediate frequency induction furnace was controlled at 1550°C when the feeding material was added, the furnace temperature was 1500°C, the atomization pressure was 8MPa, and the drying temperature of the far-infrared dryer was 235°C. Then, the powder with a particle size ranging from 100 mesh to 350 mesh is screened out by a powder sieving machine as the finished powder. The above finished powder is made into parts with complex channel str...

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Abstract

The invention relates to a novel martensitic heat-resistant steel alloy powder and a method for manufacturing a laser additive with a complex flow channel structure by using the same. The novel martensitic heat-resistant steel alloy powder comprises the following components in percentage by weight: 0.05-0.15% of carbon, 0.1-0.4% of silicon, 0.3-0.6% of manganese, 8.0-12.0% of chromium, 1.5-1.9% oftungsten, 0.1-0.8% of molybdenum, 0.1-0.3% of vanadium, 0.1-0.3% of tantalum, A% of lanthanum, B% of cerium and the balance of iron, wherein A is more than or equal to 0, B is more than or equal to0, and A+B is more than or equal to 0.05 and is less than or equal to 0.3. The novel martensitic heat-resistant steel alloy powder for manufacturing a laser additive, provided by the invention, has excellent forming process performance, the manufactured structure of the laser additive is a martensite+carbide structure, crystal grains are fine and uniform without a columnar crystal structure; and lanthanum and cerium are added to the alloy powder provided by the invention, so that not only can deoxidization be carried out during alloy forging, but also, by controlling the contents of lanthanumand cerium, the residual lanthanum and cerium will continue to play a role of deoxidizing and slagging in a micro-melting pool in a manufacturing process of the additive, so as to ensure that alloy elements are not oxidized and avoid the formation of oxide slag inclusion.

Description

technical field [0001] The invention relates to the technical field of alloy powders, in particular to a novel martensitic heat-resistant steel alloy powder and a method for laser additive manufacturing of complex channel structures using the same. Background technique [0002] At present, parts with complex flow channel structures are generally produced by casting or machining assembly methods, but for some extremely complex variable cross-section flow channels, casting and machining methods are more difficult to produce, and casting The performance of the structure is poor and cannot meet the high-temperature service requirements. Machining and assembly are mainly carried out by welding, and similar cast weld structures also exist. All in all, traditional casting and machining cannot produce heat-resistant alloy parts with high-quality and high-performance complex flow channel structures. Therefore, it is proposed to use laser additive manufacturing to prepare complex flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26B22F1/00B22F3/105B22F3/24B33Y70/00B33Y10/00
CPCB22F1/0003C22C38/005C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26B22F3/24B33Y10/00B33Y70/00B22F2003/248B22F2998/10B22F10/00B22F10/36B22F10/28B22F10/32B22F10/64Y02P10/25
Inventor 夏志新陈磊石拓张锐
Owner SUZHOU UNIV
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