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A kind of 03cr13ni5co9mo5 stainless steel material and its laser melting deposition forming method

A laser melting deposition, stainless steel technology, applied in the direction of additive manufacturing, process efficiency improvement, energy efficiency improvement, etc., can solve problems such as crack deformation

Active Publication Date: 2019-11-29
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a laser melting deposition forming method for 03Cr13Ni5Co9Mo5 stainless steel, which replaces forging and forming ultra-high-strength steel to manufacture key load-bearing parts, and solves the problem that ultra-high-strength steel materials are prone to cracks and deformations during laser melting deposition large volume problems,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A 03Cr13Ni5Co9Mo5 stainless steel material, the mass content of each main component is: 13.10% Cr element, 5.84% Ni element, 4.29% Mo element, 8.67% Co element, 0.022% C element, 0.29% Si element , 0.36% Mn element, the rest is Fe element.

[0021] A kind of 03Cr13Ni5Co9Mo5 stainless steel fusion deposition forming method, the steps of the method comprising:

[0022] (1) Mix the component distribution ratio of the stainless steel material, after mixing evenly, carry out vacuum smelting and rolling to obtain a bar;

[0023] (2) Carrying out gas atomization pulverization to the bar material obtained in step (1) to obtain a powder, the particle size of which is 75 μm to 187 μm;

[0024] (3) Carrying out laser melting deposition forming to the powder obtained in step (2), obtaining the 03Cr13Ni5Co9Mo5 stainless steel material whose shape meets the requirements;

[0025] (4) Perform annealing treatment on the 03Cr13Ni5Co9Mo5 stainless steel material whose shape meets the r...

Embodiment 2

[0032] A 03Cr13Ni5Co9Mo5 stainless steel material, the mass content of each main component is: 13.16% Cr element, 5.94% Ni element, 4.24% Mo element, 8.43% Co element, 0.033% C element, 0.27% Si element , 0.45% Mn element, the rest is Fe element.

[0033] A fused deposition forming method for 03Cr13Ni5Co9Mo5 stainless steel. 03Cr13Ni5Co9Mo5 stainless steel components were prepared using the process parameters of laser power 2800W, scanning speed 1000mm / min, scanning distance 2.5mm, powder feeding amount 30g / min, and layer thickness 1mm, and then kept at 510°C for 5h, then air-cooled.

[0034] The mechanical properties of the obtained stainless steel components were tested using the same batch of samples. The test methods were GB / T228.1 and GB / T229. The test results showed that the tensile strength at room temperature reached 1594MPa-1599MPa, the yield strength reached 1395MPa-1414MPa, and the elongation Reach 14.6% ~ 15.6%, impact toughness reaches 52J ~ 55J.

Embodiment 3

[0036] A 03Cr13Ni5Co9Mo5 stainless steel material, the mass content of each main component is: 13.34% Cr element, 5.72% Ni element, 4.47% Mo element, 8.60% Co element, 0.027% C element, 0.48% Si element , 0.37% Mn element, the rest is Fe element.

[0037] A fused deposition forming method for 03Cr13Ni5Co9Mo5 stainless steel, using laser power of 2600W, scanning speed of 900mm / min, scanning distance of 2mm, powder feeding amount of 25g / min, and layer thickness of 0.7mm to prepare 03Cr13Ni5Co9Mo5 stainless steel components, and then heat preservation at 480°C for 5h , air cooled.

[0038] The mechanical properties of the obtained stainless steel components were tested with the same batch of samples. The test methods were GB / T228.1 and GB / T229. The test results showed that the tensile strength at room temperature reached 1563MPa-1596MPa, the yield strength reached 1382MPa-1409MPa, and the elongation It reaches 15.2%~16.2%, and the impact toughness reaches 50J~55J.

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Abstract

The invention discloses a 03Cr13Ni5Co9Mo5 stainless steel material and a laser melting deposition forming method thereof. The chemical composition (mass fraction) of the alloy is: 12.5%-13.5% Cr element, 4.5%-6.0% Ni element, 4.0%-5.0% Mo element, 8.0%-9.0% Co element, 0-0.04% C element, 0‑0.5% Si element, 0‑0.7% Mn element, and the rest is Fe element. First, vacuum smelting and gas atomization pulverization are carried out to obtain alloy powder with a particle size of 75 μm-187 μm. Laser melting deposition process parameters are: laser power 2600W ~ 3000W, scanning distance 2mm ~ 2.5mm, scanning speed 800mm / min ~ 1100mm / min, powder feeding amount 20g / min ~ 30g / min, layer thickness 0.7mm ~ 1mm. The formed components are annealed, kept at 450°C to 560°C for 2h to 4h, and air cooled. After the above heat treatment, the tensile strength at room temperature exceeds 1550MPa, the yield strength is not less than 1350MPa, the elongation is not less than 10%, and the impact toughness (KU2) is not less than 45J. It can be used to replace forged ultra-high-strength steel to meet the key bearing capacity of some aerospace Requirements for quick and direct manufacturing of components at low cost.

Description

technical field [0001] The invention relates to a 03Cr13Ni5Co9Mo5 stainless steel material and a laser melting deposition forming method thereof, belonging to the technical field of metal forming. Background technique [0002] Compared with the existing Long March series engines, my country's new generation of liquid oxygen / kerosene high-pressure supplementary combustion engines has doubled the thrust. For key load-bearing components such as the engine's constant flat ring frame, the currently selected 1200MPa-grade 30CrMnSiA high-strength steel can no longer meet the development needs; and the current 1500MPa-grade ultra-high-strength steel has increased the types and contents of metal alloy elements. Cracks and large deformations are prone to occur during the laser melting deposition forming process. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a laser melting deposition forming method for 03Cr13Ni5Co9Mo5 s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/52C22C38/02C22C38/04B22F9/08B22F3/105B22F3/24C21D1/26C21D6/00
CPCC21D1/26C21D6/004C21D6/005C21D6/007C21D6/008C22C38/02C22C38/04C22C38/44C22C38/52B22F3/24B22F9/082B22F2003/248B22F10/00B22F10/25B22F10/36B22F10/64B22F10/366Y02P10/25
Inventor 李护林杨欢庆周亚雄宋梦华王琳雷玥陈振宇
Owner XIAN SPACE ENGINE CO LTD
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