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A laser additive manufacturing process for k465 nickel-based superalloy structural parts

A nickel-based superalloy, laser additive technology, applied in the direction of additive processing, additive manufacturing, process efficiency improvement, etc., can solve problems such as difficult to prepare, to improve the overall toughness, suppress the appearance of micro cracks, reasonable process control Effect

Active Publication Date: 2019-06-11
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the large and complex structural parts of K465 nickel-based superalloy are difficult to prepare in the prior art, the object of the present invention is to provide a laser additive manufacturing process for structural parts of K465 nickel-based superalloy, which realizes the K465 alloy structural parts crack-free forming

Method used

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  • A laser additive manufacturing process for k465 nickel-based superalloy structural parts
  • A laser additive manufacturing process for k465 nickel-based superalloy structural parts
  • A laser additive manufacturing process for k465 nickel-based superalloy structural parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0035] (1) process parameter: each embodiment process parameter is as shown in table 2:

[0036] Table 2 process parameter table

[0037] Process parameters

Example 1

Example 2

Example 3

Comparative example 1

laser power

1600W

1600W

1800W

1000W

scanning speed

6mm / s

6mm / s

6mm / s

6mm / s

Powder feeding rate

1.0g / min

1.5g / min

2g / min

1.5g / min

scanning method

line scan

line scan

interlaced scanning

line scan

Overlap rate

40％

45％

50％

45％

[0038] (2) Laminated structure: 1 layer of K465 alloy and 2 layers of Stellite6 alloy are alternately stacked, such as figure 2 As shown, one layer of K465 superalloy is first formed, then two layers of Stellite 6 superalloy are formed, and then one layer of K465 superalloy is formed, and so on, and the parts with composite alloy structure are finally formed at one time. Such as image 3 As shown, there is no cra...

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Abstract

The invention discloses a laser additive manufacturing process for a K465 nickel-based high-temperature alloy structural part, and belongs to the technical field of laser additive manufacturing of high-temperature alloys. The forming process parameters of this process are: laser power 1300-1600W, scanning speed 3-6mm / s, powder feeding rate 1-2g / min, scanning method is linear scanning or interlaced scanning, overlapping rate 40%-50%. During the forming process, a laminated structure is used to control the formation and propagation of cracks. The laminated structure refers to the alternate arrangement of one layer of K465 superalloy and two layers of Stellite 6 superalloy to form a structural member. This process realizes the crack-free forming and manufacturing of K465 alloy structural parts.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing of superalloy structural parts, in particular to a laser additive manufacturing process for K465 nickel-based superalloy structural parts. Background technique [0002] Superalloys are widely used in aerospace, gas turbines and other fields. K465 alloy is a precipitation-strengthened and solid-solution-strengthened cast nickel-based superalloy. This alloy has high thermal strength and high temperature oxidation resistance. It is suitable for Manufacture of aero-engine turbine blades. Due to the variety and high content of alloy elements in the alloy, the formability of the alloy is poor. At present, this type of alloy components are mainly formed by casting process. For structural parts with very complex structures, casting cannot realize the overall one-time forming of the structure due to the inability to demould, and there are relatively large preparation problems. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05B22F3/105B33Y10/00
CPCC22C19/057B33Y10/00B22F10/00B22F10/25B22F12/17B22F10/36B22F10/366B22F10/50Y02P10/25
Inventor 赵吉宾赵宇辉王志国李论施凡姚超
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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