Single crystal welding of directionally solidified materials

A technology of directional crystallization and crystallization, which is applied in the field of single crystal welding of directional crystalline materials, and can solve problems such as wrong orientation

Inactive Publication Date: 2012-07-18
SIEMENS AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cause of misorientation in the SX microstructure during powder overlay welding of γ'-strengthened SX Ni-based superalloys is not yet fully understood

Method used

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  • Single crystal welding of directionally solidified materials
  • Single crystal welding of directionally solidified materials
  • Single crystal welding of directionally solidified materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] exist figure 1 The flow of the method is shown schematically with the aid of device 1 .

[0015] Components 120, 130 to be repaired have properties made of superalloys, in particular according to Figure 4 A substrate made of a nickel-based superalloy 4 . In particular, the substrate 4 consists entirely of a nickel-based superalloy. The substrate 4 is repaired by applying new material 7 to the surface 5 of the substrate 4 by overlay welding, in particular by means of powder.

[0016] This is achieved by supply material 7 and a welding beam, preferably a laser beam 10 of a laser, which melts at least the supplied material 7 and preferably also partially melts the substrate 4 . Here, powders are preferably used. The diameter of the powder particles 7 is preferably so small that the laser beam completely melts them and achieves a sufficiently high temperature of the particles 7 . During welding, there is a melted region 16 on the substrate 4 , a solidification front 1...

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Abstract

The invention relates to the targeted selection of process parameters for laser welding, feeding, laser power beam diameter, and powder mass flow, wherein the temperature gradient substantially decisive for single crystal growth during laser application welding can be set deliberately.

Description

technical field [0001] The invention relates to a welding method of directional crystallized metal materials. Background technique [0002] γ’-strengthened SX nickel-based superalloys cannot be overlaid in one or more layers with the same type of additive material in overlapping welding tracks by neither conventional welding methods nor high-energy methods (laser, electron beam). The problem is that, in the case of individual welding tracks in the edge region close to the surface, an incorrectly oriented tissue has formed. For successive overlapping tracks, this means that the solidification front in this region has no SX nuclei and that the region continues to expand in the overlapping region with a wrong orientation (no SX structure). Cracks form in this area. [0003] For γ'-strengthened SX nickel-based superalloys, the welding methods used so far do not allow the weld metal to be constructed homogeneously in one or more layers with the same SX structure in the lap weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/34C30B11/00F01D5/00F01D5/28
CPCB23K35/0244F01D5/286B23K26/345F05D2230/90B23K26/3213F05B2230/312F01D5/005B23K26/3206F05D2300/606B23K35/007F05D2230/234F05D2230/80B23K2201/001F05D2230/30C30B13/24F05C2253/083C30B29/52F05B2230/90F05B2230/30F05C2253/0831F05D2300/607F05D2230/312F05B2230/80F05B2230/234B23K26/34Y02T50/67B23K26/32B23K26/342B23K2101/001B23K2103/08B23K2103/26B23K2103/50C30B11/00F01D5/00F01D5/28Y02T50/60
Inventor 贝恩德·布尔鲍姆安德烈斯·加塞尔托尔斯滕·扬博尔斯特法尼·林嫩布林克诺贝特·皮尔沙尼古拉·阿里亚金乔治·博斯坦约格洛托尔斯滕·梅尔策-约基施塞利姆·莫卡德姆米夏埃尔·奥特罗尔夫·维尔肯赫纳
Owner SIEMENS AG
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