A nickel-based alloy powder for laser repair of the air intake shell of an internal combustion engine supercharger

A nickel-based alloy, laser repair technology, applied in the field of nickel-based alloy powder, can solve the problems of amorphous products, poor weldability, whitening and other problems, achieve good toughness, small crack tendency, and improve the effect of crack resistance

Active Publication Date: 2016-07-06
上海大陆天瑞激光表面工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the air intake shell is made of cast iron, its weldability is poor. The conventional repair method is welding. The material used is generally cast iron welding rod, but these materials have problems in the process of repair and use. Such as cracking, whitening, porosity, desoldering, etc.
No material directly used for laser cladding has been found in the prior art. Laser cladding repair has increasingly become the main technical means of welding repair due to its unique technical advantages. Amorphous product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] In the air intake shell of an internal combustion engine of a locomotive and rolling stock factory in Dalian, cracks appeared in 3 of the 8 connecting bolt holes during use, and the crack length ranged from 8 to 20 mm. Firstly, carry out flaw detection inspection, and manually clean the cracks until all the cracks are cleaned up. After the flaw detection is free of defects, clean the cleaned part to remove all dirt and oxides in the area. Grind to a suitable groove and use this material for laser cladding. The laser cladding parameters are "power: 600W, spot diameter: 2mm, scanning speed: 5mm / s, powder thickness: 1mm." The powder with a particle size of 200 mesh is used for cladding, and the material composition is: Cr: 4%; Ti Cu: 3%; Nb: 0.2%; Y: 0.2%; B; 0.3%; Ni: balance. After cladding, mechanical processing restores the size and precision of the original screw hole, meeting the design requirements. After the coloring flaw detection test shows no defects, it is as...

example 2

[0027] The air intake shell of a certain type of internal combustion engine cracked during use. Carry out flaw detection inspection and clean up the cracks. After the flaw detection is free of defects, the cracks will be ground to a suitable groove, and the material will be used for laser cladding. The laser cladding parameters are "power: 1600W, spot diameter: 3mm, scanning speed: 5mm / s, powder thickness: 1mm." The powder with a particle size of 200 mesh is used for cladding, and the material composition is: Cr: 3%; Ti Cu: 2%; Nb: 0.1%; Y: 0.1%; B; 0.1%; Ni: balance.

[0028] After cladding, machining restores the size and precision to meet the design requirements. After no defects were detected by coloring flaw detection, it was assembled on the test bench for test run. After the test run, it was disassembled and inspected. There were no defects and reached the design index.

example 3

[0030] The air intake shell of a certain type of internal combustion engine cracked during use. Carry out flaw detection inspection and clean up the cracks. After the flaw detection is free of defects, the cracks will be ground to a suitable groove, and the material will be used for laser cladding. The laser cladding parameters are "power: 2300W, spot diameter: 1mm, scanning speed: 15mm / s, powder thickness: 2mm." The powder with a particle size of 200 mesh is used for cladding, and the material composition is: Cr: 5%; Ti Cu: 4%; Nb: 0.5%; Y: 0.3%; B; 0.3%; Ni: balance.

[0031] After cladding, machining restores the size and precision to meet the design requirements. After no defects were detected by coloring flaw detection, it was assembled on the test bench for test run. After the test run, it was disassembled and inspected. There were no defects and reached the design index.

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Abstract

A sort of Nickel-base Alloy Powders for Restoration of Intake Housings of Superchargers of Internal Combustion Engines , whose composition includes Ni, Cr 、 Ti ， It is also characterized by Nb 、 Y 、 Cu 、 B , where the mass percent of each component is: Cr ： 3~5% ； Ti ： 1~3% ； Cu ： 2~4% ； Nb ： 0.1~0.5 % ； Y ： 0.1~0.3% ； B ； 0.1~0.3% ； Ni :margin. this invention It has moderate hardness and strength, but also has good toughness, does not form white structure when it interacts with cast iron, and has the characteristics of extremely small crack tendency.

Description

technical field [0001] The invention relates to an alloy powder material suitable for laser cladding, in particular to a nickel-based alloy powder with crack resistance and stable performance for the repair of the intake shell of an internal combustion engine supercharger, which belongs to the international patent classification table C23C24 / 10 (2006.01) I technical field. Background technique [0002] Supercharger is an important equipment for diesel locomotives to increase power and reduce energy consumption, and the intake shell is an important part of the supercharger. Since some parts of the supercharger work at a high temperature of 650-700 ° C, and some parts work at room temperature, the temperature gradient is very large, causing a very large thermal stress. Under normal circumstances, cracks will appear at the position of the connecting bolt hole, which is the main form of damage and failure of the air intake shell. Once cracks appear, the strength of the air int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C19/03
Inventor 张静波陈江朴新欣
Owner 上海大陆天瑞激光表面工程有限公司
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