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Alloy powder for gray pig iron laser cladding repair and preparation method thereof

A technology of alloy powder and laser cladding, which is applied in the coating process and coating of metal materials, can solve problems such as difficult machining, large difference in expansion coefficient, and unstable performance, so as to reduce the tendency of structure formation and solve poor weldability , Improve the effect of crack resistance

Active Publication Date: 2015-04-08
ACADEMY OF ARMORED FORCES ENG PLA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These mixed powders have problems such as uneven mixing, poor fluidity, and large differences in expansion coefficients, which lead to uncontrollable defects such as cracking, porosity, white mouth, segregation, unstable performance, and difficult machining in actual cladding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]An alloy powder for laser cladding repair of gray cast iron, including: Ni, Cu, C, Al, Si, Ca, Ba, Co elements in the alloy composition, and an appropriate amount of rare earth element Y in the alloy composition 2 o 3 , La 2 o 3 And Ce, its chemical composition is by weight percentage: Cu: 18%; C: 3.2%; Si: 1.8%; Al: 0.01%; Ba: 0.005%; Ca: 0.004%; Co: 0.92%; 2 o 3 :0.002%; La 2 o 3 : 0.023%; Ce: 0.015%; Ni: balance.

[0028] The preparation method of above-mentioned alloy powder comprises the following processes:

[0029] 1. Ni, Cu, C, Al, Si, Ca, Ba, Co and rare earth element Y 2 o 3 , La 2 o 3 , Ce are prepared according to the above-mentioned weight percentage ratio, and the raw materials for making metal powder are ready.

[0030] 2. Start the intermediate frequency, according to the requirements of the smelting process, put in the metal to start smelting, generally put in the metal that is easy to oxidize in the later stage of melting; the melting tempera...

Embodiment 2

[0039] An alloy powder for laser cladding repair of gray cast iron, including: Ni, Cu, C, Al, Si, Ca, Ba, Co elements in the alloy composition, and an appropriate amount of rare earth element Y in the alloy composition 2 o 3 , La 2 o 3 And Ce, its chemical composition is by weight percentage: Cu: 19%; C: 2.3%; Si: 1.9%; Al: 0.03%; Ba: 0.006%; Ca: 0.005%; Co: 0.5%; 2 o 3 : 0.01%; La 2 o 3 : 0.02%; Ni: balance.

[0040] Its preparation method is identical with embodiment one.

Embodiment 3

[0042] An alloy powder for laser cladding repair of gray cast iron, including: Ni, Cu, B, Si, Fe, C, Ba, Ca, Mn elements in the alloy composition, and an appropriate amount of rare earth element Y in the alloy composition 2 o 3 , La 2 o 3 And Ce, its chemical composition is by weight percentage: Cu:20%; B:1.4%; Si:2.0%; Fe:0.8%; C:0.03%; Ba:0.007%; Ca:0.006%; ;Y 2 o 3 : 0.02%; La 2 o 3 : 0.023%; Ce: 0.02%; Ni: balance.

[0043] Its preparation method is identical with embodiment one.

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PUM

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Abstract

The invention provides alloy powder for gray pig iron laser cladding repair and a preparation method of the alloy powder. The alloy powder comprises the chemical components, by weight, 12% to 24% of Cu, 1.5% to 3.5% of C, 0.2% to 2.4% of Si, 0.01% to 0.05% of Al, 0.005% to 0.01% of Ba, 0.001% to 0.01% of Ca, 0.5% to 1.2% of Co, 0.0% to 0.04 % of Y2O3, 0.0% to 0.03% of La2O3, 0.0% to 0.04% of Ce and the balance Ni. According to the alloy powder, because alloy matrix strengthening elements, graphitizing-promoting elements and grain refinement grain boundary strengthening elements are added, and the percentages of the elements are adjusted, alloy acquires the excellent comprehensive performance, the alloy has both the appropriate hardness and the appropriate strength, the possibility of white cast tissue forming is reduced, shock resistance and fatigue resistance are improved, the crack resistance, the formability, the process stability and the component uniformity of the alloy powder in a laser cladding layer are improved, and an effective method convenient to use is provided for successive repair of gray pig iron parts.

Description

technical field [0001] The invention belongs to the field of science and technology of alloy powder materials, and provides an alloy powder material for repairing gray cast iron by laser cladding method with reduced carbon diffusion, moderate hardness, fatigue resistance, excellent impact resistance, and excellent cladding performance and a preparation method thereof The invention is also applicable to other cast iron parts, and specifically relates to an alloy powder for gray cast iron laser cladding repair and a preparation method thereof. Background technique [0002] Gray cast iron has the advantages of good casting performance, excellent vibration damping, good cutting performance, etc., and is widely used in various departments of equipment manufacturing, metallurgy, agricultural machinery, water supply and drainage, and national defense industry. According to statistics, the economic loss caused by gray cast iron casting defects in my country is as high as tens of bil...

Claims

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Application Information

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IPC IPC(8): C22C19/03C23C24/10
Inventor 董世运王玉江孔晓丽闫世兴徐滨士但伟
Owner ACADEMY OF ARMORED FORCES ENG PLA
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