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Method for preparing Fe-Mn-Si shape memory alloy coating via laser cladding

A fe-mn-si, laser cladding technology, applied in the field of alloy coating, can solve the problems of not completely preventing cracks, lack of theoretical breakthroughs, etc., and achieve the effect of low residual stress, excellent comprehensive mechanical properties, and smooth surface

Inactive Publication Date: 2013-11-27
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods lack corresponding theoretical breakthroughs, and cannot completely prevent cracks from occurring.

Method used

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  • Method for preparing Fe-Mn-Si shape memory alloy coating via laser cladding
  • Method for preparing Fe-Mn-Si shape memory alloy coating via laser cladding
  • Method for preparing Fe-Mn-Si shape memory alloy coating via laser cladding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The raw material powder is configured according to the following mass percentages: 17% manganese powder, 5% silicon powder, 10% chromium powder, 5% nickel powder, 0.5% vanadium powder, La 2 o 32% powder, 2% quartz, 2.5% wood powder, 3% starch, and the rest is pure iron powder. Pour the proportioned powder into the ball mill, and the ball milling time is 4h. Before cladding, the cladding powder needs to be vacuum-dried at 150℃×2h, and then the powder is pre-washed with a scraper with a groove of 1.5mm×10mm×45mm. Place it on the base material with a preset thickness of 1.5mm, use a laser with a power of 2.5Kw and a laser spot diameter of 3mm to clad the above powder, the scanning speed is 800mm / min, and the overlapping rate of multi-pass cladding is 50%.

Embodiment 2

[0048] Carry out embodiment 1 repeatedly by the same step as described, but configure raw material powder by following mass percentage in embodiment 2: manganese powder 17%, silicon powder 5%, chromium powder 10%, nickel powder 5%, all the other compositions are pure Iron powder.

Embodiment 3

[0050] Carry out embodiment 1 repeatedly by described same step, but configure raw material powder by following mass percent in embodiment 3: manganese powder 17%, silicon powder 5%, chromium powder 10%, nickel powder 5%, quartz 2%, 2.5% wood flour, 3% starch, and the rest are pure iron powder.

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Abstract

The invention discloses a method for preparing a Fe-Mn-Si shape memory alloy coating via laser cladding. The Fe-Mn-Si shape memory alloy coating comprises raw materials including pure iron powder, nickel power, manganese powder, silicon powder, chromium powder, vanadium powder, terrae rare, quartz, wood flour, starch and the like, via the laser cladding way, the Fe-Mn-Si shape memory alloy coating prepared by the method has an excellent mechanical property, and particularly has the characteristics of good abrasion resistance, low stress residue, high fatigue strength. The self-designed cladding power preparation process is simple and suitable for industrial mass production, the cladding process is simple and easy to implement, and the obtained functional coating has greater market application prospects.

Description

technical field [0001] The invention belongs to the technical field of alloy coatings, in particular to a method for preparing Fe-Mn-Si shape memory alloy coatings by laser cladding. Background technique [0002] Laser cladding, also known as laser cladding or laser cladding, is a new surface modification technology. It adds cladding materials on the surface of the base material in different ways, and uses a high-energy-density laser beam to melt the cladding material and the thin layer of the base material surface together to form a metallurgically bonded cladding on the surface of the base layer. layer. Since cladding formed metal parts can obtain extremely high surface hardness and wear resistance which are difficult to obtain by conventional processing methods, it has a wide range of application prospects in industry. [0003] However, there are few industrial studies on laser cladding coatings to improve surface contact fatigue strength. In addition, due to the chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/58C22C30/00
Inventor 林成新徐鹏刘志杰周超玉
Owner DALIAN MARITIME UNIVERSITY
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