Study on laser clad cobalt-free nickel-based alloys coatings on stainless steel

ZHANG Yong-zhong; TU Yi; JIN Ju-tao; SHI Li-kai

doi:10.3969/j.issn.1001-3806.2010.01.007

LASER TECHNOLOGY > 2010 > 34(1): 22-25. > DOI: 10.3969/j.issn.1001-3806.2010.01.007

ZHANG Yong-zhong, TU Yi, JIN Ju-tao, SHI Li-kai. Study on laser clad cobalt-free nickel-based alloys coatings on stainless steel[J]. LASER TECHNOLOGY, 2010, 34(1): 22-25. DOI: 10.3969/j.issn.1001-3806.2010.01.007

Citation:

PDF (349 KB)

Study on laser clad cobalt-free nickel-based alloys coatings on stainless steel

National Engineering Research Center for Nonferrous Metals Composites, General Research Institute for Non-ferrous Metals, Beijing 100088, China

More Information

Received Date: February 09, 2009
Revised Date: February 15, 2009
Published Date: January 24, 2010

Graphical Abstract

Abstract

Abstract

To meet the cobalt-free requirement for a certain valve, thicker coating with gradient hardness distribution was prepared on 0Cr18Ni10Ti stainless steel by laser cladding two kinds of cobalt-free nickel-based alloy powder. The microstructure, hardness and the interface bonding strength of the coating were analyzed. The results showed that using nickel-based alloy with lower hardness as a transition layer, the problem of cracking for nickel-based alloy coating with higher hardness could be resolved. The interfaces between the coating and the substrate as well as these two nickel-based alloy coatings were smoothly transited. The hardness was also gradient along the cross-section of the coating. The hardness of the coating surface was about HRC47. The coating was metallurgically bonded with the substrate. And the interface bonding strength of the coating was higher than 565MPa. There was no de-bonding and cracking after bending and thermal shock test, indicating the good anti-thermal shock property of the coating.
- laser technique,
- laser cladding,
- cobalt-free nickel-based alloy coating,
- microstructure,
- hardness,
- interface bonding strength

FullText(HTML)

References (11)

References

[1]	LIN L Z,LIU Y C,LIU X L,et al.Surfacing technology of Ni-alloy on valve's sealing face[J].Welding,2006(4):29-32(in Chinese).
[1]	GURUMOORTHY K,KAMARAJ M,RAO K P,et al.Microstructural aspects of plasma transferred arc surfaced Ni-based hardfacing alloy[J].Materials Science and Engineering,2007,A456(1/2):11-19.
[2]	LIU R,TAO X Q,PAN L,et al.Structures and properties of laser cladding layer and plasma spraying layers on WF281 alloy[J].Materials Protection,2004,37(5):48-49(in Chinese).
[3]	ZHANG C L.Study on microstructure of laser cladding Co-base alloy on nuclear valve parts[J].Laser Technology,2001,25(2):129-133(in Chinese).
[4]	WANG X L,LI B W,ZHENG Q G.Study on the corrosion resistance of laser cladding layer on the sealing surface of nuclear valve[J].China Surface Engineering,2003,16(6):10-12(in Chinese).
[5]	DAI H,PAN C X.Influence of laser cladding on microstructures of cobalt-based alloy hermetic surface of valves[J].Materials for Mechanical Engineering,2002,26(6):25-27(in Chinese).
[6]	CHANG S S,WU H C,CHEN C.Impact wear resistance of Stellite 6 hardfaced valve seats with laser cladding[J].Materials and Manufacturing Processes,2008,23(7):708-713.
[7]	PERSSON D H E,JACONBSON S,HOGMARK S.Effect of temperature on friction and galling of laser processed Norem 02 and Stellite 21[J].Wear,2003,255(1):498-503.
[8]	PERSSON D H E,JACOBSON S,HOGMARK S.Antigalling and low friction properties of a laser processed Co-based material[J].Journal of Laser Applications,2003,15(2):115-119.
[9]	SU Z D.Deposit welding on sealing surface for nuclear class valves[J].Valve,2007(5):18-25(in Chinese).
[10]	OCKEN H,FINDLAN S J,PHILLIPS M K.Cobalt-free hardfacing alloys with improved welding characteristics:U S,5702668[P].1997-12-30.

Cited By

Get Citation

PDF

XML

Article views (0) PDF downloads (8)

Turn off MathJax

Article Contents

Abstract

References

Study on laser clad cobalt-free nickel-based alloys coatings on stainless steel

Abstract

References

Catalog

Links：

Study on laser clad cobalt-free nickel-based alloys coatings on stainless steel

Abstract

References

Catalog

Links：

Export File

Citation

Format

Content