Manufacture and microstructure performance of H13-TiC gradient composite coating made by laser cladding

TANG Xiao-dan; YAO Jian-hua; KONG Fan-zhi; ZHANG Qun-li

doi:10.3969/j.issn.1001-3806.2010.03.012

In order to solve the coating's general peeling and cracking problems caused by thermal stress at high temperature,H13-TiC gradient composite coatings were made by laser cladding on the surface of H13 hot-work die steel substrates.Using scanning electron microscope,X-ray diffraction and energy dispersive spectrometry,the microstrueture and morphology,distribution of constituents,hardness and thermal stability were checked.The results show that the coating mainly consists of Fe-Cr,TiC,TiO4 and Fe7C3.Polyhedron and dendritic TiC particles were dispersed in the coating.With the rising of TiC,TiC particles become larger,the hardness of the gradient coating is gradually improved,the dendritic structure in the bonding zone become smaller,and their distribution is in gradient.After heating at high temperature of 600℃ and cooling in the air,the decrease of the hardness is the largest in remehing region among the layers,while the substrate H13 steel is in the second place.On the whole,the hardness distribution of the coating is still in gradient.H13-TiC gradient composite coatings made by laser cladding have a great potential for applications.

Manufacture and microstructure performance of H13-TiC gradient composite coating made by laser cladding

Corresponding author: YAO Jian-hua, las.Er@zjut.Edu.cn;

1. Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Hangzhou 310014, China;

2. Research Center of Laser Processing Technology and Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Received Date: 2009-05-08

Accepted Date: 2009-06-12

Available Online: 2010-05-25

Abstract: In order to solve the coating's general peeling and cracking problems caused by thermal stress at high temperature,H13-TiC gradient composite coatings were made by laser cladding on the surface of H13 hot-work die steel substrates.Using scanning electron microscope,X-ray diffraction and energy dispersive spectrometry,the microstrueture and morphology,distribution of constituents,hardness and thermal stability were checked.The results show that the coating mainly consists of Fe-Cr,TiC,TiO4 and Fe7C3.Polyhedron and dendritic TiC particles were dispersed in the coating.With the rising of TiC,TiC particles become larger,the hardness of the gradient coating is gradually improved,the dendritic structure in the bonding zone become smaller,and their distribution is in gradient.After heating at high temperature of 600℃ and cooling in the air,the decrease of the hardness is the largest in remehing region among the layers,while the substrate H13 steel is in the second place.On the whole,the hardness distribution of the coating is still in gradient.H13-TiC gradient composite coatings made by laser cladding have a great potential for applications.

HTML

Reference (15)

[1]	PAN X H,ZHU Z Ch.The study of the chemical composition and improvement and development for the H13 hot work die & mold steel[J].Die & Mould Manufacture,2006(4):78-85(in Chinese).
[2]	ZHANG Ch Y,XIONG W H.Research of TiC horniness alloy[J].Cemented Carbide,2000,17(3):134-138(in Chinese).
[3]	SUN J R,SUN Y Sh,FAN Q.Microstructure and mechanical properties of TiCp/H13 (4Cr5MoV1Si) composites[J].Materials Science and Technology,2001,9(2):146-149(in Chinese).
[4]	JIN Y X,LIU S W,ZENG S Y.Wear resistance and wear mechanism of TiCp/Ti6Al4V composite[J].Materials Science and Technology,2008,16(2):184-188(in Chinese).
[5]	QU T Y,ZHAO H Y,OU Y J.Study of high-temperature stability of a TiC/Ni-Al composite coating prepared by laser deposition[J].Rare Metals and Cemented Carbides,2008,36(1):11-15(in Chinese).
[6]	HIRAI T,CHEN L.Recent and prospective development of functionally graded materials in Japan[J].Materials Science Forum,1999,308/311:509-514.
[7]	JASIM K M,RAWLINGS R D,WEST D R F.Metal-ceramic functionally gradient materials produced by laser processing[J].Journal of Mater Science,1993,28(10):2820-2826.
[8]	YANG S,ZHAO J L,YANG X.Research status of functionally coating produced by laser cladding[J].Laser Technology,2007,31(2):220-224(in Chinese).
[9]	JIANG W P,MOLLAN P.Nanocrystalline TiC powder alloying and glazing of H13 steel using a CO2 laser for improved life of die-casting dies[J].Surface and Coatings Technology,2001,135(2/3):139-149.
[10]	JIANG W H,KOVACEVIC R.Laser deposited TiC/H13 tool steel composite coatings and their erosion resistance[J].Journal of Materials Processing Technology,2007,186(1/3):331-338.
[11]	WAKASHIMA K,HIRANO T,NINO M.Space application of advance structure materials[R].Paris:European Space Agency Special Publication,1990:97.
[12]	CHEN L,HUANG F X,LIU X M.Relationship between characteristic and property of cladding and laser processing parameters[J].Electric Welding Machine,2007,37(3):20-22(in Chinese).
[13]	LI M W,ZHU J Ch,YIN D Zh.The equivalent estimates of thermal conductivity of particle dispersion composite material[J].Functional Materials,2001,32(4):793-794(in Chinese).
[14]	QI Y T,SHI H Ch.Influence of Ti(C,N)particle on microstructure and performance of laser cladding Ni-based coating[J].China Surface Engineering,2008,21(2):26-30(in Chinese).
[15]	WANG C Sh,XIA J L,LI G.Microstructure and properties of Ni-WC gradient composite coating produced by broad-beam laser cladding[J].Applied Laser,2001,21(3):151-158(in Chinese).

Manufacture and microstructure performance of H13-TiC gradient composite coating made by laser cladding

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views