Thermal fatigue behavior of direct metal deposited H13 tool steel coating on copper alloy substrate

Abstract Thermal fatigue performance of direct metal deposited H13 tool steel coating on copper alloy substrate was investigated for high pressure die casting applications. An innovative thermal fatigue test rig was used which is capable of applying cyclic identical energy on the test materials regardless of thermal conductivity property. H13 tool steel was coated on cylindrical copper alloy core material both directly as well as using 316 stainless steel as a buffer layer to evaluate and compare their thermal fatigue properties. Two types of cracks at the surface of both coatings were observed and investigated. The network of small and shallow cracks on the surface was the result of thermal stress while the large catastrophic cracks were believed to be the consequence of thermal stress coupled with the thermal expansion mismatch between the H13 tool steel coating and copper alloy core materials. The H13 tool steel, coated with 316 stainless steel showed much less number of cracks compared to the directly coated H13 tool steel indicating superior thermal fatigue resistance. Moreover the first layer of the directly coated H13 tool steel showed vulnerable behavior under high temperature application showing numerous cracks. Both coatings showed no crack propagation along the interface between coatings and the substrate materials.

[1]  Y. Birol.  Thermal fatigue testing of Stellite 6-coated hot work tool steel , 2010 .

[2]  Yucong Wang.  A study of PVD coatings and die materials for extended die-casting die life , 1997 .

[3]  Christopher J. Sutcliffe,et al.  The direct metal laser remelting of copper and tool steel powders , 2004 .

[4]  G. Papadimitriou,et al.  Failure analysis of stellite dies for brass extrusion: The effect of aging , 2007 .

[5]  Janez Tušek,et al.  Thermal fatigue of materials for die-casting tooling , 2008 .

[6]  Sri Hinduja,et al.  Boundary element stress analysis for copper-based dies in pressure die casting , 2006 .

[7]  K. Davey,et al.  Boundary element stress analysis for bi-metallic dies in pressure diecasting , 2006 .

[8]  Sri Hinduja,et al.  Bi-metallic dies for rapid die casting , 2006 .

[9]  M. Jahedi,et al.  Performance evaluation of PVD coatings for high pressure die casting , 2001 .

[10]  C. Xie,et al.  INVESTIGATION OF CORROSION BEHAVIOR OF HIGH NICKEL DUCTILE IRON BY LASER SURFACE ALLOYING WITH COPPER , 2001 .

[11]  Yu Wang,et al.  Thermal fatigue behavior of an iron-based laser sintered material , 2009 .

[12]  C. Mitterer,et al.  Application of hard coatings in aluminium die casting — soldering, erosion and thermal fatigue behaviour , 2000 .

[13]  Y. Birol.  Thermal fatigue testing of Inconel 617 and Stellite 6 alloys as potential tooling materials for thixoforming of steels , 2010 .

[14]  J. Mazumder,et al.  Direct materials deposition: designed macro and microstructure , 1998 .

[15]  L. Costa,et al.  Laser powder deposition , 2009 .

[16]  Sri Hinduja,et al.  Thermal Models for Copper-Alloyed Dies in Pressure Die Casting , 2005 .

[17]  Rajiv Shivpuri,et al.  Computer modeling and prediction of thermal fatigue cracking in die-casting tooling , 2004 .

[18]  J. Mazumder,et al.  The direct metal deposition of H13 tool steel for 3-D components , 1997 .

[19]  Y. Birol.  Thermal Fatigue Testing of Tool Materials for Thixoforging of Steels , 2009 .

[20]  Sture Hogmark,et al.  Simulation and evaluation of thermal fatigue cracking of hot work tool steels , 2004 .

[21]  John F. Wallace,et al.  Evaluation of soldering, washout and thermal fatigue resistance of advanced metal materials for aluminum die-casting dies , 2004 .

[22]  J. Choi,et al.  Characteristics of laser aided direct metal/material deposition process for tool steel , 2005 .