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Suitability of Maraging Steel Weld Cladding for Repair of Die-Casting Tooling

Part I: Influence of Welding and Aging Heat Treatment on 18% Ni Maraging Steel Weld Microstructure and Mechanical Properties
  • Damjan Klobčar , Janez Tušek and Ladislav Kosec
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 100 Issue 5

Abstract

A comprehensive study of 18 % Ni maraging steel welds is done in order to determine the suitability of repair welding of aluminum die-casting dies and to prolong the in-service tool life. This study emphasizes the influence of welding parameters and post-welding precipitation annealing heat treatment on the welds' mechanical and metallurgical properties. A series of U-grooved specimens of 1.2344 tool steel is prepared. These grooves are filled with 1.6356 maraging steel as filler wire using multi-pass Gas Tungsten Arc welding. The metallurgical properties of the filler welds, in the as-welded condition and after precipitation annealing with a series of different parameters, are studied. The influence of preheat temperature, heat input during welding, and hot working of maraging steel welds is evaluated regarding mechanical and metallurgical properties. The response surface models for the prediction of mechanical properties (i. e. hardness, toughness, tensile strength, and yield stress after post-welding heat treatment) are developed. The results show that metallurgical and mechanical properties significantly depend on welding technology and post-welding heat treatment parameters. Gas Tungsten Arc welding with low heat input permits the omission of solution heat treatment after welding, while hot working of welds during welding increases the mechanical properties. Developed models for the prediction of mechanical properties enable selection of precipitation annealing parameters for a particular application based on desired mechanical properties.

Keywords: Maraging steel microstructure; GTA welding; Response surface methodology; Precipitation annealing; High pressure die-casting
* Correspondence address, Ph.D. Damjan Klobčar, University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, SI-1000 Ljubljana, Slovenia, Tel.: +386 1 4771 205, Fax: +386 1 4771 225, E-mail:

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Received: 2007-6-29
Accepted: 2008-12-12
Published Online: 2013-06-11
Published in Print: 2009-05-01

© 2009, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110078
Keywords for this article
Maraging steel microstructure; GTA welding; Response surface methodology; Precipitation annealing; High pressure die-casting

Articles in the same Issue

  1. Contents
  2. Contents
  3. Feature
  4. Nd–Fe–B permanent magnets a quarter century later: implications for patentability
  5. Micromagnetism of advanced hard magnetic materials
  6. Magnetism of nanostructured materials for advanced magnetic recording
  7. Basic
  8. A Study of the Al–Mg–B Ternary Phase Diagram
  9. Effects of Lanthanum on Magnetic Behavior and Hardness of Electroless Ni–Fe–P Deposits
  10. Interfacial Reactions between Lead-Free Solders and the Multilayer Au/Ni/SUS304 Substrate
  11. Melting Behavior of Sn–Bi Alloy Powder Compacts Observed Using Optical Dilatometry
  12. High-Strength Mg-Based Bulk Metallic Glass Composites with Remarkable Plasticity
  13. Determination of Liquidus Temperature in Sn–Ti–Zr Alloys by Viscosity, Electrical Conductivity and XRD Measurements
  14. The coupled FEM analysis of super-high angular speed polishing of diamond films
  15. Applied
  16. Comparison of Depth-Sensing Indentation at Ultramicroscopic Contacts by Single- and Multiple-Partial-Unload Cycles
  17. Sintering Behavior of ZnO: Mn Ceramics Fabricated from Sol-Gel Derived Nanocrystalline powders
  18. Suitability of Maraging Steel Weld Cladding for Repair of Die-Casting Tooling
  19. Enhanced properties of functionally graded Cu–Cr powder compacts
  20. Influence of Cr on the microstructure and mechanical properties of Ti–Si Eutectic Alloys
  21. Notifications
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