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Metals 2017, 7(9), 339; doi:10.3390/met7090339

Steel Weld Metal Deposit Measured Properties after Immediate Micro-Jet Cooling

1
Department of Technical Sciences, University of Occupational Safety Management, 40-007 Katowice, Poland
2
Department of Engineering Production, Silesian University of Technology, 40-019 Katowice, Poland
3
Transport Department, Silesian University of Technology, 40-019 Katowice, Poland
4
Transport Department, Vocational Training Center, 41-400 Mysłowice, Poland
*
Author to whom correspondence should be addressed.
Received: 31 May 2017 / Revised: 24 July 2017 / Accepted: 31 July 2017 / Published: 1 September 2017
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Abstract

The aim of this paper is to present a welding process connected with micro-jet cooling. This method allowed us to guide the metallographic structure, and furthermore, the properties of the weld metal deposit. The main conclusion of this paper was that after welding with micro-jet cooling, it was possible to achieve beneficial metallographic structures that are impossible to obtain in any other way. These structures corresponded to very good mechanical properties of the welds. The research results described the influence of an artificially enhanced amount of acicular ferrite in the weld metal deposit (WMD) even above 65% when using micro-jet cooling. The results of this process were very positive due to the very high impact toughness of welds at negative temperature. The main parameters of micro-jet cooling are: cooling stream diameter (about 60 µm), gas pressure (about 0.6 MPa), the use of various gases and gas mixtures (main micro-jet gases: argon, helium, nitrogen, carbon dioxide, oxygen, air). View Full-Text
Keywords: steel welding; micro-jet cooling; impact toughness; microstructure; WMD—Weld Metal Deposit steel welding; micro-jet cooling; impact toughness; microstructure; WMD—Weld Metal Deposit
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Szczucka-Lasota, B.; Gajdzik, B.; Węgrzyn, T.; Wszołek, Ł. Steel Weld Metal Deposit Measured Properties after Immediate Micro-Jet Cooling. Metals 2017, 7, 339.

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