Effect of Welding Thermal Cycles on Microstructure and Mechanical Properties of Simulated Heat Affected Zone for a Weldox 1300 Ultra-High Strength Alloy Steel

• Autorzy: Węglowski M. St. , Zeman M. , Grocholewski A.
• Języki publikacji: EN

Abstrakty

EN

In the present study, the investigation of weldability of ultra-high strength steel has been presented. The thermal simulated samples were used to investigate the effect of welding cooling time t_8/5 on microstructure and mechanical properties of heat affected zone (HAZ) for a Weldox 1300 ultra-high strength steel. In the frame of these investigation the microstructure was studied by light and transmission electron microscopies. Mechanical properties of parent material were analysed by tensile, impact and hardness tests. In details the influence of cooling time in the range of 2,5 ÷ 300 sec. on hardness, impact toughness and microstructure of simulated HAZ was studied by using welding thermal simulation test. The microstructure of ultra-high strength steel is mainly composed of tempered martensite. The results show that the impact toughness and hardness decrease with increase of t_8/5 under condition of a single thermal cycle in simulated HAZ. The increase of cooling time to 300 s causes that the microstructure consists of ferrite and bainite mixture. Lower hardness, for t_8/5 ≥ 60 s indicated that low risk of cold cracking in HAZ for longer cooling time, exists.

Słowa kluczowe

EN

ultra-high strength steel; weldability; Weldox 1300 steel; physical simulation

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 1
• Strony: 127--132
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr.

Twórcy

autor

Węglowski M. St.

• Institute of Welding, Testing of Materials Weldability and Welded Constructions Department, 16-18 Bł. Czesława Str., 44-100 Gliwice, Poland

autor

Zeman M.

• Institute of Welding, Testing of Materials Weldability and Welded Constructions Department, 16-18 Bł. Czesława Str., 44-100 Gliwice, Poland

autor

Grocholewski A.

• SSAB Poland Sp.zo.o., Kolejowa Str. 15, 55-020 Żórawina, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę