Vloga in nastanek mikrostrukturnih sestavin M-A v zvarnih spojih maloogljičnih visokotrdnostnih konstrukcijskih jekelPraunseis, Zdravko (Avtor) Toyoda, Masao (Avtor) Križman, Alojz (Avtor) Ohata, Mitsuru (Avtor) , Inštitut za kovinske materiale in tehnologije (Lastnik avtorskih pravic) arc weldinghigh-strength low-alloy steelsmicrostructuremartensite-austenite constituentsweld metalheat-affected zonecooling rateThe existence of martensite-austenite constituents in the weld metal and heat-affected zone seriously reduces the fracture toughness of the welded joint. Therefore, we have investigated the formation of the martensite-austenite constituents when high-strength low-alloy steel is welded with a high heat input or using multi-pass welding. This paper deals with the effects of martensite-austenite constituents on the fracture toughness, the metallurgical features of the martensite-austenite constituents, and the prevention and elimination of the martensite-austenite constituents in the welded joints.20012012-06-01 13:23:08Znanstveno delo27975sl