The influence of microstructure of 30MnB4 steel on hydrogen-assisted cracking

• Autorzy: Krawczyk J. , Bała P. , Frocisz Ł. , Tokarski T. , Pawłowski B.

Identyfikatory

DOI

10.7494/mafe.2015.41.4.171

Warianty tytułu

PL

Wpływ mikrostruktury stali 30MnB4 na pękanie wodorowe

• Języki publikacji: EN

Abstrakty

EN

This paper analyzes the problem of susceptibility to hydrogen-assisted cracking (fracture behavior) of zinc-coated screws made of 30MnB4 steel. Two samples (screws) were compared after proper and improper heat treatment affecting hydrogen solubility during the further galvanic process and resulting in different fracture modes. Both samples were loaded to failure by torsion. The fracture surface and microstructure of the samples were examined using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).

PL

Praca dotyczy problemu pękania wspomaganego wodorem. Materiałem do badań były śruby ocynkowane wykonane ze stali 30MnB4. Porównywano dwie próbki po poprawnej obróbce cieplnej, obejmującej hartowanie i niskie odpuszczanie, oraz obróbce polegającej wyłącznie na hartowaniu. Sposób przeprowadzenia obróbki cieplnej skutkował zmianami w rozpuszczalności wodoru w strukturze analizowanej stali. Wodór dostarczony został do materiału podczas procesu elektrolitycznego pokrywania cynkiem. Po procesie cynkowania obie próbki były skręcane do zerwania. Powstałe przełomy i zgłady metalograficzne badanych materiałów obserwowano przy wykorzystaniu skaningowego mikroskopu elektronowego (SEM), dokonano również analizy ich składu chemicznego, wykorzystując metodę spektroskopii rentgenowskiej z dyspersją energii fali (EDS).

Słowa kluczowe

EN

hydrogen assisted cracking; hydrogen trapping; zinc coating; toughened steel

PL

pękanie wspomagane wodorem; pułapkowanie wodoru; cynkowanie; stal ulepszana cieplnie

• Wydawca: AGH University of Science and Technology Press
• Czasopismo: Metallurgy and Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 41, no. 4
• Strony: 171--180
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Krawczyk J.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland

autor

Bała P.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland, Academic Centre for Materials and Nanotechnology, Krakow, Poland

autor

Frocisz Ł.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland

autor

Tokarski T.

• AGH University of Science and Technology, Faculty of Non-Ferrous Metals, Krakow, Poland

autor

Pawłowski B.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland

Bibliografia

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