Fracture mechanisms in steel castings

• Autorzy: Stradomski Z. , Stachura S. , Stradomski G.
• Języki publikacji: EN

Abstrakty

EN

The investigations were inspired with the problem of cracking of steel castings during the production process. A single mechanism of decohesion – the intergranular one – occurs in the case of hot cracking, while a variety of structural factors is decisive for hot cracking initiation, depending on chemical composition of the cast steel. The low-carbon and low-alloyed steel castings crack due to the presence of the type II sulphides, the cause of cracking of the high-carbon tool cast steels is the net of secondary cementite and/or ledeburite precipitated along the boundaries of solidified grains. Also the brittle phosphor and carbide eutectics precipitated in the final stage solidification are responsible for cracking of castings made of Hadfield steel. The examination of mechanical properties at 1050°C revealed low or very low strength of high-carbon cast steels.

Słowa kluczowe

EN

cast steel; hot cracking; solidification; segregation

PL

staliwo stopowe; pękanie gorące; krzepnięcie; segregacja

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 3
• Strony: 88--91
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Stradomski Z.

• Department of Materials Science, Technical University of Częstochowa, Poland

autor

Stachura S.

• Department of Materials Science, Technical University of Częstochowa, Poland

autor

Stradomski G.

• Institute of Plastic Deformation and Safety Engineering, Technical University of Częstochowa, Poland

Bibliografia

• [1] Stradomski, Z. (2010). Microstructure in problems of wear of the abrasion resistant cast steel. Częstochowa: Technical University of Częstochowa Publ.
• [2] Chojecki, A., Telejko, I. (2003). Steel casting. Kraków: AKAPIT Publ.
• [3] Stradomski, Z., Pirek, A. & Dyja, D. (2008). Influence of carbides morphology on fracture toughness of cast steel G200CrMoNi4-3-3. Strength of Materials. 40(1), 126-129.
• [4] Stradomski, Z., Pirek, A. & Stachura, S. (2008). Studying possibilities to improve the functional properties of metallurgical rolls. Archives of Foundry Engineering. 8(spec. 1), 313-316.
• [5] Rożniata, E. (2008). The role of cementite in a cracking process of cast steel L2000HNM. PhD dissertation, AGH, Kraków (in Polish).
• [6] Elwazri, A.M., Wanjara, P. & Yue, S. (2005). The effect of microstructural charakteristics of perlite on the mechanical properties of hypereutectoidal steel. Material Science and Engeniering. A(404), 91-98.
• [7] Maratray, F. (1995). High carbon manganese austenitic steels. The International Manganese Institute, Paris.
• [8] Lv, B., Hang, F.C., Li, M., Hou, R.J., Qian, L.H, Wang, T.S. (2010) Effects of phosphorus and sulfur on the thermoplasticity of high manganese austenitic steel. Material Science and Engineering. A(527), 5648-5653.