Fracture Mechanisms in Steel Castings

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Abstract

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.

[1] Stradomski, Z. (2010). Microstructure in problems of wearof 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 crackingprocess 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 andEngeniering. A(404), 91-98.

[7] Maratray, F. (1995). High carbon manganese austeniticsteels. 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. MaterialScience and Engineering. A(527), 5648-5653.

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

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CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316

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