Roughness analysis of graphite surfaces of casting elements

• Autorzy: Wieczorowski M. , Gapinski B. , Trytek A. , Konopacka M.
• Języki publikacji: EN

Abstrakty

EN

In the paper profilometric measurements of graphite casting elements were described. Basic topics necessary to assess roughness of their surfaces and influence of asperities on various properties related to manufacturing and use were discussed. Stylus profilometer technique of surface irregularities measurements including its limits resulting from pickup geometry and its contact with measured object were analyzed. Working principle of tactile profilometer and phenomena taking place during movement of a probe on a measured surface were shown. One of the important aspects is a flight phenomenon, which means movement of a pickup without contact with a surface during inspection resulting from too high scanning speed. results of comparison research for graphite elements of new and used mould and pin composing a set were presented. Using some surface roughness, waviness and primary profile parameters (arithmetical mean of roughness profile heights Ra, biggest roughness profile height Rz, maximum primary profile height Pt as well as maximum waviness profile height Wt) a possibility of using surface asperities parameters as a measure of wear of chill graphite elements was proved. The most often applied parameter is Ra, but with a help of parameters from W and P family it was shown, that big changes occur not only for roughness but also for other components of surface irregularities.

Słowa kluczowe

EN

quality management; product development; surface roughness

PL

zarządzanie jakością; rozwój produktu; chropowatość powierzchni

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 1 spec.
• Strony: 269--272
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Wieczorowski M.

• Division of Metrology and Measurement Systems, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland

autor

Gapinski B.

• Division of Metrology and Measurement Systems, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland

autor

Trytek A.

• Department of Casting and Welding, Rzeszow University of Technology, W. Pola 2, 35-959 Rzeszow, Poland

autor

Konopacka M.

• IBP Instalfittings Sp. z o.o., Obodrzycka 61, 61-249 Poznan, Poland

Bibliografia

• [1] T.R. Thomas, Rough surfaces, Imperial College Press, London, 1999.
• [2] C.W. Briggs, Steel castings handbook, Steel Founders Society of America, Rocky River, OH, 1974.
• [3] K. Tsutsumi i in., Surface roughness of solidified mold flux in continous casting process, ISIJ Int., 1999, 39, 1150-1159.
• [4] Y.J. Kang i in., Effects of carbon and chromium additions on the wear resistance and surface roughness of cast high-speed steel rolls, Metal.Mat.Trans. A, 2001, 32, 2515-2526.
• [5] D.J. Whitehouse, Theoretical analysis of stylus integration, Annals of the CIRP, 1974, 23, 181-182.
• [6] P. Pawlus, Mechanical filtration of surface profiles, Measurement, 2004, 35, 325-341.
• [7] V. Radhakrishnan, Effect of stylus radius on the roughness values measured with tracing stylus instrument, Wear, 1970, 16, 325-335.
• [8] J.I. McCool, Assessing the effect of stylus tip radius and flight on surface topography measurements, Transactions of the ASME: Journal of Tribology, 1984, 106, 202-210.
• [9] M. Wieczorowski M., Spiral sampling as a fast way of data acquisition in surface topography, International Journal of Machine Tools & Manufacture, 2001, 41, 2017-2022.
• [10] Wieczorowski M. i in., Przewodnik po pomiarach nierówności powierzchni czyli o chropowatości i nie tylko, Poznań, 2003 (in Polish).