The structure of the alphinizing coat on alloy steels

• Autorzy: Pietrowski S. , Szymczak T.
• Języki publikacji: EN

Abstrakty

EN

In this paper results of the structure of the coat alphinizing in AlSi5 silumin on alloy steels: acid-proof 1H18N9T (X6CrNiTi18-10) and high speed SW18 (HS18-0-1) were presented. The temperature of the alphinizing bath was amounts to750š5°C, and immersion time of the element [tau] = 180s. It was shown, that there is the different "g" coat thickness on testing steels. On the 1H18N9T steel it amounts to g = 52[mikro]m, and on the SW18 steel - g = 203[mikro]m. Regardless of a grade of testing alloy steels the coat consist of three layers with diversified phasic structure. There is different chemical composition of coat layers on testing steels. The first layer from the base consist of AlFe phase containing alloy addictions of steels: Cr and Ni (1H18N9T) and W, V and Cr (SW18). On this layer crystallize the second layer of intermetallic phases. It is the phase containing the main alloy addiction of steels: AlFeCr (1H18N9T) and AlFeW (SW18). The last, outside layer consist of silumin containing AlFeNi intermetallic phases on the 1H18N9T steel and AlFeW on the SW18 steel. Regardless of the grade of testing steels there is Si element in all layers of the coat. There are morphological differences in tested layers. The second layer (AlFeW phase) inside the coat on the SW18 steel consist of faced crystals growing into in outside silumin layer. On the 1H18N9T steel a boundary between transient and outside layer is more uniform. Free separations of intermetallic phases inside silumin layer on the 1H18N9T steel have lamellar and on the SW18 steel - faced form.

Słowa kluczowe

EN

innovative foundry technologies; innovative foundry materials; alloy steels; silumins; alphinize; layered casts; X-ray microanalysis

PL

innowacyjne technologie odlewnicze; materiały innowacyjne w odlewnictwie; stale; siluminy; odlewy warstwowe; mikroanaliza rentgenowska

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 4
• Strony: 229--235
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Pietrowski S.

autor

Szymczak T.

• Technical University of Łódź, Department of Materials Engineering and Production Systems,

Bibliografia

• [1] S. Pietrowski, Structure of alfinizing layer on the gray cast iron, Archives of Foundry, No. 11, 2004 (in Polish).
• [2] S. Pietrowski, T. Szymczak, The structure of Al-Si immersing coatings on iron alloys, Archives of Foundry, No. 12, 2004 (in Polish).
• [3] S. Pietrowski, T. Szymczak, The structure of connection of alphinizing coat with silumin, Archives of Foundry, No. 14, 2004 (in Polish).
• [4] S. Pietrowski, T. Szymczak, The influence of surface roughness on the coating thickness after alphinizing, Archives of Foundry, No. 17, 2005 (in Polish).
• [5] S. Pietrowski, T. Szymczak, The influence of selected technological elements on the structure of alphinizing coat on iron alloys, Archives of Foundry, No. 19, 2006 (in Polish).
• [6] S. Pietrowski, L. Klimek, T. Szymczak, Diffraction research of the alphinizing coat on iron alloys, Archives of Foundry, No. 22, 2006 (in Polish).
• [7] S. Pietrowski, T. Szymczak, Crystallization model of layered cast through the alphinizing coat, Materials Engineering, No. 5, 2006, 1178-1183.
• [8] S. Pietrowski, T. Szymczak, Effect of silicon concentration in bath on the structure and thickness of grey cast iron coating after alphinising, Archives of Materials Science and Engineering, vol. 28, issue 7, 2007, 29-33.
• [9] T. Szymczak, Model of coat increase on iron alloys hot dip obtained in Al-Si bath and its connection with multicomponent silumins, PhD thesis, Technical University of Łódź, 2007.