Heat Treatment

The main objective of this project work was to asses grinding wear behavior of austempered ductile iron balls. In this project, ductile iron balls were austenitised at 900°c and subjected to two step austempering heat treatment process. In the two step austempering process, the first step temperatures were 300°C for 60 minutes and then up quenched to higher temperature of 400°C for 60 min. Wear studies were carried out in dry and wet grinding conditions, in varying PH values from 7 to 10 and compared these results with En-31 forged steel balls. Same balls were used to grind the iron ore and charcoal. During this two step austempering the wear rate of ADI balls decreases with increasing PH of the mineral slurry, and in wet grinding wear rate is reached a peak values were found because of the corrosion influence. The results of wear study were correlated with microstructural features such as bainitic morphology and volume fraction of retained austenite and ferrite lath size.

Informacja dotycząca wprowadzenia produktu do obrotu:
Ten produkt został wprowadzony na rynek przed 13 grudnia 2024 r. zgodnie z obowiązującymi wówczas przepisami (Dyrektywą o ogólnym bezpieczeństwie produktów). W związku z tym może on być nadal sprzedawany bez konieczności dostosowania do nowych wymogów wynikających z Rozporządzenia o Ogólnym Bezpieczeństwie Produktów (GPSR). Produkt zachowuje pełną legalność w obrocie, a jego jakość i bezpieczeństwo pozostają zgodne z obowiązującymi wcześniej standardami.

Information regarding product placement on the market:
This product was placed on the market before December 13, 2024, in accordance with the applicable regulations at the time (the General Product Safety Directive). As a result, it can continue to be sold without needing to meet the new requirements introduced by the General Product Safety Regulation (GPSR). The product remains fully compliant with all previously valid legal standards, ensuring its continued quality and safety.