Five types of ductile cast irons (DCIs) were fabricated by crystallizers with different inner diameters, as well five austempered (ADIs) after the same isothermal quenching process. The effects amount, diameter, and morphology graphite on mechanical properties DCI ADI effect original as-cast microstructure austempering studied. microstructures characterized optical microscopy, scanning electron...

Arbomex S.A. de C. V. is one of the largest worldwide manufacturers ductile cast iron camshafts, produced by means phenolic urethane no-bake sand mold casting method and cold box stack molding technology. As a result development high-strength ADIs, low alloyed with vanadium, for camshaft manufacturing, previous results were published on as-cast process austempering heat treatments applied to ca...

Abstract Isothermal bainitic transformation of a lean medium-Mn steel containing (in mass%) 0.18C–3.6Mn–1.7Al–0.23Si–0.2Mo–0.04–Nb after full austenitization at 1100 ºC was studied by means high resolution dilatometry. The effects isothermal holding temperatures ranging from 450 to 350 °C on the kinetics experimentally characterizing microstructure present time 15 min 2 h. obtained results show...

Ductile irons were produced into different casting wall sections, that is, 25 mm, 5 mm and 3 mm. The alloys then austenitized with the same conditions at 875 °C for 2 h austempered three combinations of temperatures times: 250 6 h, 310 380 1 h. aim investigation was to study ausferrite stability ductile nominal contents nickel in thin sections through tensile testing. So, strain hardening analy...

In the present work, existing Indian elastic rail clip steel (tempered martensite) is microstructurally modified to bainite using austempering route. Crevice corrosion of (ERC) major concern as metal dissolution can cause loosening assembly (such clipinsert and clipliner) lack performance. Furthermore, surface exposed atmosphere could also be affected by corrosive environment. The work concentr...