Search Results for cast steel

Fig. 3.21 Microstructure of an AISI/SAE 4340 cast steel gear in the (a) as-cast condition consisting of dendrites of bainite (gray etching constituent) and interdendritic regions of ferrite (light etching constituent) and pearlite (dark etching constituent), (b) carburized condition More

Fig. 3-24 Comparison of Young’s modulus for wrought alloys, cast irons and cast steel ( 1 ) More

Fig. 8.38 Cast steel with 0.25% C. The sample was etched in two steps using two different etchants. The top part of the sample was etched with 1% nital and shows the ferrite-pearlite microstructure, characteristic of this steel at room temperature in the “as cast” condition, without further More

Fig. 8.68 Micrograph of as-cast steel containing a network of iron sulfide. The low melting point of the sulfide makes it the last to solidify, forming the network (or continuous “films”) on the grain boundaries. The material is then brittle at high temperature (“hot shortness”) (see Fig More

Fig. 8.69 Micrographs of as-cast steel containing iron sulfide network (a) and globular manganese sulfide (b). No etching. The amount and size of the nonmetallic inclusions shown in this and Fig. 8.68 are almost impossible to find in modern steels produced with current refining processes More

Fig. 8.71 A large oxide nonmetallic inclusion in a cast steel, quenched and tempered. Clearly the reaction between the inclusion and the steel has been stopped by the end of the part solidification. There is a “crown” of small oxide particles around the inclusion. This probably results from More

Fig. 8.73 (a) Oxide inclusion in as-cast steel. The sperical shape of the inclusion may indicate that it precipitated in the liquid state of the steel. SEM, SE. (b) EDS spectrum from the nonmetallic inclusion. The calculated quantitative analysis from the EDS data is listed on the right More

Fig. 8.74 (a) Oxide inclusion in as-cast steel. The inclusion is composed of two phases with different chemical compositions. SEM, BE. (b) The dark, polygonal phase is an oxide containing magnesium and aluminum, probably high melting point spinel (MgAl 2 O 4 ). Its shape indicates it has More

Fig. 8.76 (a) Sulfide nonmetallic inclusion in as-cast steel. SEM, BE. No etching (b) EDS spectrum of the inclusion. Quantitative analysis calculated from EDS results. Manganese sulfide. More

Fig. 8.77 Micrograph of as-cast steel with a high concentration of polygonal manganese sulfide inclusions (sometimes called type III sulfide). Etchant: nitric acid. More

Fig. 8.78 Micrograph of as-cast steel. High concentration of dendritic manganese sulfide (sometimes called type II sulfide). No etching. More

Fig. 8.81 “Rock candy” fracture surface in cast steel, embrittled by the precipitation of aluminum nitride on the grain boundaries during solidification. Source: Ref 31 , 39 More

Fig. 8.82 “Rock candy” fracture surface in cast steel, embrittled by the precipitation of aluminum nitride on the grain boundaries during solidification. SEM, SE. Source: Ref 31 , 39 More

Fig. 9.58 Cast steel containing C = 0.43%, Cu = 0.13%, and P = 0.085%. Normalized after 2 h austenitization at 950 °C (1740 °F). Heterogeneous microstructure containing ferrite and pearlite, indicating heterogeneous austenite. The difference in response to etching (lighter regions) is caused More

Fig. 1 Cast steel gear blank. Weight: 478 kg (1053 lb). Source: Ref 3 More

Fig. 2 Large machined cast steel gear. Source: Ref 3 More

Fig. 6-9 Etched structure of a cast steel, showing dendrites. (B.L. Bramfitt, p 623, in Metals Handbook , 9th edition, Vol 9, Metallography and Microstructure , American Society for Metals, Metals Park, Ohio (1985), Ref 3 ) More

Fig. 6-12 Typical dendritic structure in a cast steel. (from same source as Fig. 6-11 ) More

Fig. 3 Low-carbon cast steel test specimen emphasizing 45° shear aspect of tensile fracture of a ductile metal. Diagonal ridges are “Lüders lines” or “stretcher strains”; porosity in the steel shows many localized fractures. More

Fig. 38 A cast steel feedwater-pump impeller severely damaged by cavitation. Note how damage is confined to the outer edges of the impeller where vane speed was maximum. Source: Nalco Chemical Company More