Search Results for gas carburizing

Fig. 12.25 (Part 1) Case carburizing: gas carburizing in an atmosphere of low carbon potential. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). (a) and (b) Gas carburized at 900 °C for 45 min in sealed-quench furnace, oil quenched, tempered at 150 °C. Normalized from 850 °C after carburizing More

Fig. 12.25 (Part 2) Case, carburizing: gas carburizing in an atmosphere of low carbon potential. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). (a) and (b) Gas carburized at 900 °C for 45 min in sealed-quench furnace, oil quenched, tempered at 150 °C. Normalized from 850 °C after carburizing More

Fig. 12.26 (Part 1) Case carburizing: gas carburizing in an atmosphere of high carbon potential. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). (a) to (c) Gas carburized at 900 °C for 45 min in sealed-quench furnace with excessive gas enrichment, oil quenched. Direct from carburizing furnace More

Fig. 12.26 (Part 2) Case carburizing: gas carburizing in an atmosphere of high carbon potential. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). (a) to (c) Gas carburized at 900 °C for 45 min in sealed-quench furnace with excessive gas enrichment, oil quenched. Direct from carburizing furnace More

Fig. 12.27 (Part 1) Case carburizing: gas carburizing in an ammonia-containing atmosphere. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). (a) and (b) Gas carburized at 880 °C for 3.25 h; 5% ammonia added during last hour, sealed quench in oil. Direct from carburizing furnace; tempered at 150 °C More

Fig. 12.27 (Part 2) Case carburizing: gas carburizing in an ammonia-containing atmosphere. 0.15% C (0.17C-0.05Si-0.64Mn, wt%). (a) and (b) Gas carburized at 880 °C for 3.25 h; 5% ammonia added during last hour, sealed quench in oil. Direct from carburizing furnace; tempered at 150 °C More

Fig. 21.3 Effect of time and temperature on case depth during gas carburizing. Source: Ref 1 More

Fig. 21.4 Effect of temperature on time during gas carburizing. Source: Ref 1 More

Fig. 4.12 Vacuum gas carburizing furnace. Source: Ref 1 More

Fig. 22.2 (a) Plasma-carburized 8719 steel. (b) Gas-carburized 8719 steel. Both specimens nickel plated and unetched. Light micrographs. Source: Ref 22.22 More

Fig. 8 Carbon gradients for gas-carburized 1020 and 8620 steels. The 1020 steel was carburized in a batch furnace, and the 8620 was carburized in a pit furnace. More

Fig. 19 Fatigue limits of plasma- and gas-carburized test specimens as a function of retained austenite content More

Fig. 26 Residual-stress profiles of SCM420 steel that was gas carburized at 930 °C, oil quenched, and tempered at 200 °C More

Fig. 22 9310 steel, gas carburized microstructures 4 h at 925–940 °C (1700–1725 °F), furnace cooled, austenitized at 815–830 °C (1500–1525 °F), oil quenched and tempered 4 h at 150 °C (300 °F). Source: Ref 12 More

Fig. 8 Fatigue fracture in gas-carburized and modified 4320 steel. (a) Overview of initiation, stable crack propagation, and unstable crack propagation. (b) Same area as shown in (a), but with extent of stable crack indicated by dashed line. (c) Higher magnification of intergranular initiation More

Fig. 9 Hardness vs. distance from the surface of direct-cooled gas-carburized SAE 4320 steel. Superimposed on the hardness profile is the range of critical depths (vertical dashed band) at which stable fatigue cracks became unstable in bending fatigue of similarly processed steels. Source More

Fig. 14 S - N curves determined by bending fatigue of a gas-carburized SAE 8219-type steel containing 1.40 Mn, 0.61 Cr, 0.30 Ni, 0.20 Mo, and three levels of sulfur. Source: Ref 20 More

Fig. 18 S - N curves for direct-quenched gas-carburized 4615 and 8620 steels, notched 4-point bend specimens. Compositions of the steels are given in Table 1 . Non-martensitic transformation products were present on the surfaces of the 8620 steel specimens and absent on the 4615 steel More

Fig. 20 Bending fatigue crack initiation in gas-carburized and reheated 4320 steel. The dashed line corresponds to maximum depth of surface oxidation, and all fracture below dashed line is transgranular. Source: Ref 28 More

Fig. 21.22 Surface oxidation in a gas carburized 8627 steel containing 0.92% Mn, 0.27% Si, 0.51%Cr, 0.22% Mo, and 0.52% Ni. Aspolished, Ni-plated surface (for edge retention), light micrograph. Source: Ref 21.42 More