A process of casting an article includes an iron alloy being heated to a pour temperature of between 1460 C. and 1650 C. and a fluidity length of greater than 23 millimeters to form a melt. The melt is poured into a mold and allowed to solidify to the article. The article is then removed from the mold. A process of forging an article is also provided that includes an iron alloy workpiece being heated to a temperature of between 600 C. and 1200 C. The heated workpiece is then placed into a die set and repeatedly struck with a forging die. The workpiece flows into the die cavity in response to the striking. The workpiece is then removed from the die cavity. The resulting articles and the alloy from which such articles are formed are also provided.

Provided is a method for manufacturing a bearing ring member, whereby processing cost can be reduced and a high degree of freedom in design is obtained, by disposing a metal material of a raw material (13a), the metal material having excellent metal characteristics such as fatigue strength and wear resistance and excellent processing characteristics such as hardenability, in a portion that flows to a portion (raceway surface, etc.) where the characteristics of the metal material are required during use or forging of a bearing ring member. The present invention is configured from a first metal part (23) in which the raw material (13a) is formed in a cylindrical shape, and a second metal part (24) formed in a columnar shape by a metal material having more excellent metal characteristics or processing characteristics than the first metal part (23). For example, the second metal part (24) is disposed in a portion on an inside diameter side of the first metal part (23), which is a portion of the raw material (13a) that flows to an outer raceway (5a, 5b) of an outer ring (2) during forging.

Disclosed is a cold forged gear steel. In addition to Fe and inevitable impurities, the cold forged gear steel further comprises the following chemical elements in mass percentage: 0.15-0.17% of C, 0.10-0.20% of Si, 1.0-1.10% of Mn, 0.80-0.90% of Cr and 0.02-0.04% of Al. Correspondingly, further disclosed is a manufacturing method for the cold forged gear steel, comprising the steps of: (1) smelting and casting; (2) heating; (3) forging or rolling; and (4) spheroidizing annealing: heating to and keeping at 750-770? C., then cooling with a cooling rate of 5-15? C./h to and keeping at 700-720? C., cooling with a cooling rate of 3-12? C./h to and keeping at 660-680? C., and cooling with a cooling rate of 5-20? C./h to 500? C. or below, and then tapping and cooling.

The invention relates to a method for manufacturing a laminated or forged material, the thickness of which is 14 to 100 mm. The materials according to the invention are particularly suitable for manufacturing airplane underwing elements.

Provided are discs and bores of a gas turbine engine having one or more graphene layers and methods of preparing the same. The one or more graphene layers are disposed adjacent to the disc rim and/or bore to improve heat transfer and reduce oxidation of the discs. Methods of preparing the graphene layers and systems for using the same are provided.

The invention relates to a forming method of an annular forging of 718 Plus alloy, which comprises the following steps: wrapping the cylindrical surface of a blank of the 718 Plus alloy with a first blanket, further heating to 1000-1100 C., then stopping heating, and immediately performing upsetting and punching treatment on the blank; further respectively wrapping the outer surface and the punched inner surface of the blank after treatment with second blankets, further heating to 1000-1060 C., then stopping heating, immediately performing blank holder reaming treatment on the blank; and respectively wrapping the outer surface and the reamed inner surface of the blank after treatment with the second blankets, further heating to 985-1038 C., then stopping heating, and immediately rolling the blank to obtain a final product, after the method is used for treatment, the grain size of the forging achieves level 6 or above, and the surface has no common cracks.

The post forging solution anneal step normally carried out on hot forgings made from highly alloyed metals can be eliminated while still avoiding the formation of deleterious intermetallic phases by adopting a number separate features in connection the way the forging is made.

A titanium aluminide alloy material for hot forging has a chemical composition including, by atom, aluminum of 38.0% or greater and 39.9% or less, niobium of 3.0% or greater and 5.0% or less, vanadium of 3.0% or greater and 4.0% or less, carbon of 0.05% or greater and 0.15% or less, and titanium and an inevitable impurity as a residue.

Targeting mass production, the present invention provides an advanced method of manufacturing pure niobium plate end-group components from pure niobium plate material for superconducting high frequency accelerator cavity by means of innovative shear-blanking followed by innovative forging procedures, wherein the invention is to convert the procedure/production method from the conventional machining or waterjet cutting followed by the conventional cold forging to the whole press-forming The invention gives the drastic effects on cost-effectiveness and press-performance.

A rolled steel bar has a composition consisting, by mass percent, of C: 0.27 to 0.37%, Si: 0.30 to 0.75%, Mn: 1.00 to 1.45%, S: 0.008% or more and less than 0.030%, Cr: 0.05 to 0.30%, Al: 0.005 to 0.050%, V: 0.200 to 0.320%, and N: 0.0080 to 0.0200%, the balance being Fe and impurities. The contents of P, Ti and O in the impurities are, by mass percent, P: 0.030% or less, Ti: 0.0040% or less, and O: 0.0020% or less. Y1 expressed by the formula <1> is 1.05 to 1.18.
Y1=C+(1/10)Si+(1/5)Mn+(5/22)Cr+1.65V(5/7)S<1>. C, Si, Mn, Cr, V, and S in the formula represent mass percent of the elements. A hot-forged part having a tensile strength of 900 MPa or higher and a transverse endurance ratio of 0.47 can be obtained by the rolled steel bar.