A forge and method of forging is provided. The forge converts an asymmetric railroad rail to a symmetric railroad rail through a combination of vertical and horizontal forging operations. The rail is linearly translated to heating and forging stations on a roller table. The asymmetric to symmetric conversion can be completed without the need for reorienting the rail except along a single translational axis.

The present application relates to the technical field of material processing, and especially relates to a method for preparing a magnesium alloy bone screw bar via room-temperature rotary forging under alternating magnetic field in conjunction with cryogenic processing and a magnesium alloy bone screw product. The method specifically comprises the following steps: preparing an ingot, extruding the ingot into a magnesium-zinc-manganese alloy bar, performing room-temperature rotary forging under alternating magnetic field for plastic deformation, wherein the strength and hardness of the magnesium-zinc-manganese alloy are improved by the work hardening effect of magnesium alloy at room temperature, and meanwhile the microstructure is regulated; additionally, via the former and later cryogenic processing, the grain size and grain orientation uniformity can be effectively regulated in the magnesium alloy microstructure, and the magnesium alloy is effectively improved in plastic deformation ability, strength and corrosion resistance, and finally a magnesium alloy bone screw bar is obtained with excellent comprehensive properties in mechanical properties, corrosion resistance and biocompatibility, which can be mechanically processed into a magnesium alloy bone screw product.

The present application relates to the technical field of material processing, and especially relates to a method for preparing a magnesium alloy bone screw bar via room-temperature rotary forging under alternating magnetic field in conjunction with cryogenic processing and a magnesium alloy bone screw product. The method specifically comprises the following steps: preparing an ingot, extruding the ingot into a magnesium-zinc-manganese alloy bar, performing room-temperature rotary forging under alternating magnetic field for plastic deformation, wherein the strength and hardness of the magnesium-zinc-manganese alloy are improved by the work hardening effect of magnesium alloy at room temperature, and meanwhile the microstructure is regulated; additionally, via the former and later cryogenic processing, the grain size and grain orientation uniformity can be effectively regulated in the magnesium alloy microstructure, and the magnesium alloy is effectively improved in plastic deformation ability, strength and corrosion resistance, and finally a magnesium alloy bone screw bar is obtained with excellent comprehensive properties in mechanical properties, corrosion resistance and biocompatibility, which can be mechanically processed into a magnesium alloy bone screw product.

The disclosure discloses a magnesium alloy for wheels, comprising in mass percentage: Al: 2-3.0 wt. %; Zn: 0.5-1.0 wt. %; Mn: 0.3-0.5 wt. %; Ce: 0.15-0.3 wt. %; La: 0.05-0.1 wt. %, the balance is Mg. The magnesium alloy of the present invention takes Al element and Mn element as main alloying elements, supplemented by trace Ce and La elements as alloying process, and the nano-scale Mn-rich precipitated phase obtained during homogenization and the segregation of rare earth elements Ce and La at the interface and grain boundary of Mn-rich precipitated phase are used to inhibit the coarsening during extrusion and forging, so as to improve the strength and plastic deformation ability of the alloy.

The disclosure discloses a magnesium alloy for wheels, comprising in mass percentage: Al: 2-3.0 wt. %; Zn: 0.5-1.0 wt. %; Mn: 0.3-0.5 wt. %; Ce: 0.15-0.3 wt. %; La: 0.05-0.1 wt. %, the balance is Mg. The magnesium alloy of the present invention takes Al element and Mn element as main alloying elements, supplemented by trace Ce and La elements as alloying process, and the nano-scale Mn-rich precipitated phase obtained during homogenization and the segregation of rare earth elements Ce and La at the interface and grain boundary of Mn-rich precipitated phase are used to inhibit the coarsening during extrusion and forging, so as to improve the strength and plastic deformation ability of the alloy.

A forging head for additive manufacturing, comprising a base portion and a forging portion. The forging portion extends from the base portion for forging a cladding layer during formation of the cladding layer by additive manufacturing. The forging head further comprising a through hole which is formed through the base portion and the forging portion, for at least one of an energy bean and an additive material to pass through during formation of the cladding layer.

A forging head for additive manufacturing, comprising a base portion and a forging portion. The forging portion extends from the base portion for forging a cladding layer during formation of the cladding layer by additive manufacturing. The forging head further comprising a through hole which is formed through the base portion and the forging portion, for at least one of an energy bean and an additive material to pass through during formation of the cladding layer.

A constructing-and-forging method for preparing homogenized forged pieces comprises: preparing preformed billets: cutting off a plurality of continuous casting billets, milling and smoothing surfaces of the billets to be welded, performing vacuum plasma cleaning operation to the surfaces to be welded, stacking the plurality of billets and sealing around the surfaces in a vacuum chamber by electron beam welding; forge-welding and homogenizing the preformed billets: heating the preformed billets to a certain temperature in a heating furnace and taking the heated preformed billets out of the heating furnace, forging the preformed billets by a hydraulic press, then using three-dimensional forging to disperse the welded surfaces such that composition, structure and inclusion of the interface areas are at the same level as those of the bodies of the billets. Cheap continuous casting billets are stacked and forge welded.

A constructing-and-forging method for preparing homogenized forged pieces comprises: preparing preformed billets: cutting off a plurality of continuous casting billets, milling and smoothing surfaces of the billets to be welded, performing vacuum plasma cleaning operation to the surfaces to be welded, stacking the plurality of billets and sealing around the surfaces in a vacuum chamber by electron beam welding; forge-welding and homogenizing the preformed billets: heating the preformed billets to a certain temperature in a heating furnace and taking the heated preformed billets out of the heating furnace, forging the preformed billets by a hydraulic press, then using three-dimensional forging to disperse the welded surfaces such that composition, structure and inclusion of the interface areas are at the same level as those of the bodies of the billets. Cheap continuous casting billets are stacked and forge welded.

Disclosed is a forming system having a first die assembly and a second die assembly with dies having die surfaces that are configured to cooperate with each other to form a die cavity therebetween so as to receive a workpiece therein. One or both of the dies includes a heater insert member that has a serpentine groove therein for receiving a flexible heater member. The flexible heater member is configured to conform with the shape of the serpentine groove. The heater insert member is position adjacent to the die surface and provides more uniform heating of the surface to form complex 3D surfaces with tailored properties.