6119results about "Quenching devices" patented technology

A process for the thermal deposition coating of a workpiece, said process comprising the steps of: (c) thermally depositing a coating on a metallic surface of a workpiece from a deposition head wherein at least one condition selected from the group of: coating deposition rate onto said surface, relative motion between the surface and said deposition head, and cryogenic coolant application rate onto said workpiece is controllable; (d) substantially simultaneously measuring temperatures at a plurality of locations over the metallic surface of the workpiece; (c) determining an average temperature of the temperatures measured in step (b); (d) comparing the average temperature to a preselected minimum temperature and a preselected maximum temperature for the workpiece; and (e) adjusting at least one of the controllable conditions if said average temperature is not between the preselected minimum temperature and the preselected maximum temperature for the workpiece. Standard deviations of all temperature readings and controlling the relative motion speed between the thermal coating deposition head and the workpiece provide another improvement for obtaining temperature uniformity over the workpiece surface.

A nozzle assembly for a kinetic spray system includes a convergent portion, a throat portion, and a divergent portion, each cooperating together to define a passage therethrough for passing a mixture of powder particles suspended in a flow of a high pressure heated gas. The nozzle assembly further includes an extension portion attached to the divergent portion and extending to a distal end a pre-determined length from the divergent portion of the nozzle assembly. The extension portion permits a dragging force exerted on the powder particles by the flow of high pressure heated gas to act upon the powder particles for a longer duration of time, thereby permitting the powder particles to accelerate to a greater velocity than has been previously achievable.

Iron-based alloys and articles in strips, sheets, workpieces and the like are converted into high strength steel with a minimum of cost, time and effort, including producing dual phase materials. This is achievable by extremely rapid micro-treating of low, medium, and high carbon iron-based alloys and articles by rapid heating and rapid cooling at least a portion of the alloy/article. This heating step involves nearly immediately heating the iron-based alloy to a selected temperature above its austenite conversion temperature. Then, the alloy is immediately quenched, also at an extremely fast rate, on at least a portion of the iron-based alloy in a quenching unit adjacent the heating unit. This procedure forms high strength alloy in a desired area, depending upon where the treatment was performed.

The invention relates to a method for producing hardened structural parts from sheet steel. The method includes shaping at least one shaped part made of sheet steel provided with a cathodic corrosion protection coating, performing any required final trim of the shaped part and possibly any required punching, or the creation of a perforation pattern, subsequently heating the shaped part, at least over partial areas, under the admission of atmospheric oxygen to a temperature which permits austenizing of the steel material, and thereafter transferring the structural part to a mold-hardening tool and performing mold-hardening in the mold-hardening tool, wherein the structural part is cooled by the contact with and pressing by the mold-hardening tool and is hardened thereby.

A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Ti comprised between Te−10° C. and Te, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Ti up to a temperature Tm comprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C./s, V being the heating rate between the temperature Ti and the temperature Tm, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature Tm for a time tm comprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

The invention has the purpose of providing a water quenching and cooling method and device for ultrahigh-strength strip steel. The device comprises an inlet tension roll (2), an outlet tension roll (16), and a water quenching and cooling tank (5), wherein water quenching nozzles (8) and a withdrawing and straightening machine (10) are arranged in the cooling tank; the cooling tank is connected with a gas sealing device (4), a gas circulating device (6), a water circulating device (9), a water sealing device (14), a drying device (15), a strip steel operating line centering device (3) and a tension control system (17); the multiple water quenching nozzles (8) in the front section of the water quenching and cooling tank eject high-pressure water to cool the strip steel when the strip steel to be cooled enters the water quenching and cooling tank (5) through the inlet tension roll (2); the steel plate passes through the withdrawing and straightening machine (10) arranged on the lower part of the water quenching and cooling tank (5) after being cooled to 250 to 350 DEG C; the shape of the strip steel plate is straightened by a mild straightening mode; the strip steel after being cooled and straightened is transferred out of the water quenching and cooling device through the outlet tension roll (16); and the rapid cooling can be realized and the ultrahigh-strength steel plate with a good shape can be obtained at the same time.

A blank cut from a strip of hardenable hot-formed steel is heated in a furnace to a temperature which is smaller than an Ac₃ transformation point in an iron carbon diagram. A first region of the blank is then heated in a conductive heating station to a temperature above the Ac₃ transformation point and subsequently hardened in a hot forming and hardening tool to produce a steel part with at least two microstructured regions of different ductility.

The present invention provides a method of hot pressing using hot rolled and cold rolled steel sheet or Al-based plated steel sheet or Zn-based plated steel sheet enabling a strength of at least 1200 MPa to be obtained after high temperature forming and with extremely little possibility of hydrogen embrittlement and such hot pressed parts, that is, a method of hot pressing a high strength automobile parts comprising using steel sheet containing as steel compositions by wt % C:0.05 to 0.5% or steel sheet plated mainly with Al or Zn to produce automobile members by hot pressing during which making the heating temperature before pressing Ac₃ or more to 1100° C. or less, making the hydrogen concentration in the heating atmosphere 6 vol % or less, and making the dew point 10° C. or less and such hot pressed parts.

To produce a metallic shaped part (1), in particular a vehicle body part, from a semifinished product (2) made of an unhardened hot-workable steel sheet, first of all the semifinished product (2) is formed by a cold-forming method, in particular a drawing method, into a part blank (10) (process step II). The part blank (10) is then trimmed at the margins to a marginal contour (12′) approximately corresponding to the part (1) to be produced (process step III). Finally, the trimmed part blank (17) is heated and press-hardened in a hot-forming tool (23) (process step IV). The part (1) produced in the process already has the desired marginal contour (24) after the hot forming, so that the final trimming of the part margin is dispensed with. In this way, the cycle times during the production of hardened parts of steel sheet can be considerably reduced.

The invention relates to a conical-face spray nozzle without blockage or air resistance and a method for forming conical-face aerial fog. The conical-face spray nozzle comprises a fluid mixing ejector, wherein the ejector is provided with a first conical-face fluid slit, a second conical-face fluid slit and a conical-face mixing ejection slit; the first fluid slit and the second fluid slit are partitioned with a certain angle and converged into the mixing ejection slit at the tail end; first fluid and second fluid which are converged into the mixing ejection slit by the first fluid slit and the second fluid slit are fully mixed and atomized by the mechanical synergism of a floating ring machine rotating at high speed and ejected in a conical face along the mixing ejection slit; and accordingly, the conical-face spray nozzle of the invention prevents an ejecting shape and angle of an ejecting medium from the influence of air pressure and flow and can eject according to the design shapeand angle.

The invention relates to a quenching machine of a steel ball, which pertains to the technical field of quenching facilities of metal materials. The quenching machine of the steel ball comprises: a steel ball lifting mechanism which is used for conveying the rolling-formed steel balls; a ball-feeding mechanism which is used for accepting the steel balls conveyed by the steel ball lifting mechanism and is connected with the steel ball lifting mechanism; at least one set of steel ball spiral separating quenching mechanisms which are used for conducting a quenching treat to the steel balls fed by the ball-feeding mechanism and is connected with the ball-feeding mechanism; conveying mechanisms of quenching mediums which have the same quantity with the steel ball spiral separating quenching mechanisms and are used for providing the quenching mediums to the steel ball spiral separating quenching mechanisms and connected with the steel ball spiral separating quenching mechanisms. The invention has the advantages that: the steel balls can obtain inside and outside uniform quenching effects and the hardness (HRC) thereof can reach 60-70; the steel ball lifting mechanism, the ball-feeding mechanism, the steel ball spiral separating quenching mechanisms and the conveying mechanisms of the quenching mediums can be coordinated with each other, thus improving the quenching efficiency in unit time by more than 5 times than the prior art.

By the present invention, during forming of a steel sheet having a tensile strength of 400 MPa or greater into a press-formed part comprising a flange part and other portions by press forming, by heating the steel sheet to a temperature range of 400-700°C and then press forming the heated steel sheet using draw forming, at which time this state is maintained for 1 to 5 seconds at the bottom dead center of forming, shape changes such as springback can be suppressed, the dimensional precision of a panel can be enhanced, and the desired mechanical characteristics can easily be obtained in the press-formed part.

Apparatus for heat-treating an elongate structural body part made from a blank compressed while being soft or from steel strip of hardenable 22 Mn B5 mod. steel sheet with a thickness of 1 mm to 3 mm, includes an apparatus for positioning the structural body part in substantially upright disposition. Placed in surrounding relationship to the structural body part is an induction element which can move from bottom to top, thereby being able to follow a contour of the structural body part and allowing to at least partially heat the structural body part to an austenitizing temperature suitable for hardening. Disposed adjacent to the induction element is a cooling unit which follows the induction element in movement direction. The induction element and the cooling unit are moveable relative to one another and connected to a tool carriage which is mounted to a column for movement in a vertical direction, in a transverse direction to the column and about a horizontal axis.

A process for hot stamping a steel component is described. The hot stamping process enables the formation of one or more regions of the component to exhibit specific physical properties different than other regions of the component. The various processes are particularly well suited for forming a variety of automobile structural members.

Provided is a steel sheet for a formed member having enhanced ductility, a formed member, and a method for manufacturing the formed member, and more particularly, to a steel sheet for making a formed member having high strength and ductility such as an automotive structural member and a reinforcing member, a formed member, and a method for manufacturing the formed member. The steel sheet for a formed member has enhanced ductility, and includes, by weight %, C: 0.1% to 1.0%, Si+Al: 0.4% to 3.0%, Mn: 0.1% to 5.0%, P: 0.0001% to 0.1%, S: 0.0001% to 0.03%, N: 0.03% or less (but not 0%), and the balance of Fe and inevitable impurities. The formed member having high strength and ductility that can be used for forming an automotive structural member, a reinforcing member, etc. In addition, the formed member can be used for a heat-treatable impact resistant member.

By the present invention, during forming of a steel sheet having a tensile strength of 400 MPa or greater into a press-formed part comprising a flange part and other portions by press forming, by heating the steel sheet to a temperature range of 400-700°C and then press forming the heated steel sheet using crash forming, at which time the average temperature difference between the flange part and the other portions of the press-formed part immediately after forming is kept to within 100°C, shape changes such as springback can be suppressed, the dimensional precision of a panel can be enhanced, and the desired mechanical characteristics can easily be obtained in the press-formed part.