Abstract:
A composition that includes an effective amount of a quaternary ammonium silane compound; an effective amount of a benzalkonium chloride compound; between 50 volume percent and 90 volume percent of a short chain alcohol have between one and six carbon atoms; and between 10 percent and 50 percent water. The composition is effective at reducing or eliminating one or more pathogens from a contact surface and preventing recolonization for an interval of at least one hour in certain applications. In certain applications and embodiments, the pathogen eliminated can be one of at least viruses, bacteria, fungi and spores including but not limited to SARS-CoV-2.
Abstract:
A quench system includes an enclosure defining a quench chamber sized to receive hot castings, and bulk air fans in fluid communication with the quench chamber and configured to establish a bulk flow of cooling air that surrounds and extracts heat from the hot castings at a first cooling rate. The quench system also includes a pressurized cooling system in fluid communication with a plurality of nozzles within the quench chamber and configured to spray a plurality of a directed flows of cooling fluid onto the hot castings to extract heat at a second cooling rate. The quench system further includes a programmable controller configured to sequentially activate the bulk air fans to cool the casting at the first cooling rate for a first predetermined period of time, and then activate the pressurized cooling system to cool the casting at the second cooling rate for a second predetermined period of time.
Abstract:
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.
Abstract:
The invention relates to a method and a device for cooling cast metallic parts, particularly for cooling cast light metal parts (1) comprising casting cores following the casting process. The inventive method comprises the following steps: the cast part (1) is cast; the cast part (1) is cooled by lowering said cast part into a fluidized bed (3) formed by a pourable particulate through which a flow of compressed gas is directed, the speed at which the cast part (1) is lowered being regulated according to a set point cooling curve; the cast part (1) is maintained in the lowered position within the fluidized bed (3) until being cooled to a set point temperature; and the cooled cast part (1) is withdrawn.
Abstract:
Beispielsweise beim Abschreckprozess in der Wärmebehandlung wird das verwendete Gas einer Rückgewinnung zugeführt. Erfindungsgemäss wird das Gas nun nicht in einen Gasepuffer entspannt, sondern unmittelbar der Kammer (2) entnommen und mit einem Verdichter (4) auf den Druck des Hochdruckbehälters (1) verdichtet, wobei eine weitere Verdichtungsstufe (3) zugeschaltet wird, wenn der Druck in der Kammer einen Grenzwert unterschreitet. Dazu führen Leitungen (10, 11) mit Überströmreglern (12, 13) zu den einzelnen Verdichterstufen.