Abstract: Wear resistant cast iron containing 3.1-3.7% carbon, 0.4-3.0% silicon, minimum 0.4% manganese, 1-7% chromium, 0-5% nickel, minimum 0.3% aluminium and 2.5-4.5% titanium.

Abstract: A vibratory cleaning apparatus applies ultrasonic energy to component parts or workpieces directly resting on a vibrator surface. The surface forms part of a conveying arrangement that moves the parts as they are cleaned. Conveyance of the parts during their vibratory cleaning provides control of the time of cleaning. In various embodiments, the conveying arrangement can be an inclined plate or surface which is the vibration imparting member, an endless conveyor through which vibrations are conducted, or a wiper driven across a vibratory plate to move the workpieces thereon. The cleaning apparatus is suitable for large scale cleaning of production line parts or individual work bench application. In preferred embodiments, a further conveying arrangement automatically delivers the parts from the bath in which the ultrasonic transducer is located.

Abstract: A case-hardened, corrosion-resistant steel article is provided which comprises, applying a coating of nickel and/or cobalt to the surface of the article and then subjecting said coated article to carburization by heating said coated article to and maintaining it at an austenitic temperature under carburizing conditions for a time sufficient to effect carbon diffusion into the surface of the steel article. The corrosion resistance of the steel may be further enhanced by applying a thin layer of a final metal coat selected from the group consisting of Cr, Sn, Pb, Zn, Cu and Cd.

Abstract: A process is provided for coating a ferrous metal article, e.g. steel or iron, with a corrosion resistant surface layer comprising first coating said article with a layer of nickel and/or cobalt, heating said coated article for a time less than 45 minutes at a temperature in excess of 725.degree. C and then applying to said first metal layer an additional layer of at least one of the metals selected from the group consisting of chromium, tin, lead, zinc, copper and cadmium.