Abstract: A process for increasing the productivity of aluminum castings from a hot chamber die casting machine, as well as a process for increasing the working life of an injection chamber for use in a hot chamber aluminum die casting machine, both of which involve the use of a passivated aluminum alloy in the machine. In the preferred embodiment, the process involves the use of an aluminum alloy which is passivated through the introduction of an amount of TiBr.sub.2, provided in amounts sufficient to retard corrosion of the steel of the hot chamber casting machine.

Abstract: An adjustable miter box for use with a miter saw having a blade includes a base having a top, a front face, a rear face, a first side and a second side, a generally vertically oriented pivot post located adjacent the rear face and being disposed in an offset location closer to the first side than to the second side, a saw guide including a vertical throughbore for matingly engaging the pivot post and defining a slot for slidingly and clampingly accommodating the blade of the miter saw, angular locking devices on the base for releasably fixing the angular position of the saw guide relative to the base, and workpiece support apparatus secured to the base for supporting and securing a workpiece to be cut by the saw while the saw is slidably engaged in the slot.