Abstract: A probe for immersion in a bath of liquid metal includes a gas supply pipe closed at its lower end by a stopper which melts in liquid metal, a gas collecting portion having a diaphragm which allows gas to pass but retains liquid metal for collecting the gas bubbling from the supply pipe through the metal, and a gas discharge pipe connected to the gas collecting portion. A gas circuit has one end connected to the gas supply pipe and another end connected to the gas discharge pipe. The circuit includes a gas detector and a pump mounted therein for moving the gas through the circuit. A lance through which the gas circuit extends, includes one portion of a two portion quick-acting coupling and the probe includes the other portion of the coupling. The gas is dried as it circulates in the circuit.

Abstract: A sampling device for liquid metals contains a pipe (5) and a head (1) fixed on an end thereof, wherein a sampling chamber (11) is formed, which head (1) contains a part (2) of fireproof material which partially limits the sampling chamber (11), which is provided with a supply orifice (12,46) to the sampling chamber and which is put in the pipe (5) with a narrow end (3) in such a way that the sampling chamber (11) is located entirely outside of the pipe (5). The device also has at least one small cooling plate (9) forming at least a part of the well of the sampling chamber (11) and thus also limits the sampling chamber. The part (2) is made of a material that at least during the sampling offers a structure letting gas pass.

Abstract: A sample of nodular or vermicular cast iron has magnesium and/or cerium atoms therein neutralized by the addition of selenium or sulphur in the presence of tellurium.

Abstract: A sample of nodular or vermicular cast iron has magnesium and/or cerium atoms therein neutralized by the addition of selenium or sulphur in the presence of tellurium.