HORIZONTAL HEAT-TREATMENT APPARATUS WITH UPSTREAM AND WIDE SPREADING TYPE OF PROCESSING GAS

摘要

The present invention relates to a horizontal heat treatment device of dispersing and supplying gas upward which performs surface treatment such as nitriding on an object by circulating processing gas in a heat treating furnace while various types of objects to be treated are placed into the heat treating furnace formed lengthwise in a longitudinal direction. More specifically, a plurality of gas circulation devices with a blast fan are installed in the longitudinal direction of the heat treating furnace on an upper part of a device housing forming a casing on the outside of the heat treating furnace. A gas intake unit and a gas distribution unit of a pipe frame shape in which a gas flow hole is formed are separated and arranged in accordance to a number of gas circulation devices on an inner upper part and bottom of the heat treating housing installed in the device housing in order for an object to be treated be placed inside. A gas collection pipe and a gas supply pipe extended from each blast fan are connected to the gas intake unit and the gas distribution unit. The processing gas is evenly supplied and circulated to an upper side along an entire inner space of the heat treating housing where the object to be treated is inserted. As such, the horizontal heat treatment device of dispersing and supplying gas upwards remarkably improves a performance of surface treatment for the object by reducing a dead zone in a treatment area and solving uneven distribution to the processing gas which is a troublesome problem of a horizontal gas heat treatment device.