Heating box of powder metallurgy sintering furnace
A powder metallurgy and heating box technology, applied in the field of powder metallurgy firing, can solve the problems of product geometric shape deformation, waste of space resources, lowering the qualification rate of cemented carbide manufacturing, etc., to achieve good sealing performance, uniform heating, and avoid defective products. higher rate effect
Inactive Publication Date: 2012-05-16
俞炳金
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Problems solved by technology
The vacuum sintering furnace is equipped with heating materials around, while the overpressure sintering furnace is equipped with heating materials at the left, right and lower parts. During the sintering process of cemented carbide products, the heating degree of each part of these two sintering furnaces is different. The product There are fatal defects such as density gradient, hardness gradient, strength gradient, magnetic gradient, and uneven distribution of binder phase in the internal structure and various physical performance indicators. At the same time, it also causes serious deformation of the product's geometric shape, which greatly affects the product's hard alloy. The service performance and life of the product reduce the qualification rate of cemented carbide manufacturing; in addition, due to the volume limitation of the smelted product, the layout of the furnace liner cannot fully adapt to its size, or waste space resources to a certain extent
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[0012] Such as figure 1 As shown, the heating box of the powder metallurgy sintering furnace described in the utility model includes a heating box support 2, a graphite partition 3, a ceramic plate 4 and a door frame 6, and a heating box for powder metallurgy heating is arranged in the heating furnace, and the box A heating box support 2 composed of an outer frame, a base and a plurality of partitions is arranged inside the body 1, and a slot 5 is arranged at a fixed interval on the inner wall of the heating box support 2, and the positions of the slots 5 on the two side walls correspond to each other; Graphite partitions 3 are inserted into the slots 5, and a plurality of ceramic plates 4 are stacked on the upper side of each graphite partition 3; a door frame 6 is arranged on the outside of the heating box support 2, and grooves are respectively provided on the upper and lower sides of the door frame 6. 8 is used to insert the door body 7 to maintain a good seal. The depth o...
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The utility model relates to a heating box of a powder metallurgy sintering furnace. The heating box comprises a heating box support, graphite partition plates, ceramic plates and a door frame, wherein the heating box support is arranged in a box body, and a plurality of slots are arranged on the inner wall of the heating box support at fixed interval and the slots on the two sides are opposite; the graphite partition plates are inserted in the slots, and a plurality of ceramic plates are overlayed on the upper side of each graphite partition plate; and the outer side of the heating box support is provided with the door frame, the upper side and the lower side of the door frame are respectively provided with a groove, and the depth of an upper part frame body is greater than that of a lower frame body. The heating box provided by the utility model has beneficial effects that the slots and the graphite plates and the ceramic plates which are matched with the thickness of slotted holes are arranged, the structure in the box can be adjusted by timely adjusting the graphite plate and the ceramic plate so as to lead the size of a metallurgy product to match with the heating space; and the heating is uniform, the sealing property of a door plate is good, and the defect of the higher defective rate is avoided.
Description
technical field [0001] The utility model relates to the technical field of powder metallurgy firing, in particular to a heating box of a powder metallurgy sintering furnace. Background technique [0002] There are mainly two types of sintering furnaces for powder metallurgy products currently used, one is vacuum sintering furnace and the other is overpressure sintering furnace. The vacuum sintering furnace is equipped with heating materials around, while the overpressure sintering furnace is equipped with heating materials at the left, right and lower parts. During the sintering process of cemented carbide products, the heating degree of each part of these two sintering furnaces is different. The product There are fatal defects such as density gradient, hardness gradient, strength gradient, magnetic gradient, and uneven distribution of binder phase in the internal structure and various physical performance indicators. At the same time, it also causes serious deformation of t...
Claims
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IPC IPC(8): F27B5/00F27B21/00F27D5/00
Inventor 俞炳金
Owner 俞炳金