CN2326611Y

CN2326611Y - Heat treatment apparatus

Info

Publication number: CN2326611Y
Application number: CN 98211399
Authority: CN
Inventors: 张季高
Original assignee: CHANGMAO ECONOMIC AND TRADING Co Ltd FOSHAN CITY
Current assignee: Yangge Heat Treatment Co., Ltd., Foshan City
Priority date: 1998-02-18
Filing date: 1998-02-18
Publication date: 1999-06-30
Anticipated expiration: 2008-02-18

Abstract

The utility model relates to a heater treater, which is mainly composed of a retort with a closed retort cover, a vacuum extractor, and a medium adding device, wherein, a preheater arranged in the retort is connected with the medium adding device, and an evacuation tube is arranged in a crucible. Compared with an existing device, the utility model has the function of upsurge type continuous medium and additive agent adding, and solves the problem that liquid ammonia in the retort is decomposed to generate excess hydrogen elements which penetrate to a work piece surface to form white brittle phases to break the quality of the work piece surface when a work piece carries out nitriding treatment in the retort. The thermal effectiveness is good, and the utility model has the advantages of energy saving and additive agent saving.

Description

A kind of thermal treater

The utility model relates to a kind of equipment that infiltrates strengthening type element or lubricating type element in the metallic surface

The equipment at strengthening type elements such as metallic surface infiltration nitrogen elements in the past is a kind of malleation Equipment for Heating Processing, it is mainly by retort, the penetration enhancer adding machine constitutes, during use ammonia is added in the heat treatment furnace, resolve into nitrogen element and protium under the high temperature action of ammonia in heat treatment furnace, the nitrogen element then infiltrates the metallic surface, protium is removed to prevent that protium from penetrating into the metallic surface and making the metallic surface produce white fragility phase through burning, when adopting this kind technology, to keep malleation to guarantee in the heat treatment furnace at heat treatment furnace external combustion burn off dehydrogenation element, because will keep the stove internal gas pressure is malleation, thereby a large amount of cold ammonia of essential feeding, discharge a large amount of high-temp waste gas simultaneously in stove, large quantity of exhaust gas causes a large amount of energy consumptions, and furnace atmosphere is inhomogeneous, if workpiece surface easily causes infiltration layer inhomogeneous when complicated, have a strong impact on workpiece quality.

Goal of the invention of the present utility model be to provide a kind of can infiltrate in the metallic surface strengthening type element or (with) the lubricating type element, the metallic surface do not have the uniform Equipment for Heating Processing of white fragility workpiece surface infiltration layer mutually, energy-conservation.

The utility model comprises retort, vaccum-pumping equipment, the penetration enhancer adder that has the sealed furnace cover, and wherein the top in retort is provided with preheater and communicates with the penetration enhancer adder, and the vacuum-pumping tube and the vaccum-pumping equipment that are provided with through retort bottom in the retort join.During use, earlier retort is vacuumized, utilize the negative pressure-pumping effect to add penetration enhancer in retort by the penetration enhancer adder then, penetration enhancer enters to be placed in the retort after the preheater preheating and wants on the heat treated workpiece.

Here preheater can be a coiled pipe, and penetration enhancer is that thermal source is preheating near workpiece surface temperature by coiled pipe with the electric heat source in the retort.

The penetration enhancer adder can be made of penetration enhancer source, under meter, mixing tank, liquid-drop machine, valve etc., and liquid-drop machine is loaded on the sealed furnace cover and with preheater and joins.If in the time of will adding multiple additives, can by processing requirement additive be mixed in mixing tank earlier, and then join in the retort, also additive can be joined in the retort respectively by liquid-drop machine by liquid-drop machine.

Be provided with water cooler between this external vaccum-pumping equipment and vacuum-pumping tube so that will cool off from the hot waste gas that retort comes out.

The utility model compared with the prior art, owing to adopted tidal bulge formula evacuation process and penetration enhancer preheating method, so both guaranteed that penetration enhancer (ammonia) arrived workpiece surface and can in time decompose and penetrate into workpiece surface, can in time waste gas be drained simultaneously, avoid protium to penetrate into workpiece surface and formed white fragility phase, vaccum-pumping equipment take away heat that waste gas loses be waste gas with heat, avoided undecomposed ammonia is taken away, saved energy consumption, additive joins in the retort under negative pressure condition, not only made things convenient for additive to enter in the retort, and can add multiple additives simultaneously, place preheater in the retort and utilize the electric heat source in the retort that additive is carried out preheating, make temperature after the additive preheating more near workpiece surface temperature, can in time decompose and penetrate on the workpiece surface when making ammonia arrive workpiece surface, improved the homogeneity of workpiece surface infiltration layer.

Fig. 1 is the utility model structural representation;

Fig. 2 is a lateral plan of the present utility model.

Now reaching embodiment in conjunction with the accompanying drawings describes in further detail the utility model:

As shown in the figure; the utility model is mainly by the retort 1 that has sealed furnace cover 4; vaccum-pumping equipment 2; penetration enhancer adder 3 constitutes; wherein the top in retort 1 is provided with preheater 5 and communicates with penetration enhancer adder 3; the vacuum-pumping tube 6 that is provided with through retort 1 bottom in the retort 1 joins with vaccum-pumping equipment 2; here preheater 5 can be a coiled pipe; penetration enhancer adder 3 can be by penetration enhancer source 7; under meter 8; mixing tank 9; liquid-drop machine 10; valve 11 formations such as grade; liquid-drop machine 10 is loaded on the sealed furnace cover 4 and with preheater 5 and joins; by liquid-drop machine 10 multiple gases and multiple liquid while or priority are added in the retort; be provided with water cooler 12 at vaccum-pumping equipment 2 and 6 of vacuum-pumping tubes; retort 1 and 4 on retort lid are provided with lock packing 13; retort 1 top is provided with water jacket 14; be not subjected to high temperature action and sealing property is lost with protection lock packing 13; cause retort gas leakage; in addition; retort lid 4 is provided with electric pushrod device 15 electric pushrod devices 15 mainly by cantilever 16; drive the push rod 17 that cantilever 16 moves up and down; be fixed in retort 1 bottom and drive the electric pushrod 18 that push rod 17 moves up and down; the axle sleeve 19 that is fixed on the retort 1 constitutes; push rod 17 loose joints are in axle sleeve 19; the arm end of cantilever 16 is provided with the handle 21 that has trip switch 20; can press trip switch 20 during use and can open and close retort lid 4 easily, and the retort lid be removed from the retort mouth by handle 21 by electric pushrod device 15.

Claims

1, a kind of thermal treater, comprise the retort, vaccum-pumping equipment, the penetration enhancer adder that have the sealed furnace cover, it is characterized in that top in retort is provided with preheater and communicates with the penetration enhancer adder, the vacuum-pumping tube and the vaccum-pumping equipment that are provided with through retort bottom in the retort join.

2, thermal treater according to claim 1 is characterized in that preheater can be a coiled pipe.

3, according to claim 1,2 described thermal treaters, it is characterized in that the penetration enhancer adder can be made of penetration enhancer source, under meter, mixing tank, liquid-drop machine, valve etc., liquid-drop machine is loaded on the sealed furnace cover and with preheater and joins.

4, according to claim 1,2,3 described thermal treaters, it is characterized in that between vaccum-pumping equipment and vacuum-pumping tube, being provided with water cooler.

5, according to claim 1,2,3,4 described thermal treaters, it is characterized in that retort covers is provided with the electric pushrod device, the electric pushrod device mainly by cantilever, drive push rod that cantilever moves up and down, be fixed in that the retort bottom drives the electric pushrod that push rod moves up and down, the axle sleeve that is fixed on the retort constitutes, the push rod loose joint is in axle sleeve, and the arm end of cantilever is provided with the handle that has trip switch.

According to claim 1,2,3,4,5 described thermal treaters, it is characterized in that 6, be provided with lock packing between retort and retort lid, retort top is provided with water jacket.