CN206986233U - Stainless-steel vacuum bright heat treatment furnace - Google Patents

Abstract

Stainless steel material production field is the utility model is related to, discloses a kind of stainless-steel vacuum bright heat treatment furnace.The stainless-steel vacuum bright heat treatment furnace, including heating chamber, cooling chamber and conveying mechanism, the heating chamber, connected between cooling chamber by sealed gate, induction heating apparatus is provided with the heating chamber and is connected with vavuum pump, also include carbon granules heating box, it is provided with the carbon granules heating box and stores carbon granules and be provided with the electric heater for heating carbon granules, the air inlet and air outlet of the carbon granules heating box are connected with heating chamber, the first blower fan for carrying out gas exchanges between heating chamber and carbon granules heating box is provided between the heating chamber and carbon granules heating box.Removed by setting carbon granules heating box to vacuumize oxygen in later heating furnace, and generate a small amount of reducibility gas carbon monoxide, being truly realized prevents handled workpiece to be oxidized, and reaches more preferable brightness effect.

Description

Stainless-steel vacuum bright heat treatment furnace

Technical field

The present invention relates to stainless steel material production field, especially a kind of stainless-steel vacuum bright heat treatment furnace.

Background technology

In order to change the metallurgical structure of stainless steel material, the residual stress inside stainless steel material is eliminated, is improved not Become rusty the corrosion resistance and mechanical performance of Steel material, is frequently necessary to be heat-treated in the manufacturing process of stainless steel material.Generally Under the conditions of heat treatment surface of stainless steel can be made to generate oxide layer at high temperature, influence performance and the use of stainless steel material Value.Oxide layer typically is can remove using means such as pickling, but pickling sewage is difficult to handle, and easily environment is damaged.

Brightness heat treatment technology is developed for this problem, brightness heat treatment refers in heat treatment process (mainly Quenching and annealing), using gas shield either vacuum state, avoid or reduce the workpiece surface being heat-treated and contacted with oxygen And aoxidize, so as to reach the light of workpiece surface or relative luster.

Such as Application No. CN201120527001.3 and Application No. CN200920114125.1 patent document institute are public What is opened is exactly on the bright heat treatment furnace of hydrogen or the nitrogen and hydrogen of ammonia decomposition as protective gas, such heat treatment Although stove can obtain more bright stainless steel work-piece, wherein employing flammable explosive hydrogen is used as protection gas, Easily have an accident, and ammonia and hydrogen preservation difficulty are larger, and cost is higher.And vacuum seamless heat treatment vacuumizes Afterwards, partial air is still contained in actual stove, easily by stainless steel oxidation can not real meaning row accomplish to avoid aoxidizing.

The content of the invention

It is true that the technical problems to be solved by the invention are to provide a kind of stainless steel that can preferably avoid workpiece from being oxidized Empty bright heat treatment furnace.

Stainless-steel vacuum bright heat treatment furnace disclosed by the invention, including heating chamber, cooling chamber and for will heat treatment The conveying mechanism that is shifted between heating chamber and cooling chamber of stainless steel work-piece, pass through sealing between the heating chamber, cooling chamber Gate connects, and is provided with induction heating apparatus in the heating chamber and is connected with vavuum pump, also includes carbon granules heating box, institute State to be provided with carbon granules heating box and store carbon granules and be provided with the electric heater for heating carbon granules, the carbon granules heating box Air inlet and air outlet be connected with heating chamber, be provided between the heating chamber and carbon granules heating box in heating chamber The first blower fan of gas exchanges is carried out between carbon granules heating box.

Preferably, the air inlet of the carbon granules heating box is located at the top of carbon granules heating box, the air-out of the carbon granules heating box Mouth is located at the bottom of carbon granules heating box.

Preferably, vertically layering sets multilayer carbon granules in the carbon granules heating box, is provided with every layer of carbon granules Electric heater.

Preferably, the particle diameter of the carbon granules is 500~3000 microns.

Preferably, the conveying mechanism is the rollgang through heating chamber and cooling chamber.

Preferably, pressure-equalizing pipe is provided between the heating chamber and cooling chamber, is provided with the pressure-equalizing pipe Equilibrated valve.

Preferably, described stainless-steel vacuum bright heat treatment furnace is provided with cooling heat exchanger, and the cooling chamber is connected with Cooling gas holding vessel, the air outlet of the cooling chamber are connected with the entrance of cooling heat exchanger, and the cooling heat exchanger goes out Mouth is connected with the air inlet of cooling chamber, and blower fan is provided between the cooling chamber and cooling heat exchanger.

Preferably, the first air inlet, the second air inlet, the first air outlet and the second air-out are provided with the cooling chamber Mouthful, first air inlet and the second air inlet are respectively arranged at the both sides of cooling chamber, and the first air inlet is located at cooling chamber Top, the second air inlet are located at cooling chamber bottom, and the first air outlet is arranged at the top of the first air inlet offside, and described second goes out Air port is arranged at the bottom of the second air inlet offside.

Preferably, the entrance of the cooling heat exchanger is provided with air exhauster, and the cooling chamber has the first air inlet and second Injection blower fan is provided with air inlet.

The beneficial effects of the invention are as follows：The stainless-steel vacuum bright heat treatment furnace is by setting carbon granules heating box to vacuumize Oxygen removes in later heating furnace, and generates a small amount of reducibility gas carbon monoxide, and being truly realized prevents handled work Part is oxidized, and reaches more preferable brightness effect.

Brief description of the drawings

Fig. 1 is schematic diagram of the present invention；

Fig. 2 is the schematic diagram of carbon granules heating box in the present invention；

Fig. 3 is the schematic diagram of cooling system in the present invention.

Reference：Heating chamber 1, cooling chamber 2, the first air inlet 21, the second air inlet 22, the first air outlet 23, second Air outlet 24, cooling heat exchanger 25, spray blower fan 26, air exhauster 27, sealed gate 3, pressure-equalizing pipe 31, equilibrated valve 32, rollgang 4, vavuum pump 5, carbon granules heating box 6, the first blower fan 61, carbon granules 62, electric heater 63, cooling gas holding vessel 7。

Embodiment

The present invention is further described below.

Stainless-steel vacuum bright heat treatment furnace disclosed by the invention, including heating chamber 1, cooling chamber 2 and for will heat at The conveying mechanism that the stainless steel work-piece of reason shifts between heating chamber 1 and cooling chamber 2, the conveying mechanism can be dolly, move Move bracket or through rollgang 4 of heating chamber 1 and cooling chamber 2 etc..

Connected between the heating chamber 1, cooling chamber 2 by sealed gate 3, sensing heating is provided with the heating chamber 1 Device and vavuum pump 5 is connected with, stainless-steel vacuum bright heat treatment furnace also includes the heating box 6 of carbon granules 62, the carbon granules 62 It is provided with heating box 6 and stores carbon granules 62 and be provided with the electric heater 63 for heating carbon granules 62, the carbon granules 62 adds The air inlet and air outlet of hot box 6 are connected with heating chamber 1, and use is provided between the heating chamber 1 and the heating box 6 of carbon granules 62 In the first blower fan 61 that gas exchanges are carried out between heating chamber 1 and the heating box 6 of carbon granules 62.

When being heat-treated, first by stainless steel work-piece be sent into heating chamber 1, be then turned on vavuum pump 5 and vacuumize, when up to After vacuum reaches requirement, the blower fan 61 of electric heater 63 and first of the heating box 6 of carbon granules 62 is opened, will be remaining in heating chamber 1 Oxygen remove, and be converted to a small amount of CO gas and enter heating chamber 1, be then turned on the induction heating apparatus of heating chamber 1, Heated up and be incubated as needed, after reaching requirement, open sealed gate 3, workpiece is sent into by cooling chamber 2 by conveying mechanism Cooled down.

In order that residual air is fully in contact with carbon granules 62, the air inlet of the heating box 6 of carbon granules 62 is located at carbon granules 62 The top of heating box 6, the air outlet of the heating box 6 of carbon granules 62 are located at the bottom of the heating box 6 of carbon granules 62.Air can be because after being heated Density reduce and floats, by the air inlet of the heating box 6 of carbon granules 62 be arranged above can to a certain extent slow down air in carbon granules Flowing velocity in 62 heating box 6, the reaction so that oxygen in air is fully in contact with carbon granules 62.Meanwhile the carbon granules Vertically layering sets multilayer carbon granules 62 in 62 heating box 6, is provided with electric heater 63 in every layer of carbon granules 62, passes through this The multi-level carbon granules 62 of kind is arranged, more can thoroughly remove oxygen, generates carbon monoxide.

The particle diameter of the carbon granules 62 is preferably 500~3000 microns, if because the particle diameter of carbon granules 62 is too small, easily in wind In the presence of be blown into heating chamber 1, and the particle diameter of carbon granules 62 is excessive, can reduce the contact area with air.

Due to larger pressure difference between heating chamber 1 and cooling chamber 2 after evacuation, be present, the area of sealed gate 3 is larger, It is big to open difficulty, is also easy to cause gate bad seals in opening process, therefore, between the heating chamber 1 and cooling chamber 2 Pressure-equalizing pipe 31 is provided with, equilibrated valve 32 is provided with the pressure-equalizing pipe 31.After the completion of heating, first turn on Equilibrated valve 32 makes heating chamber 1 and the air pressure of cooling chamber 2 reach balance, then can easily open sealed gate 3.

The specific cooling structure of cooling chamber 2 has a many kinds, such as difference according to demand can use different structures, such as Air cooling, water cooling and oil cooling etc., if but directly use extraneous air cooling, or oxidative phenomena easily occurs, in order to avoid this Phenomenon, described stainless-steel vacuum bright heat treatment furnace are provided with cooling heat exchanger 25, and the cooling chamber 2 is connected with cooling gas Holding vessel 7, the air outlet of the cooling chamber 2 are connected with the entrance of cooling heat exchanger 25, the outlet of the cooling heat exchanger 25 It is connected with the air inlet of cooling chamber 2, blower fan is provided between the cooling chamber 2 and cooling heat exchanger 25.Cooling gas stores Nitrogen or inert gas are generally stored in tank 7, is released in cooling chamber 2, the air of the inside is discharged, then by cold But gas cools down as medium to stainless steel work-piece.

In order to realize uniformly cooling by cooling gas, the first air inlet 21, the second air intake are provided with the cooling chamber 2 The 22, first air outlet 23 of mouth and the second air outlet 24, the air inlet 22 of the first air inlet 21 and second are respectively arranged at cooling The both sides of room 2, and the first air inlet 21 is located at the top of cooling chamber 2, and the second air inlet 22 is located at the bottom of cooling chamber 2, and first goes out Air port 23 is arranged at the top of the offside of the first air inlet 21, and second air outlet 24 is arranged under the offside of the second air inlet 22 Portion.The workpiece to be cooled down is positioned over the first air inlet 21 and the centre position of the short transverse of the second air outlet 24 and horizontal direction, The cooling air-flow of opposite direction can be so formed on workpiece top and bottom, the cold of opposite direction is similarly formed in workpiece two sides But air-flow, so as to improve the uniformity of cooling.And in order to improve air velocity, the entrance of the cooling heat exchanger 25, which is provided with, to be taken out Blower fan 27, the cooling chamber 2, which has, is provided with injection blower fan 26 on the first air inlet 21 and the second air inlet 22.

Claims (9)

1. stainless-steel vacuum bright heat treatment furnace, including heating chamber (1), cooling chamber (2) and for by the stainless steel of heat treatment The conveying mechanism that workpiece shifts between heating chamber (1) and cooling chamber (2), the heating chamber (1), cooling chamber pass through between (2) Sealed gate (3) connects, and is provided with induction heating apparatus in the heating chamber (1) and is connected with vavuum pump (5), its feature exists In：Also include carbon granules (62) heating box (6), be provided with carbon granules (62) heating box (6) store carbon granules (62) and The electric heater (63) for heating carbon granules (62) is provided with, the air inlet and air outlet of carbon granules (62) heating box (6) are equal Be connected with heating chamber (1), be provided between the heating chamber (1) and carbon granules (62) heating box (6) in heating chamber (1) and The first blower fan (61) of gas exchanges is carried out between carbon granules (62) heating box (6).

2. stainless-steel vacuum bright heat treatment furnace as claimed in claim 1, it is characterised in that：Carbon granules (62) heating box (6) air inlet is located at the top of carbon granules (62) heating box (6), and the air outlet of carbon granules (62) heating box (6) is located at carbon granules (62) bottom of heating box (6).

3. stainless-steel vacuum bright heat treatment furnace as claimed in claim 2, it is characterised in that：Carbon granules (62) heating box (6) vertically layering sets multilayer carbon granules (62) in, and electric heater (63) is provided with every layer of carbon granules (62).

4. the stainless-steel vacuum bright heat treatment furnace as described in claim 1,2 or 3, it is characterised in that：The carbon granules (62) Particle diameter is 500~3000 microns.

5. stainless-steel vacuum bright heat treatment furnace as claimed in claim 1, it is characterised in that：The conveying mechanism is through adding Hot cell (1) and the rollgang (4) of cooling chamber (2).

6. stainless-steel vacuum bright heat treatment furnace as claimed in claim 1, it is characterised in that：The heating chamber (1) and cooling Pressure-equalizing pipe (31) is provided between room (2), equilibrated valve (32) is provided with the pressure-equalizing pipe (31).

7. stainless-steel vacuum bright heat treatment furnace as claimed in claim 1, it is characterised in that：It is provided with cooling heat exchanger (25), the cooling chamber (2) is connected with cooling gas holding vessel (7), the air outlet and cooling heat exchanger of the cooling chamber (2) (25) entrance is connected, and the outlet of the cooling heat exchanger (25) is connected with the air inlet of cooling chamber (2), the cooling chamber (2) it is provided with blower fan between cooling heat exchanger (25).

8. stainless-steel vacuum bright heat treatment furnace as claimed in claim 7, it is characterised in that：Set on the cooling chamber (2) There are the first air inlet (21), the second air inlet (22), the first air outlet (23) and the second air outlet (24), first air inlet (21) and the second air inlet (22) is respectively arranged at the both sides of cooling chamber (2), and the first air inlet (21) is located at cooling chamber (2) Top, the second air inlet (22) are located at cooling chamber (2) bottom, and the first air outlet (23) is arranged at the first air inlet (21) offside Top, second air outlet (24) are arranged at the bottom of the second air inlet (22) offside.

9. stainless-steel vacuum bright heat treatment furnace as claimed in claim 8, it is characterised in that：The cooling heat exchanger (25) Entrance is provided with air exhauster (27), and the cooling chamber (2) has is provided with spray on the first air inlet (21) and the second air inlet (22) Penetrate blower fan (26).