35kw Pit Furnace for Nitriding
|FOB Price:||US $10,000-50,000 / Piece|
|Min. Order:||1 Piece|
|Min. Order||FOB Price|
|1 Piece||US $10,000-50,000/ Piece|
|Payment Terms:||L/C, T/T, D/P, Western Union, Paypal, Money Gram|
- Model NO.: Nitriding furnace
- Place Style: Vertical
- Type: Pit Furnace
- Fuel: Electric Gas
- Rated Power: 35kw
- Maximum Load Capacity: 200kg
- Trademark: bonade
- Origin: Changzhou
- Certification: CE, ISO
- Range of Applications: Industrial
- Usage: Nitriding
- Rated Temperature: 650ºC
- Furnace Temperature Uniformity: ±5ºC
- Temperature Control Method: Pid
- Specification: φ 500mm× 650mm
- HS Code: 8514101000
According to the workpiece material and the infiltration layer requirements ranging from 3-90 hours, so that the surface of nitriding workpiece to obtain nitrogen reinforced layer, get high hardness, high wear resistance, high fatigue limit and good wear resistance.
Method of operation:
1. The mold before nitriding must be a workpiece that has been subjected to normalizing or quenched and tempered.
2. First use gasoline and alcohol scrub the surface of the workpiece, no rust, oil, dirt exists.
3. After loading into the furnace, tighten the lid to tighten the lid.
4. The furnace and the lid inlet into the cooling water for circulating water cooling. The bottom of the cooling water on the furnace is water inlet, the upper end of the water, the furnace alone into the water, separate drainage, cover all the water pipes can be in accordance with the principle of low into the high in series, by a mouth into the water, a mouth drainage.
5. Before the temperature should be sent to the first gas exhaust, exhaust flow should be more than doubled when used.
Exhaust 10 minutes later, the temperature control instrument (shown below) set to 150 ºC, automatic heating switch to open, while the side of the exhaust heating 150 ºC to keep 2h exhaust, and then set the temperature control instrument to 530 ºC, The ammonia flow is small, keep the furnace positive pressure, the exhaust port has a smaller air pressure upward, when the furnace temperature rose to 530 ºC, the constant temperature and constant flow nitriding 3-20h, then the ammonia pressure to increase a little , So that the exhaust to maintain moderate pressure, nitriding 4-70h, and then ammonia pressure is small, back nitrogen 1-2h, cut off the power, stop heating, to a small amount of ammonia, so that the furnace to maintain positive pressure, To 150 ºC below to stop the ammonia for the furnace.
Temperature control instrument
Temperature control instrument
Nitriding furnace soft nitriding heat treatment editor
In order to shorten the nitriding cycle and make the nitriding process not restricted by steel, in recent years on the basis of the original nitriding technology developed soft nitriding and ion nitriding two new nitriding process.
Soft nitriding is essentially nitriding-based low temperature nitrogen carbon infiltration, steel nitrogen atoms infiltration at the same time, there are a small amount of carbon atoms infiltration, the treatment results compared with the general gas nitriding, Low, less brittle, so called soft nitriding.
1, soft nitriding method is divided into: gas soft nitriding, liquid soft nitriding and solid soft nitriding three categories. At present, the most widely used in domestic production is gas soft nitriding. Gas nitriding is carried out in the atmosphere containing active nitrogen and carbon atoms at low temperature nitrogen and carbon permeation. Commonly used permeation media include urea, formamide, ammonia and triethanolamine, which are thermally decomposed at soft nitriding temperature Reaction, produce active nitrogen, carbon atoms. The active nitrogen and carbon atoms are absorbed by the surface of the workpiece and penetrate into the surface of the workpiece by diffusion, thereby obtaining a nitrogen-based carbonitride layer.
Gas soft nitriding temperature commonly used 560-570 ºC, because the temperature of the nitride layer hardness is the highest. Nitriding time is often 2-3 hours, because more than 2.5 hours, with the extension of time, the depth of the nitride layer is very slow.
2, nitriding furnace soft nitriding layer structure and soft nitriding characteristics: steel by soft nitriding, the surface of the outermost layer can be a few microns to tens of microns white layer, it is by the ε phase, γ `phase and Nitrogen cementite Fe3 (C, N), the secondary layer of the diffusion layer, which is mainly composed of γ` phase and ε phase composition.
Nitriding Features of Nitriding Furnaces
(1), the treatment temperature is low, the time is short, the workpiece deformation is small.
(2), not subject to steel restrictions, carbon steel, low alloy steel, tool and die steel, stainless steel, cast iron and iron-based powder metallurgical materials can be soft nitriding. The surface hardness of the workpiece after soft nitriding is related to the nitriding process and materials.
(3), can significantly improve the fatigue strength of the workpiece, wear resistance and corrosion resistance. In the dry friction conditions also have anti-abrasion and anti-bite and other properties.
(4), because the soft nitriding layer does not exist brittle ξ phase, so the nitride layer and thus has a certain toughness, not easy to peel off.
Therefore, the current production of soft nitriding has been widely used in molds, measuring tools,
|Rated voltage||380V, 3 phase, 50Hz|
|Heating element connection method||Y||YY|
|Temperature control method||Bit control or PID power adjustment|
|Empty furnace loss power||kW||≤5||≤10||≤13|
|Empty furnace heating time||h||≤2.5||≤2.5||≤2.5|
|Furnace temperature uniformity||ºC||±5|
|Maximum load capacity||kg||200||400||600|