The nitriding process of this furnace is finished under low vacuum condition, and the automatic pressure change and ventilation can guarantee the inside atmosphere fresh, active, quick diffusing and uniform at every corner of the furnace. This type of furnace has good sealing, is an environmental protection product as waste gases can be exhausted from the sealed water tank after being pumped by vacuum pump and treated there.
Advantages of this product (take aluminum mode H13 as an example)
1. Quick diffusing rate
1. Heat-preservation time: 8-10 hours, diffusing layer depth: 0.14~0.18mm, white layer: 0.006~0.01mm
HV1000~1200
High surface hardness
The surface hardness can reach HV1000~1200
3. Large loaded-amount, low procession cost
Using low vacuum pressure changing technology, the nitriding process of this furnace is finished under low vacuum and variable pressure condition, the fresh atmosphere infiltrated into every corner of the furnace, thus the workpieces can be stuffed closely to allow larger furnace-loaded amount. In addition, the sealing and insulation of this type of furnace is very good, obviously reducing the treatment cost, and the average cost is about only 0.4Yuan/kg (labor costs included).
4. Surface friction coefficient is small
As the low vacuum pressure changing technology makes the surface nitride layer very compact, so the friction coefficient is small on the surface.
5. Low brittleness
Periodic change of the furnace pressure can lead to the change of the nitrogen potential of furnace atmosphere, and can prevent from the appearance of Fe2N at the same time of speeding up penetrating rate. Also this process can help to reduce the brittleness, effectively avoiding the spalling (decortication) during the working course.
6. Stable performance
The furnace atmosphere and temperature are uniform and controllable, assuring the process stability and improving the quality of working nitriding.
7. Easy for operation
When the furnace is working, the inner pressure presents periodical change, so does the nitrogen potential, which allows one segment of nitride to replace two or even three segments, simplifying the process and the operation is simpler as one furnace can replace 4-5 sets.
8. Wide adaptability, uniform diffusion layer 
If the space of working face is very narrow, it maybe disadvantageous for traditional positive pressure nitride furnace to refresh and diffuse new atmosphere, and the nitridation effect not good. And just aiming at this problem, our company has developed MLV nitride furnace which can make the furnace gas spread all around every corner of the tank by low vacuum pressure changing technology, even the deepest working face can get needed layer.
Representative customers: Chang'an Automobile, Kelon Group, Jianmei Aluminum, Conglin Group, Central Asia Aluminum, Chongqing Hongjiang Machinery Factory, Chongqing Qingping Machinery Factory, Qinren Heat Treatment Factory, Qinghai Guoxing Aluminum, Northwest Aluminum Group, Jinlan Aluminum, Xinya Aluminum, Shunhua Aluminum, Qinghai Aluminum, Xi'an Aero-Engine (Group) Ltd., Huachang Aluminum, Modern Aluminum, Asia Group, Taiwan Longdian, Hengfeng Aluminum, etc. Model
 Rated power (kw)
 Rated Temp. (?)
 Effective Working Space (mm)
 Furnace Temp. Uniformity ??(?)
 Limit vacuum (pa)
 Heating-up time at empty (min)
 Reference Furnace-Loading? (kg)
 Reference Weight (T)
 
WLV-201
 20
 650
 ?400×550
 ≤±5
 -0.08
 ≤80
 160
 1.3
 
WLV-301
 30
 650
 ?450×650
 ≤±5
 -0.08
 ≤80
 200
 1.5
 
WLV-451
 45
 650
 ?550×1000
 ≤±5
 -0.08
 ≤80
 400
 1.8
 
WLV-601
 60
 650
 ?650×1200
 ≤±5
 -0.08
 ≤80
 800
 2.0
 
WLV-751
 75
 650
 ?800×1200
 ≤±5
 -0.08
 ≤80
 1200
 2.3
 
WLV-901
 90
 650
 ?800×1800
 ≤±5
 -0.08
 ≤80
 1600
 2.5
 
WLV-1101
 110
 650
 ?800×2500
 ≤±5
 -0.08
 ≤80
 2200
 3.5
 
WLV-1401
 140
 650
 ?1000×3500
 ≤±5
 -0.08
 ≤80
 3000
 4.0
 
WLV-2501
 250
 650
 ?1000×5000
 ≤±5
 -0.08
 ≤80
 3500
 6.0