vacuum varying pressure nitriding furnace

Model Rated power (kw) Rated Temp. (C) Effective Working Space (mm) Furnace Temp. Uniformity (C) Limit vacuum (pa) Heating-up time at empty (min) Reference Furnace-Loading(kg) Reference Weight (T) WLV-201 20 650 Dia.400×550 ≤±5 -0.08 ≤80 160 1.3 WLV-301 30 650 Dia.450×650 ≤±5 -0.08 ≤80 200 1.5 WLV-451 45 650 Dia.550×1000 ≤±5 -0.08 ≤80 400 1.8 WLV-601 60 650 Dia.650×1200 ≤±5 -0.08 ≤80 800 2.0 WLV-751 75 650 Dia.800×1200 ≤±5 -0.08 ≤80 1200 2.3 WLV-901 90 650 Dia.800×1800 ≤±5 -0.08 ≤80 1600 2.5 WLV-1101 110 650 Dia.800×2500 ≤±5 -0.08 ≤80 2200 3.5 WLV-1401 140 650 Dia.1000×3500 ≤±5 -0.08 ≤80 3000 4.0 WLV-2501 250 650 Dia.1000×5000 ≤±5 -0.08 ≤80 3500 6.0 Nitriding furnace has won china invention patent, with following advantages 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.