Audited Supplier
Vacuum Carburizing Furnace
Vacuum carburizing is to heat the workpiece in vacuum. When it reaches the temperature above the critical point, it will stay for a period of time, degass and remove the oxide film, and then pass in the purified carburizing gas for carburizing and diffusion. The carburizing temperature of vacuum carburizing is high, up to 1030 ºC, and the carburizing speed is fast. The surface activity of carburized parts is improved by degassing and deoxidizing. The subsequent diffusion speed is too high. Carburizing and diffusion are carried out repeatedly and alternately until the required surface concentration and depth are reached.
Vacuum carburizing depth and surface concentration can be controlled; It can change the metallurgical properties of the surface layer of metal parts, and its effective carburizing depth is deeper than the actual carburizing depth of other methods.
Single chamber horizontal low pressure Carburizing gas quenching furnace (air cooling by vertical gas flow type) has many functions like carburizing, gas quenching and pressure air-cooling. Is mainly used for quenching, annealing,tempering of the die steel, the stainless steel, the high-speed steel, the higent processes like one-time high-carburizing, pulse carburizing and so on.
Characteristics
1. High intelligent and efficient. It is equipped special developed vacuum low-pressure carburizing simulation software.
2. High cooling rate. the cooling rate is increased by 80% by using high efficiency square heat exchanger.
3. Good cooling uniformity. Uniform cooling by convection from double-fans.
4. Good temperature uniformity. heating elements are evenly arranged 360 degrees around the heating chamber.
5.No carbon black pollution. The heating chamber adopts the external insulation structure to prevent the pollution of the carbon black in carburizing process.
6. Long service life , Using the carbon felt as the heat-insulation layer of the heating chamber.
7. Good carburized layer thickness uniformity, Carburizing gas nozzles are evenly arranged around the heating chamber, and the thickness of carburized layer is uniform.
8. Less deformation of the Carburizing workpiece , higher production efficiency and energy cost is saved more than 40%.
9. Smart and easy for process programming, stable and reliable mechanical action , automatically, semi-automatically or manually alarming and displaying the faults.
10. Frequency conversion control gas quenching fan, optional convection air heating, optional 9 points temperature survey, several grades and isothermal quenching.
11. With whole AI control system and an extra manual operating system.
Standard model specification and parameters
| Model | PJ-ST446 | PJ-ST557 | PJ-ST669 | PJ-ST7711 | PJ-ST8812 | PJ-ST9916 |
| Effective Hot Zone LWH (mm) | 400*400*600 | 500*500*700 | 600*600*900 | 700*700*1100 | 800*800*1200 | 900*900*1600 |
| Load Weight(kg) | 200 | 300 | 500 | 800 | 1200 | 2000 |
| Maximum Temperature(ºC) | 1350 | |||||
| Temperature control accuracy(ºC) | ±1 | |||||
| Furnace temperature uniformity(ºC) | ±5 | |||||
| Maximum Vacuum Degree(Pa) | 4.0 * E -1/6.7*E-3 | |||||
| Pressure raise rate (Pa/H) | ≤ 0.5 | |||||
| Carburizing agent | C2H2+N2 | |||||
| Carburizing pressure(mbar) | 5-20 | |||||
| Carburizing method | Multi-pulse carburizing | |||||
| Carburizing depth control | LPC intelligent process control by material | |||||
| Quench agent | N2/Ar | |||||
| Gas quench pressure(bar) | 12-25 | |||||
| Furnace structure | Horizontal, single chamber | |||||
| Furnace door opening method | Hinge type | |||||
| Heating elements | Graphit heating elements | |||||
| Heating chamber | Composition structure of Graphit hard felt and soft felt | |||||
| Gas quenching flow type | Vertical alternating flow | |||||
| IPC | YANHUA | |||||
| PLC & Electric elements | Siemens | |||||
| Temperature controller | EUROTHERM | |||||
| Vacuum pump | Mechanical pump and roots pump | |||||
Customized optional ranges
| Maximum temperature | 600-2800 ºC | ||||
| Furnace structure | Horizontal,Vertical, single chamber or multi chambers | ||||
| Door opening method | Hinge type, Lifting type,Flat type | ||||
| Heating elements | Graphit heating elements, Mo heating elements | ||||
| Heating chamber | Composed Graphit felt, All metal reflecting screen | ||||
| Gas quenching flow type | Honrizontal alternating gas flow;Vertical alternating gas flow | ||||
| Vacuum pumps | Mechanical pump and roots pump; Mechanical, roots and diffusion pumps | ||||
| PLC & Electric elements | Siemens;Omron;Mitsubishi;Siemens | ||||
| Temperature controller | EUROTHERM;SHIMADEN | ||||
- Most important: Human. Human is the most important point in every work. We have complete training courses for every new worker, and we have rating system to rate every worker to a level (junior, middle, high), different level workers are apponted to different jobs with different salary. In this rating system, it's not only the skills, but also rate in responsibility and error rate, executive power etc. By this way, workers in our factory are willing to do the best in his work.And strictly follows the quality management rules.
- Best materials and components: We only purchase the best materials on market, we know that saves 1 dollar in material would cost 1000 dollars in final. The key parts like electric components and pumps are all brand products like Siemens, Omron,Eurotherm, Schneider etc. For the other parts made in China, we choose the best factory in industry and signed product quality guranntee contract with them,to ensure every component every parts we use in the furnace is the best quality products.
- Strict Quality management: We have 8 quality check points in the processes of furnace producing, Examination in each check point is carried by 2 workers and 1 factory manager is responsible for it. In these check points, materials and components, and every aspects of the furnace are double checked to ensure its quality. At last, before the furnace leaves factory, it should be final checked with heat treatment experiments.
