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Many tool-producing units need in reasonably priced and effective technology of oxidation-free quenching. Nakal Company offers quenching lines based on the PKM furnaces equipped with a protective gas supply system. | 
| | PKM 3.6.2/11,5 ZK | Workpieces are heat-treated in a heat-resistant box filled with the protective gas formed in a gas panel and representing the nitrogen-methane mixture with the ratio 95% to 5%. After prescribed soaking the box is taken out onto the loading-unloading table and wheeled to a quenching bath. A gas cylinder rate is meant for 142 hours of continuous operation (near 300 charges). A monoblock rate is meant for 1100 hours (2-2.5 thousand charges). 1. PKM furnace equipped with a heat-resistant hearth and temperature control system. 2. Loading-unloading table. 3. Heat-resistant box with a nipple for gas supply. 4. Two gas cylinders (nitrogen-methane). 5. Pressure control. 6. Gas panel. 7. Set of tubular adapters More than 100 companies in Russia and CIS-countries have ordered the line. Comparative results on heating steel (for quenching) in air and in protective atmosphere t quench – 860oС, t soaking – 45 min., cooling in oil, protective atmosphere – N2+5%CH4 | Steel grade | Micrometering | | Complete decarburization, mm | Partial decarburization, mm | Total depth of decarburization, mm | | 60С2 | 0,05 | 0,10 | 0,15 | | - | 0,06 | 0,06 | | 9ХС | 0,07 | 0,02 | 0,09 | | - | < 0,01 | < 0,01 |
| Steel grade | Hardness, HRC | Heating medium | | Case | Core | | 60С2 | 8 | 52 | Air | | 49 | 52 | N2+5%CH4 | | 9ХС | 4 | 62 | Air | | 60 | 62 | N2+5%CH4 |
* including loading table |
| Наименование |
Working chamber
dimensions, mm,
length-width-height
(D-E-F) |
Overall
dimensions, mm,
length-width-height
(А-В-С) |
Box dimensions,mm,
length-width-height |
Temperature,°С,
Тmax |
Power,
kW |
Table
dimensions
L-W-H, mm |
|
PKM 3.6.2/11,5 ZK
|
600–300–200 |
2550*-1300-1600 |
400-200-150 |
1150 |
18 |
1210-570-840 |
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PKM 3.6.2/13 ZK
|
600-300-200 |
3250*-1700-1700 |
450-250-150 |
1300 |
16 |
1210-570-840 |
|
PKM 4.8.4/11,5 ZK
|
800-400-400 |
3000*-1600-1950 |
700-300-300 |
1150 |
21 |
1500-650-1100 |
|
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PGK 12.6.6/13 |
|
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 |
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PKM 6.12.5/12,5 |
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CGC 8.20/9,5 |
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