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Forging
Drop Hammer, Upset and Stamping
From our 0.5 tons Friction Drop Hammer up to our 5.5 ton Pneumatic Hammer our 5 hammers have the capability to produce forgings from
as small as 100g up to 150Kg.
We cater for a market that requires small to medium batch quantities in a variety of carbon, high alloy and stainless steels, forging
nearly 2,500 tons of material a year.
Uniquely flexible in our approach to manufacturing quantities we are able to meet low volume spares requirements up to OEM requirements
of 1,000s.
The billets for forging are heated in oil fired or electric furnaces, closely controlling the temperature to reduce the scale formation
and overheating so that the metallurgical properties are ensured in the final product. In addition, in-process inspection is carried out
at all stages and 100% inspection for visual defects after forging. The accepted forgings are duly heat treated to ensure its mechanical
properties.
Post Forge Operations
By providing heat treatment services in-house, NKH is able to maintain greater control over heat treating process. The facility comprise
batch furnaces both oil fired & electrical, continuous electrical heating furnaces, solution treatment etc. to carry out annealing, Normalising,
hardening, tempering, iso-thermal annealing, solution treatment etc. or other operations as specified by our customer. Close temperature control
and process monitoring with the help of temperature recorders ensures uniform properties duly supported by evaluation of metallurgical properties
through representative test piecesand test accordingly mentioned below on the available facilities provided by our Facilitation center, which is
NATIONAL ACCREDITION BOARD FOR TESTING AND CALIBRATION LAB (NABL) APPROVED.
Vacuum Heat Treatment of Tools And Dies Steel
• Vacuum heat treatment furnace chamber size 600 x 600 x 900 mm
Continuous Furnace
MESH BELT SIZE(WIDTH) |
400 mm (MAX.) |
FURNACE INLET OPENING HEIGHT |
80 mm (MAX.) |
HARDNING ZONE |
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LENGTH |
5500 mm |
TEMPRATURE RANGE |
850oC - 925oC |
TEMERING ZONE |
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LENGTH |
6000 mm |
TEMPRATURE RANGE |
200oC - 700oC |
QUENCHING MEDIUM |
FAST QUENCH OIL |
TYPE OF PROTECTIVE ATMOSPHERE |
METHANOL & LPG. |
Cp ( %AGE CARBON) |
0.2 TO 0.6 |
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AUTO MATICMANUAL |
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SIZE mm WEIGHT gms. |
MATERIAL LOADING |
150x80 400 ( max.) |
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SIZE mm WEIGHT gms. |
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300x80 800 ( max.) |
WASHERS |
PRE WASHER BEFORE HARDING |
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POST WASHER AFTER OIL QUENCHING |
PRODUCTION CAPACITY |
300 Kg/HRS |
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7-TONS/DAY |
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Induction Hardening
• Medium Frequency Induction Hardening Machine 90 Kw, 3 - 10 KHz InductoThermmake.
Gas Carburising
• Gas Carburising Furnace. Ø600 x 1100
• Gas Nitriding Furnace. Ø600 x 1200
Capacity: Ø600 x 1200mm, simplicity.
• Tempering Furnace
Capacity: Ø600 x 1100mm, Simplicity.
Tufftriding
• Liquid Nitriding / Tuff Triding Furnace of Western Engineers make
Cryogenics Processing
• Cryogenics Processor with Tempering Facility (-110°C to -196°C) PrimeroEnServemake. Size 400 x 1200 x 400.
Shot blasting, Grinding are all conducted in house along with Magnetic Particle Inspection.
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