Steel Forged Bars and Rings
MMC supplies the forged bars, step shafts, rings, eccentric shafts etc for a multitude of applications in various grades like carbon steel, alloy steel(creep steel, case carburising, nitriding steel etc.), stainless steel and tool & die steel. The bars are straightened to remove any twist and give superior yields in the end product
Manufacturing Process for Square and Flat Bars
The square/flat bars are made from ingots and are processed after giving required reduction ratio and discarding hot top and bottom for homogeneity. They are either processed by hot rolling or hot forging. These bars are further heat treated as per customer requirements by anyone of the following processes
- Annealing
- Normalizing
- Stress Relieving
- Quenching and Tempering
- Spheroidizing Annealing
They are also offered in bright condition by
- Proof machined upto Dia 100mmx6000mm length to Dia 700mm and 5000mm length
- Finish CNC machining as per drawing of upto 4000kg single piece
They are also offered in
- Cut to length
- Multiple lengths
- Centres on both size
Quality Check of Forged Bars and rings
Following checks are conducted in bars/rings/step shafts and reported in the TEST CERTIFICATE as per customer requirement
- Surface inspection (Magnetic Particle Inspection) is carried out of each bar end to end
- Positive Material Identification using XRF to certify in process chemistry of each bar
- 100%-dimensional verification using calibrated Vernier’s and Go No-Go gauges
- Step down testing
- Upset forging test
- NMIR (Nonmetallic inclusion rating)
- Macrostructure testing
- Microstructure phase analysis
- Grain Size
- Ultrasonic Testing for internal defects
- Radioactivity test
- Gas analysis (O, N, H)