It's the job of tertiary metallurgical plants to create unique technological properties in ultra-pure steels, super alloys, cast alloys, and nonferrous metals. These peak-performance, heavy-duty materials are used in demanding, high-tech industries such as aviation, aerospace, power generation, and automotive. There is no alternative technology in this high-end field.
VIM is a powerful process applied to melt down selected scrap and refine the resulting liquid steel. The process involves casting ingots under vacuum, which further improves final-product quality.
VIM works with dedicated vacuum chambers for melting and casting. They are connected by launder and tundish units.
The crucible comes with a vacuum-tight electricity supply and can be exchanged easily using the advanced lifting system.
It's a special advantage that the mechanical pump
system generates extra-strong vacuums.
There is also a charger that ensures clean material feeding under vacuum.
Finally, an integrated deslagging machine removes the slag from the crucible.
High-performance vacuum pumps from SMS Mevac are the heart of secondary metallurgical vacuum processes. For both recirculation or tank degassing processes, our vacuum pump technologies are tuned to your specific steel conditions and to your individual plant and production requirements.
Our vacuum pump systems precisely control the rate of pressure reduction from atmospheric level to low vacuum pressure. During the various treatment steps the vacuum level is accurately controlled to match the system’s metallurgical needs.
In order to deliver optimum results high suction capacity, low energy consumption and optimal reliability are essential elements of our design.
Vacuum Induction Melting & Casting (VIM) is a highend process for melting down selected scrap and refining the resulting liquid steel in a powerful manner. The capability to perform ingot casting under vacuum conditions further improves the final product quality. SMS Mevac supplied a 8/18 t VIM unit to a customer in the UK. The plant is to be commissioned in 2015. VIM features dedicated vacuum chambers for melting and casting connected by launder and tundish. The crucible has vacuum-tight electrical power supply and can be exchanged easily via advanced lifting system. The mechanical pump system generates extra-deep vacuum. A charger ensures clean material addition under vacuum conditions. Direct slag removal is enabled by integrated deslagging machine.
- “Clean” inductive heat transfer
- Vacuum conditions of < 0.05 mbar
- Massive degassing of steel
- No influence of ambient air (O2)
- Evaporation of tramp elements
- Narrow chemical steel analysis (in ppm range)
- Precise setting of temperature and excellent homogeneity of melt
- Vacuum casting of electrodes for remelting and semis for forging/rolling
X-eed® is the brand name of the overall SMS Mevac portfolio, expressing our continuous endeavours in development of enhanced technologies for the benefit of our worldwide customers.
X-eed® represents our pledge to meet your individual needs by means of innovative solutions, process know-how and selection of the most appropriate production routes.
Common feature of remelting processes are the melt-down of a metal electrode, the metallurgical treatment of the liquid phase and the subsequent uniquely fast solidification an ingot. The ingots produced feature superior material properties as:
- Highest cleanliness (purity)
- No macro segregation
- Extremely homogenous structure of produced ingot for excellent material properties
- No hydrogen flakes