Offering

TERMS RELATED TO CASTING AND MACHINING

ADI (Austempered Ductile Iron)

The excellent properties of ADI are achieved by heat treating alloyed ductile iron according a special heat treatment program.

Automatic moulding

An automated moulding line.

Cast iron

Ferrous metal containing 2.0 – 4.2% carbon. The carbon is usually in the form of graphite. Ferrous metals are divided into grey cast iron (GJL), nodular cast iron (GJS) and white cast irons.

CNC machine

Computer Numerical Controlled machine.

Core

Made of sand, forms the interior shapes of the casting (cold-box and shell-core).

Dimensional accuracy

Quality parameter describing the accuracy of the dimensions of a part compared to the drawing or CAD file.

Finishing, trimming

After casting, the remaining runners and feeders are removed by fettling.

Grey cast iron

(GJL) = cast iron in which the graphite exists in the form of flakes. The fractured surface appears grey.

Heat treatment

Aims at converting material properties, consists of heating and usually controlled cooling.

Lathe

Chipping machine tool (for rotating symmetrical materials).

Machining

General name for various machine tool methods, such as drilling, milling, lathing and grinding.

Melting furnace

The furnace where melting takes place. Source of energy can be  electricity (= electric furnace) or coke (= cupola furnace). In the electric furnace melting takes place in a single charge (the furnace is emptied completely or partially once a batch is ready). For example, it takes about 1  hour 20 minutes to melt 8 tonnes at a power of 4.3 MWh.

Mould

Mould formed from moulding sand for casting a product. The mould contains a hollow area that is the shape of the product, the runners needed to direct the molten metal and feeders to compensate for the shrinking of the molten metal.

Moulding

A stage where a mould is formed into the moulding sand  by means of a casting pattern. One half of the cast pattern is placed in the moulding box and around it the moulding sand is stacked by hand (hand moulding) or by machine (automatic moulding). The cores for making hollow interiors inside the castings are also placed in the moulds in the moulding stage.

Nodular cast iron

(GJS) = cast iron which contains 3.0 - 3.9% carbon and in which the free graphite exists in nodular form. Also called ductile iron.

Primer and powder coating

Priming/finishing. Protects material from corrosion and improves surface appearance.

Recycled metal

Left-over raw material from the manufacturing process (e.g.  plate cutting waste and end-of-life iron, aluminium, and steel products).

Roughing

Machining phase where material is chipped as effectively as possible without aiming at high accuracy or surface quality.

SSF Ductile iron

Silicon Solution Strengthened Ferritic Ductile iron has higher yield strength and elongation than ferritic to pearlitic ductile irons.

Surface treatment

Method which aims to improve the surface quality of materials, e.g. TiN-coating (wear-resistant).