Products

TERMS RELATING 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

A moulding system controlled by machine. An automatic moulding line operates without the intervention of the operator apart from when problems occur.

Cast iron

Ferrous metal that contains 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

Sand part which forms interior shapes of the casting (cold-box and shell-core).

Dimensional accuracy

Quality parameter which describes 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

Grey iron, GJL, a cast iron in which the graphite exists in the form of flakes. The fractured surface appears grey.

Heat treatment

Heat treatment aims at converting material properties. It 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 in which melting takes place. Source of energy is electricity (= electric furnace) or coke (= cupola furnace). In the electric furnace melting takes place in a single charge, meaning that the furnace is emptied completely or partially once a batch is ready. For example, it takes about one 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

Stage, where by means of a casting pattern, a mould is formed into the moulding sand. A half of the cast pattern is placed in the moulding box and around it will be stacked the moulding sand, 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, such as 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 possess higher yield strength and elongation than ferritic to pearlitic ductile irons.

Surface treatment

Method which aims to improve the surface quality of materials for example TiN-coating (wear-resistant).