Generally the term Hot Work Steel includes tool steels which adopt a constant temperature about 200°C during application. Consequently, hot work applications involve the usual stresses which tool steels are subjected to, plus thermal stresses due to the contact between tools and hot materials during forming.
Heat leaves us cold.
Only very special steels are suited to hot work applications. The particular properties of BÖHLER hot work tool steels are specifically trimmed to their use at high temperatures. The cleanliness of the steel is a deciding factor for a long tool life and for resistance to heat checking. Typical applications for hot work tool steels are: pressure die casting, hot extrusion, open die forging, plastic processing and other hot applications.
If you are unable to find the material you require please check Uddeholm Grades.
The production base of Uddeholm is tool steel; however, our business idea is to sell and market tooling materials and services to tool makers, tool users, machine builders and their customers, providing the best total economy. Uddeholm have long experience in producing hot work tool steels for dies and extrusion tooling components. Uddeholm's extensive hot work tool steel range covers conventional and ESR melted grades and includes gades for die casting, extrusion tooling, forging, dies and other hot applications.
If you are unable to find the material you require please check Bohler Grades.
Electro Slag Remelted In Electro Slag Remelting the ingot is built up in a water cooled mould by melting a consumable electrode immersed in a superheated process slag. An electrical current flowing through the liquid slag, which provides the electrical resistance, generates the heat. As the slag temperature rises above the liquids temperature of the steel, the tip of the electrode melts. The reaction between slag and steel droplets results in a significant reduction in sulphur and non-metallic inclusions. The directional solidification of the ingot from bottom to top results in an ingot with a high homogeneity and freedom from macro - segregations. This gives uniform mechanical properties in the longitudinal and transverse directions after hot working. By utilizing homogenisation annealing of ingots, a high ingot break down and special heat treatment methods for structure refinement and strategy is fulfilled in optimising steel properties for an extended tool life.
ESR melted and re-melted Grades Stocked
- Uddeholm Orvar Supreme Listed above
- Uddeholm Dievar Listed above
- Uddeholm QRO 90 Listed above
- Bohler W302 Isoblock Listed above
- Bohler W360 Isoblock Listed above
Vacuum Melted & Remelted in order to obtain all the different properties specified, it is often necessary to combine various melting processes. (VMR internal Bohler description for Vacuum Arc Furnace known as VAR)
- Optimum ingot structure.
- Minimum gas contents.
- Minimum content of trace elements ( such as As, Sb, Sn, Cu)
- Highly uniform distribution of any remaining inclusions. Optimum polishability. V
- irtually isotropic properties.
- High reproducibility thanks to process automation.
Vacuum melted and re-melted Grades Stocked
- Bohler W403VMR Listed above