Boriding

The term boriding means the enrichment of the case of a work piece with the element boron by means of a thermochemical treatment. The thickness of boride layer obtained is determined by the temperature, treating duration and material. Boride layers can be used to good effect when parts have to withstand abrasive wear. Boriding can be carried out in powder, granulate or by applying paste. If powder or granulate is used, the parts are bedded in boxes containing the boriding medium, and borided in a chamber or continuous furnace at a temperature of between 800 and 1050°C. If paste is used, a layer is applied to the parts by brushing on, dip coating or spraying on. They are then dried. The actual boriding is carried out in a retort using a controlled atmosphere at between 800 and 1000 °C . After boriding, the parts are often hardened and tempered or quenched and tempered.

Schematic structure of Micrograph of a boride layer

A two-phase boride layer on steel C45, borided with paste

Boriding media

Our range of boriding products includes a fine boriding powder, two boriding granulates with different grain sizes, a boriding paste for dip-coating and spraying on, and a boriding medium for boriding special alloys such as nickel-base materials.

Boriding media	Working temp.
Durferrit Durborid 1	850° - 1000° C
Durferrit Durborid 2	850° - 1000° C
Durferrit Durborid 3	850° - 1000° C
Durferrit Paste	850° - 1000° C
Durborid SL	850° - 1000° C

 
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