Buehler, Lake Bluff, Ill., an ITW company, created the fully automatic Wilson VH3300 Vickers/Knoop hardness test system to meet virtually any requirement in the area of automated precision micro hardness testing.
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W1 steels are capable of hardening to high surface hardness and soft core which is useful in some shock applications.
Continue readingFor ledeburitic tool steels (typical 8-12%-Cr cold-work tool steels and high-speed steels) the interaction of carbides with the matrix must be taken into account, especially when these carbides are strongly oriented after plastic deformation (rolling, forging) of the pre-material.
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Austenitizing is the heat treatment in which the final alloy element partitioning between the austenitic matrix (which will transform to martensite) and the retained carbides occurs.
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After hot forming, tool steel usually is submitted to heat treatment processes that may be split into two major steps.
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After hot forming, tool steel usually is exposed to a heat treatment process done to produce a low-hardness condition.
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Sinter hardening refers to a process in which the cooling rate in the cooling zone of the sintering furnace is fast enough to transform a significant portion of the powder metal steel matrix into martensite.
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Usually, powder metallurgy steel parts having a density greater than 6.7 g/cm3 (0.242 lb/in.3) should be tempered after hardening. Recommended tempering temperatures for PM parts range from 150 to 200°C (300 to 390°F) with 175°C (350°F) being common.
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Lucifer Furnaces, Warrington, Pa., announces that a Red Devil dual chamber furnace has been added to the line of analytical equipment at Laboratory Testing Inc., Philadelphia.
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