A furnace roll can be chemically correct and still fail because a bearing seized, a floating end could not move, or a narrow product rail loaded the center of the roll more severely than the purchase drawing implied. The hot-zone body, shafts, supports, bearings, seals, coupling and drive form one […]
Furnace Roll Failure Prevention: Control the Whole Rotating System Keep Reading »
A radiant tube with an open crack may also have a bowed leg, a thin burner-side wall and a support that no longer carries its share of the weight. Calling the event “oxidation” or “creep” too early can hide that interaction. The crack is the final visible event; the investigation
Radiant Tube Failure Analysis: Separate Wall Loss, Deformation and Cracking Keep Reading »
A furnace tray, radiant-tube bend and large furnace base may all be specified in heat-resistant cast steel, yet require different moulding routes. The correct question is not which casting process is “best.” It is which route can repeatedly make the critical geometry, material condition and inspection package at the expected
Investment, Sand or Lost Foam Casting? Select the Process From the Furnace Part Keep Reading »
An alloy table can tell you what a material contains. It cannot tell you whether a loaded tray will remain flat after repeated heating, whether its scale will stay attached in a particular atmosphere, or whether a thick rib junction will cast soundly. Those answers require the alloy, fixture geometry
How to Select Heat-Resistant Cast Alloys for Furnace Baskets and Trays Keep Reading »
When a heat treatment basket comes out of service with a dropped corner, an open crack or a bowed floor, the tempting conclusion is that the alloy was wrong. Sometimes it was. Often, however, the damaged basket is recording several events at once: the way it was cast, where the
Heat Treatment Basket Failure Analysis: Read the Damage Before Replacing the Basket Keep Reading »
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