I HAVE A CONTAMINATION PROBLEM WITH THE VACUUM FURNACE. WHEN I LOAD CHARGE TOOL STEELS ARE TRANSFORMİNG THİS COLOUR. DOES ANY BODY HAVE AN IDEA? WHAT SHOULD BE THE FIRST STEP ?
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“When operating vacuum furnaces, situations may arise in which the hot zone and/or cold walls may become contaminated (Fig. Nos. 1 – 2). This can occur from a variety of sources: air leaks, outgassing from residues left on the parts as a result of the manufacturing or cleaning processes, vaporization of sensitive materials (e.g., chromium-bearing materials), process-induced contaminations such as carbon in the form of soot or tar, fluxes from brazing pastes, excess braze alloy as well as many other sources. Often times the work being processed is also affected (Fig. 3). The question becomes, how do we attempt to clean up our contaminated vacuum furnaces? >>>Read More
Source: VAC AERO International