nickel-chromium white irons (Ni-Hard irons), have been produced for more than 50 years and are cost-effective materials for crushing and grinding. In these martensitic white irons, nickel is the primary alloying element, because3 to5%Niiseffectivein suppressing thetransformation of the austenite matrix to pearlite, thus ensuring that a hard,
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The hardness of Ni-Hard 1 is a function of its carbide content and matrix structure. The effect of carbon is shown in Figure 5. Figure 5. Effect of carbon content on hardness of Ni-Hard 1 in the as-cast condition at various silicon levels 7 A vertical pug with a Ni-Hard spiral knife and mould Table 1 • Compositions of the Ni-Hard .
Comparison of Three Ni-Hard I Alloys - OSTI. Ni-Hard containing 4.2 wt. pct. Ni. The second alloy (B2) is similar to B1 but higher in Cr, Si, ... and grinding ores, mixing concrete, pulverizing coal, .
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Ni-Hard 4 2.6 – 3.2% Carbon 8.0 – 9.0% Chromium 4.5 – 6.5% Nickel Overview. The rebuilding and hardfacing of the pulverizer mill rolls for grinding coal and cement can be successfully completed by strict adherence to welding procedures, pre-weld inspection and knowledge regarding the previous hardfacing history of the roll. The
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Ni-Hard 4 2.6 – 3.2% Carbon 8.0 – 9.0% Chromium 4.5 – 6.5% Nickel Overview. The rebuilding and hardfacing of the pulverizer mill rolls for grinding coal and cement can be successfully completed by strict adherence to welding procedures, pre-weld inspection and knowledge regarding the previous hardfacing history of the roll. The
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