Actualités industrielles

Quenching and tempering technology of ductile iron castings

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Austenitizing is the first step in the quenching of Ductile Iron Castings. The austenitizing temperature is 860-880 °C, and the holding time is 1 hour for every 25mm thick casting, which is the same as that of normalizing and annealing. After the insulation is finished, it cools quickly in the flowing air. After quenching, the castings […]

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Hardening Furnace

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Continuous hardening furnace is the tunnel type; the length of the furnace is usually long. Workpieces go through the inside of the furnace with different temperature sections. Hardening furnace consists of heating element, heat resistant material, refractory bricks, furnace front door, and back door, lifting system, hydraulic system, tipper. Each section of the furnace has […]

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STANDARD OF THE CHROME ALLOY CAST GRINDING BALLS IN BUILDING MATERIALS INDUSTRY (7)

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A.1  Under the following normal operating conditions, the ball broken rate and wear rate of the ball mill running for 2000h and 3000h are shown in Table A. 1.

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tempering heat treatment furnace

Four de trempe

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Continuous tempering furnace is to heat treating the ferrous metal product, so as the casting grinding media balls. Casting grinding media balls are now widely used in cement, mines, thermal power station, and construction works. But the qualified grinding balls, especially for high chrome grinding balls, need to do the not only the quenching but […]

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