Alloy casting used for agricultural machines and preparation technology of alloy casting
A technology of alloy castings and agricultural machinery, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of easy fracture, poor toughness, hardness, and poor strength, so as to improve wear resistance and hardness, improve Effect of toughness and yield strength, good wear and corrosion resistance
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Examples
Embodiment 1
[0019] An alloy casting for agricultural machinery, characterized in that the alloy casting is made of the following components: C2.85%, Si 8.8%, Mn 0.7%, Ti 3.6%, Cu 3.8%, rare earth 0.05%, The balance is Fe and unavoidable impurities. V 0.2%, Sn 0.48%, B 0%, Zr 0.5%, W 0.4% are also included. Among them, the rare earth is a mixture of cerium and lanthanum, wherein lanthanum accounts for 55% of the total mass of the rare earth.
[0020] Alloy castings for agricultural machinery are prepared by sand casting. The specific sand casting process steps are as follows:
[0021] 1) Weigh the raw materials according to the proportion and preheat them at 200-350°C for 2-3 hours, then put them into the intermediate frequency melting furnace and melt them into molten iron for later use;
[0022] 2) Preheat the sand mold at 120-130°C for 10 minutes, then coat the inner wall with a modified ceramic substrate, then raise the temperature to 220-250°C and continue preheating for 20 minutes,...
Embodiment 2
[0026] An alloy casting for agricultural machinery, characterized in that the alloy casting is made of the following components: C2.8%, Si 11.6%, Mn 0.5%, Ti 3.7%, Cu 4.2%, rare earth 0.22%, The balance is Fe and unavoidable impurities. It also includes V 0.8%, Sn 0.45%, B 0.4%, Zr 1.2%, and W 0.6%. Among them, the rare earth is a mixture of yttrium and lanthanum, wherein lanthanum accounts for 80% of the total mass of the rare earth.
[0027] The preparation process of this embodiment is the same as that of Example 1.
Embodiment 3
[0029] An alloy casting for agricultural machinery, characterized in that the alloy casting is made of the following components: C2.86%, Si 10.4%, Mn 0.8%, Ti 3.8%, Cu 2.5%, rare earth 0.25%, The balance is Fe and unavoidable impurities. V 1.1%, Sn 0.55%, B 1%, Zr 0%, W 0% are also included. Among them, the rare earth is a mixture of samarium and lanthanum, wherein lanthanum accounts for 60% of the total mass of the rare earth.
[0030] The preparation process of this embodiment is the same as that of Example 1.
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Abstract
Description
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