Vanadium-titanium-chromium alloy steel ball and its manufacture method

Abstract

The vanadium-titanium-chrome alloy steel ball is made up of Fe, V, Ti, Cr, C, Si, Mn, P, and S. First cut the steel contains vanadium, titanium and chrome into squares with the size you need, and then heat it up to 1100'C-1150'C by hot press forging into balls. When balls naturally cooling to 780-830'C, rolling quench in 35-45'C water and temper in engine oil. It performs well in wearable capability, the surface rigidity reaches to HRC55-HRC60 and fragmentation rate under 0.3%. Good impact tenacity, reaches to 14J-17J, lose the round rate under 3%. High temperature intensity and erode-resistant.

Description

(1) Technical field [0001] The invention relates to a steel ball and a manufacturing method thereof, in particular to a vanadium-titanium-chromium alloy steel ball and a manufacturing method thereof. (2) Technical background [0002] Existing steel balls are generally composed of elements such as iron (Fe), carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), that is, ordinary steel or high-quality carbon It is made of steel, and its manufacturing method is to heat the steel cut into semi-finished products to 1100 ℃ ~ 1150 ℃ and put them in clean water for quenching. The temperature of the tempering furnace is not easy to control, and it is easy to make the temperature of a certain part of the furnace reach between 250 ° C and 400 ° C, so that the semi-finished product will form irreversible brittleness of the first type of steel due to uneven heating. 10J so that the breakage rate reaches more than 10%, and the hardness is low, the hardness only reaches be...

AI Technical Summary

Problems solved by technology

[0002] Existing steel balls are generally composed of elements such as iron (Fe), carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), that is, ordinary steel or high-quality carbon It is made of steel, and its manufacturing method is to heat the steel cut into semi-finished products to 1100 ℃ ~ 1150 ℃ and put them in clean water for quenching. The temperature of the tempering furnace is not easy to control, and it is easy to make the temperature of a certain part of the furnace reach between 250 ° C and 400 ° C, so that the semi-finished product will form irreversible brittleness of the first type of steel due to uneven heating. 10J so that the breakage rate can reach more than 10%, and the hardness is low, the hardness only reaches between HRC45 degrees and HRC52 degrees, and the out-of-round rate is high, reaching between 10% and 30%.

The steel ball made according to the above method also has poor high temperature resistance. When the temperature of the steel ball reaches above 200°C, its strength is significantly reduced, and its abrasion resistance is high and its corrosion resistance is poor.