Steel with excellent processing performance for gardening tool and production method thereof

Abstract

The invention discloses steel with excellent processing performances for a gardening tool and a production method thereof. The steel comprises the following components of, by weight, 0.45%-0.65% of C,0.1%-0.40% of Si, 0.5%-1.5% of Mn, 0.1%-0.5% of Cr, 0.02%-0.05% of Al, less than or equal to 0.4% of Ni, less than or equal to 0.5% of Cu, less than or equal to 0.020% of P, less than or equal to 0.010% of S and the balance Fe and inevitable impurities. The production method comprises the following steps that deoxidation is carried out by adopting Al, and time of argon blowing in tundish is larger than or equal to 10 minutes, the casting superheat degree is less than or equal to 25 DEG C, the thickness of a casting blank is 130-200 mm; charing temperature of the casting blank is larger than or equal to 500 DEG C; heating temperature is 1100-1200 DEG C, the temperature is kept for 2-5 hours, the rolling speed is 5-15 m per second, rolling start temperature is larger than or equal to 1080 DEG C, and rolling finish temperature is larger than or equal to 920 DEG C; and the cold speed is less than or equal to 20 DEG C per second, the casting blank is coiled at the temperature of 650-730 DEG C, then is put into a slow cooling pit for heat preservation and slow cooling for more than or equal to 48 hours, is cooled to below 200 DEG C, and then is air-cooled to the room temperature. According to steel with the excellent processing performances for the gardening tool and the production method thereof, the steel plate has excellent formability and wear resistance.

Description

technical field [0001] The invention relates to a hot-rolled coil and a production method thereof, in particular to a hot-rolled coil which is easy to process and produce gardening tools such as scissors and a production method thereof. Background technique [0002] At present, gardening tools such as scissors and shovels are mostly made of ordinary 50#, 55# and other medium carbon steels after forming and water quenching and tempering or SK5 and other high carbon steels after forming and oil quenching and tempering heat treatment. The high carbon hot rolled plate has high strength, The hardness is high, the yield strength ratio is generally more than 70%, the processing and forming is difficult, and heat treatment is easy to crack; 50#, 55# and other medium carbon steels have high hardness, the yield strength ratio is generally more than 60%, and there is heat treatment Insufficient hardness and poor wear resistance. In order to meet the needs of users, it is urgent to dev...

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