Steel specially for agricultural cultivator wear part and production technology thereof

Abstract

The invention provides steel specially for an agricultural cultivator wear part. The steel comprises, by mass, 0.30 to 0.50% of C, 0.20 to 0.40% of Si, 1.0 to 1.5% of Mn, less than or equal to 0.035%of P, less than or equal to 0.035% of S, 0.30 to 0.70% of Cr, less than or equal to 0.20% of Cu, less than or equal to 0.015% of Ni, less than or equal to 0.080% of Ti, 0.040 to 0.12% of Al, less thanor equal to 0.0030% of V, less than or equal to 0.050% of B, less than or equal to 0.050% of Mo, less than or equal to 0.01% of Nb and the balance of Fe. In production, the components are used, heated, molded, quenched through water and finally molded. The steel specially for an agricultural cultivator wear part has toughness, plasticity, impact resistance, bending resistance, breaking resistanceand wear resistance meeting the manufacturing requirements of the wear part of the agricultural cultivator, can be quenched through tap water during heat treatment without tempering and is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of alloy steel, in particular to a special steel for agricultural machine wear parts and a production process thereof. Background technique [0002] The wear parts of agricultural machinery, such as rotary tiller, straw returning knife, pear, shovel, shovel, harrow plate, harrow blade, etc., are mostly made of high-quality carbon steel and spring steel. Spring steel is widely used due to its excellent comprehensive performance. . Among them, 60Si 2 Flat steel made of Mn is the most widely used. But the domestic existing 60Si 2 Although Mn steel has high strength and hardness, it has low plasticity and toughness, and is prone to decarburization and coarse grains when heated. The wear parts produced by it have excellent impact resistance, bending resistance, fracture resistance, wear resistance and use In terms of life expectancy and other indicators, it cannot meet the needs of actual production. More no...

AI Technical Summary

Problems solved by technology

But the domestic existing 60Si 2 Although Mn steel has high strength and hardness, it has low plasticity and toughness, and is prone to decarburization and coarse grains when heated. The wear parts produced by it have excellent impact resistance, bending resistance, fracture resistance, wear resistance and use In terms of life expectancy and other indicators, it cannot meet the needs of actual production

More notably, the existing 60Si 2 The flat steel made of Mn has poor hardenability. In order to eliminate internal stress and improve ductility and toughness when manufacturing rotary tillers, it is necessary to use quenching oil and quenching liquid for quenching treatment, and to use resistance furnace or salt bath furnace for tempering. Treatment, these treatment processes will produce waste liquid and toxic and harmful gas emissions, which will not only damage the health of employees, but also pollute the environment, which does not meet environmental protection requirements

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