High-toughness ductile blade steel and metallurgical manufacturing method thereof

Abstract

The invention provides high-toughness ductile blade steel and a metallurgical manufacturing method thereof. The steel comprises the following chemical components in percentage by mass: 0.55 to 0.65 percent of C, 0.30 to 0.60 percent of Mn, 7.20 to 8.20 percent of Cr, 0.75 to 0.98 percent of Si, 1.55 to 1.90 percent of Mo, 0.95 to 1.45 percent of W, 0.20 to 0.40 percent of V, less than or equal to0.30 percent of Cu, less than or equal to 0.25 percent of Ni, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and inevitable impurities. The steel components can greatly improve the toughness of the steel. In the metallurgical manufacturing method, the temperature of a furnace placed with a steel ingot is between 600 and 800 DEG C, and theheat is preserved after the steel ingot is heated to between 1,140 and 1,160 DEG C; and the forging and cogging starting temperature of a radial forging machine is between 1,000 and 1,080 DEG C, and the forging ending temperature is between 850 and 950 DEG C. The method is simple and convenient to operate, and saves production cost.

Description

technical field [0001] The invention relates to a steel material, in particular to a blade steel and a metallurgical manufacturing method of the blade steel. Background technique [0002] Tool steel can usually be divided into three categories: general-purpose tool steel, general-purpose die steel and high-alloy tool steel. General-purpose tool steel is mainly used for the manufacture of general-purpose tools in the machinery industry, generally for the manufacture of tools such as cold processing and cold forming at room temperature; general-purpose die steel is mainly used for hot-working molds, plastic molds and cold-working molds Manufacturing; high-alloy tool and die steels are usually used in the manufacture of high-speed cutting tools that operate at high speeds and have high temperatures. The blade steel used in the machinery industry to manufacture cold shear blades is one of the more commonly used general-purpose tool steels, and is widely used in the manufacture ...

AI Technical Summary

Problems solved by technology

This manufacturing process has the following problems: 1) The casting ingot shape is small, which reduces the product yield and manufacturing capacity; 2) Electro-hydraulic hammer forging billet production is used, and the cost of forging billet billeting in metallurgical manufacturing plants is relatively high ; 3) Forging billet opening needs 4 fires, thereby increasing the energy consumption required for billet opening and increasing the manufacturing cost of the product; 4) Main performance indicators: low performance indicators such as bending strength, impact toughness and reticular carbide lead to low-grade products

Due to its low chromium content, the strength and toughness of the steel is still not ideal; at the same time, due to the high nickel content, the cost of the blade steel is relatively high

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