Intermediate-carbon high-speed cutting saw blade matrix steel and production method thereof

Abstract

The invention discloses an intermediate-carbon high-speed cutting saw blade matrix steel and a production method thereof. The steel comprises the following components in percentage by weight: 0.20-0.40% of C, 0.10-0.30% of Si, 0.45-0.63% of Mn, not more than 0.010% of P, not more than 0.005% of S, 0.008-0.020% of Ti, 0.80-1.20% of Cr, not more than 0.005% of N, 0.020-0.050% of Al, 0.10-0.20% of Ni, 0.030-0.050% of V and the balance of Fe and inevitable impurities, wherein Als / N is not less than 30%, Mn +Cr is 1.45-1.85. The production method comprises the following steps of: desulfurizing molten iron, smelting in a converter, carrying out vacuum treatment, casting continuously, hot-rolling continuously, cooling, coiling, leveling, quenching and tempering. Facts prove that the steel has pure steel quality, strong toughness, high wearing resistance and low cost at the same time. The production method of the steel is simple in process and stable in product property.

Description

technical field [0001] The invention belongs to the technical field of steel preparation, and specifically refers to a medium-carbon high-speed cutting saw blade base steel and a manufacturing method thereof. Background technique [0002] Saw blade base steel is the main raw material for the manufacture of saw blade bases for cutting stone, and is mainly used in the stone processing industry. According to the classification of materials, the commonly used materials for the base of stone cutting saw blades produced in China mainly include 75Crl, 8MnSi, 80CrV, 65Mn, 45 steel and other materials, 45 steel is ordinary carbon steel, and 65Mn is ordinary spring steel. The fire performance is relatively poor. 75Crl, 8MnSi, and 80CrV steel contain alloy elements such as Cr and V. The quality of the saw blade is greatly improved compared with 65Mn. However, because it is a high-carbon, high-strength steel, it is produced by continuous casting and hot rolling. , there is considerable...

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Problems solved by technology

This steel has a high yield strength, which can reach 1255-1710Mpa, but due to the high carbon content in its composition, the plastic toughness and weldability of the steel are relatively low, so it cannot be widely used so far.