A kind of economical, ultra-wide saw blade steel and its manufacturing method

Abstract

The invention discloses economical and ultra-wide saw steel and a preparation method thereof. The economical and ultra-wide saw steel comprises one or more of the following components in percentage by weight: 0.35%-0.45% of C, 0.10%-0.50% of Si, 0.60%-1.20% of Mn, not more than 0.030% of P, not more than 0.010% of S, 0.0010%-0.0040% of B, 0.010%-0.080% of Al, not more than 0.060% of Ti, 0.0010%-0.0080% of Ca, not more than 0.0080% of N, not more than 0.0080% of O, not more than 0.0004% of H, 0.001%-0.050% of Nb, 0.01%-0.50% of Cr, 0.01%-0.50% of Mo, 0.01%-0.50% of Ni, 0.01%-0.15% of V, and the balance of Fe and inevitable impurities, wherein (Cr / 5+Mn / 6+50B) is smaller than or equal to 0.45% and greater than or equal to 0.15%. The yield strength of the steel is greater than 850MPa; the tensile strength is 1000-1400MPa; the ductility is greater than 10%; and the charpy V-type longitudinal impact strength can be 50-90J. Through high-temperature final rolling, online water cooling and tempering processes, the steel plate which is 6.0-16.0mm thick is produced, and is processed into saw blade bodies of which the diameters are 1700-4500mm; the section of each whole saw blade body can be 30-40HRC; and the hardness value is uniform in distribution.

Description

technical field [0001] The invention relates to a steel for saw blade base body, in particular to an economical, ultra-wide saw blade steel and a manufacturing method thereof. The hardness is 30-40HRC, and the Charpy V-type longitudinal impact energy can reach 50-90J. Background technique [0002] Diamond circular saw blades are made of steel, and the cutting objects are granite, marble and other stone materials. Since the diamond saw blade rotates at high speed to cut the stone, the linear speed for cutting granite is usually 25-40m / s, and the linear speed for cutting marble is 45-60m / s. The saw blade with a certain vibration frequency will increase the vibration frequency during the cutting process, which will cause resonance phenomenon. This requires the saw blade to have a high elastic limit and a high yield ratio; secondly, due to the unevenness of the saw blade or poor installation of the saw blade, the lateral pressure generated during cutting causes the saw blade t...

Images