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Steel for saw blade substrate and manufacturing method thereof

A manufacturing method and matrix technology, applied in the direction of manufacturing tools, temperature control, furnace type, etc., can solve the problems of insufficient hardenability, high cost, insufficient comprehensive performance, etc., and achieve the effect of uniform distribution of cross-sectional hardness

Active Publication Date: 2011-07-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of carbon and manganese in this patent, carbon and manganese are alloy elements that are easy to segregate, and the boron content is difficult to accurately control during smelting, etc., resulting in segregation and microstructure in the core of industrially produced steel plates. abnormal
[0014] The above-mentioned steel for saw blade base is not suitable for saw blades with larger diameters due to insufficient hardenability, hardenability or high cost, or insufficient comprehensive performance.

Method used

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  • Steel for saw blade substrate and manufacturing method thereof
  • Steel for saw blade substrate and manufacturing method thereof
  • Steel for saw blade substrate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] According to the composition of Example 1 shown in Table 1, it was smelted in a laboratory and cast into a 50 kg steel ingot. The steel ingot was forged and processed into a 65×120mm sample, and then rolled on a small rolling mill to produce a test steel plate with a thickness of 9mm and a width of 150mm. The heating temperature of the slab is 1190℃, and the heating and holding time is 120min. The laboratory rolling process is carried out in two parts:

[0056] One is that the final rolling temperature is 900℃, and the hot-rolled steel sheet is obtained by natural cooling after rolling;

[0057] The second is that the final rolling temperature is 945°C and the coiling temperature is 750°C. After coiling, it is slowly cooled to obtain hot rolled steel coils.

[0058] The tensile strength of the hot-rolled steel sheet for the saw blade base produced according to the above process and technical scheme meets Rm: 850~1200MPa, and the elongation is 6-13%; the tensile strength of t...

Embodiment 2

[0060] According to the composition of Example 2 shown in Table 1, it was smelted in a laboratory and cast into a 50 kg steel ingot. The steel ingot was forged and processed into a 65×120mm sample, and then rolled on a small rolling mill to produce a test steel plate with a thickness of 9mm and a width of 150mm. The heating temperature of the slab is 1150℃, and the heating and holding time is 125min. The laboratory rolling process is carried out in two parts:

[0061] One is that the final rolling temperature is 925℃, and the hot-rolled steel sheet is obtained by natural cooling after rolling;

[0062] The second is that the final rolling temperature is 900°C, the coiling temperature is 730°C, and the hot-rolled steel coil is obtained by slow cooling after coiling.

[0063] The tensile strength of the hot-rolled steel sheet for the saw blade base produced according to the above process technical scheme meets Rm: 850~1200MPa, the elongation A: 6-13%; the tensile strength of the hot-...

Embodiment 3

[0065] According to the composition of Example 3 shown in Table 1, it was smelted in a laboratory and cast into a 50 kg steel ingot. The steel ingot was forged and processed into a 65×120mm sample, and then rolled on a small rolling mill to produce a test steel plate with a thickness of 9mm and a width of 150mm. The heating temperature of the slab is 1250℃, and the heating time is 120min. The laboratory rolling process is carried out in two parts:

[0066] First, the final rolling temperature is 928℃, and the hot-rolled steel sheet is obtained by natural cooling after rolling;

[0067] Second, the final rolling temperature is 931°C, the coiling temperature is 800°C, and the hot-rolled steel coil is obtained by slow cooling after coiling.

[0068] The tensile strength of the hot-rolled steel sheet for the saw blade base produced according to the above process and technical scheme meets Rm: 850~1200MPa, and the elongation A: 6-13%; the tensile strength of the hot-rolled steel strip m...

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Abstract

The invention discloses steel for a saw blade substrate, comprising the chemical components in percentage by weight: 0.68-0.80% of C, 0.30-0.70% of Cr, 0.50-1.00% of Mn, 0.10-0.50% of Si, 0.03-0.15% of V, 0-0.0050% of Ca, 0.0050-0.010% of N, 0.005-0.04% of Alt, P less than or equal to 0.02%, S less than or equal to 0.01% and the balance of Fe and unavoidable impurities. The manufacturing method of the steel comprises the steps of: carrying out continuous casting or die casting on the smelted liquid steel and carrying out blooming after the die casting to obtain steel billet; carrying out slowcooling on the continuously cast billet or the bloomed steel billet after die casting; heating the continuously cast billet or the bloomed steel billet in a temperature range of 1100-1250DEG C, wherein the outlet temperature of a rough mill is greater than or equal to 1050DEG C, the final rolling temperature is 870-950DEG C and the rolled steel plate adopts natural cooling; or carrying out hot rolling to obtain strip steel, wherein the final rolling temperature is 870-950DEG C and coiling temperature is 720-820DEG C; and controlling within 0.1-5DEG C / s for cooling after the coiling. After thesteel is made into a saw blade and undergoes quenching and annealing, the section rigidity of whole saw blade body can be above HRC43, is distributed evenly and can satisfy the usability requirementsof the saw blades with larger diameters.

Description

Technical field [0001] The invention relates to steel for a saw blade base body, in particular to a steel for a large saw blade base body and a manufacturing method thereof. Background technique [0002] Saw blade refers to a combination of steel substrate and diamond or cemented carbide sintered or welded. The saw blade rotates at high speed to cut metal, stone, wood, cement, etc. The linear speed for cutting granite is usually 25-40m / s, and for marble cutting is 45-60m / s. For a steel substrate with a certain vibration frequency, the vibration frequency increases during the cutting process. When the additional frequency is consistent with the natural frequency, resonance occurs, which requires the steel substrate to have a high elastic limit and a high yield ratio; Due to the unevenness of the steel substrate, the lateral pressure generated during cutting causes the steel substrate to bend repeatedly, resulting in a decrease in the rigidity of the substrate or fatigue failure. ...

Claims

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Application Information

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IPC IPC(8): C22C38/24B21B37/74C21D9/24C21D1/18
Inventor 华蔚徐正其杨才定车日新
Owner BAOSHAN IRON & STEEL CO LTD
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