Stone material cutting saw blade steel and its manufacturing method

A technology of stone cutting and manufacturing methods, applied in the direction of manufacturing tools, metal rolling, furnace types, etc., can solve the problems of sheet deformation and ineffective effect, and achieve the goals of reducing deformation, improving red hardness, uniform structure and hardness distribution Effect

Active Publication Date: 2008-02-06
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to increase the quenching hardness of the final oil-injected part, we have tried to increase the quenching temperature and prolong the residence time in the oil. lead to serious deformation of the sheet

Method used

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  • Stone material cutting saw blade steel and its manufacturing method
  • Stone material cutting saw blade steel and its manufacturing method
  • Stone material cutting saw blade steel and its manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] According to the design idea of ​​the above-mentioned alloy composition, the present invention has smelted 9 furnaces of steel and cast them into steel ingots, the chemical composition of which is shown in Table 4. For comparison, the components produced industrially according to the comparative invention patent 02116753.2 are shown at the same time. The steel ingot is forged into a 65×120mm sample, and then a rolling test is carried out on a small rolling mill to form a test steel plate with a thickness of 10mm and a width of 150mm. The slab heating temperature is 1200°C and the heating time is 120min. The final rolling temperature is 900-940°C, and air-cooled to a coiling temperature of 750°C after rolling.

[0074] The chemical composition of table 4 the present invention and comparative example, wt%

[0075] Example

C

Si

mn

Cr

V

N

Ca

Al

Fe

1

0.45

0.30

1.80

0.15

0.20

0.020

...

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Abstract

This invention relates to a type of steel used for saw blade for stone slotting. Account for weight the chemical composition is: C 0.45-0.60,Si 0.10- 0.60,Mn 1.30-1.80,P<=0.02,S<=0.01,V 0.05-0.20,Cr 0.15-0.30, N 0.005-0.020,Ca 0-0.0050,Al 0.005-0.040, and the rest is Fe and inevitable impurity. The process includes steps as follows: smelting, casting,; continuous casting billet use heat sending and heat packing , ensure the temperature keep above 300DEG C before it be send into plate body for heating; keep temperature for plate body heating above 1150DEG C,temperature for hot rolling above 900DEG C; cooling after rolling, then coiling, keep the coiling temperature above 700DEG C. This invention has higher hardenability then midst-carbon and low-alloy steel, especially refer to make large saw blade which diameter is above 1000mm.

Description

technical field [0001] The invention relates to a medium-carbon, low-alloy steel, in particular to a steel for a large saw blade with a diameter of more than 1000mm for cutting stone and a manufacturing method thereof. Background technique [0002] The thickness of the steel plate used for stone cutting saw blades is usually 2-10mm. The coiled plate is produced by a hot rolling mill. After the coiled plate is flattened, the user performs cutting processing, and then performs quenching and tempering heat treatment to obtain a hardness above HRC40, which is usually maintained at HRC41~45, so that the saw blade steel has good toughness while having a certain cutting hardness. At present, the commonly used steel grades on the market are 65Mn and 75Cr1, and their chemical compositions are shown in Table 1. [0003] Table 1 Chemical composition of commonly used saw blade steel, wt% [0004] steel type C Si mn P S Cr 65Mn 0.62～0.70 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/24C22C33/04C21D9/46C21D9/24B21B1/46
Inventor 江来珠华蔚欧鹏胡会军吴小弟徐鼎华
Owner BAOSHAN IRON & STEEL CO LTD
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