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Steel belt for bimetal saw back and production technique thereof

A production process and bi-metal technology, applied in the field of saw back steel belt and its production process, can solve the problem of no improvement in materials and production processes, poor performance of the saw back material of bi-metal saws, and high-performance bi-metal saws. The problem of high production cost, to achieve the effect of strong production process operability, conducive to market promotion and application, and important strategic significance

Active Publication Date: 2012-09-19
HANGZHOU IRON & STEEL GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the saw back materials of bimetal saws have poor performance. Although some have excellent performance, they are expensive and generally not cost-effective. It is necessary to continue to optimize the production process. Therefore, the bimetal saw The research on sawback materials has very important strategic significance and high economic value
[0005] The Chinese patent application with the application number 200610039788.2 discloses a bimetallic hand saw blade and its production method, including a sawtooth body and a sawback body, the sawtooth body and the sawback body are connected by a silver alloy, and its production method mainly uses the existing The saw tooth body and the saw back body are used to prepare the bimetallic hand saw blade. Although the bimetallic hand saw blade has good performance, the saw tooth body and the saw back body are still commercially available products. The material and production process of the saw back body Without any improvement, the saw body still needs to be purchased, the high-performance saw body is still imported, and the high production cost of the high-performance bimetal saw is still not solved, and the performance of the saw back material of the bimetal saw produced by the manufacturer is not good. , expensive technical issues

Method used

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  • Steel belt for bimetal saw back and production technique thereof
  • Steel belt for bimetal saw back and production technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The basic flow of the production process: EAF primary refining→LF refining→VD refining→continuous casting→rolling.

[0080] The following percentages are all in mass percent:

[0081] (1) EAF primary refinement:

[0082] The raw material adopts 40% molten iron and 60% scrap steel, and the raw material is 100 tons in total. The mass percentage content of As in the molten iron is 0.0080%. Add high-chromium iron (FeCr65C9.5, including 9.5% carbon, 65% chromium, Less than 5% other impurities and the balance is iron) 10Kg / ton raw material and medium ferrochromium (FeCr65C3.0, including 3.0% carbon, 65% chromium, less than 5% other impurities and the balance is iron) 18Kg / 1 ton of raw material, pure nickel plate 7.4Kg / ton of raw material, add quicklime, the amount of quicklime added is 55Kg / ton of raw material, initial smelting in the EAF primary smelting furnace at 1550 ° C ~ 1680 ° C for 50 minutes, put steel after the initial smelting, put steel The temperature is 1660°...

Embodiment 2

[0092] The basic flow of the production process: EAF primary refining→LF refining→VD refining→continuous casting→rolling.

[0093] The following percentages are all in mass percent:

[0094] (1) EAF primary refinement:

[0095] In terms of mass percentage, the raw material adopts 40% molten iron and 60% steel scrap, and the raw material is 100 tons in total. The mass percentage content of As in the molten iron is 0.0100%. Add high-chromium iron (FeCr65C9.5, including 9.5% carbon, 65% chromium, less than 5% other impurities and the balance is iron) 12Kg / ton raw material and medium chromium iron (FeCr65C3.0, including 3.0% carbon, 65% chromium, less than 5% other impurities and the balance Iron) 17Kg / ton raw material; pure nickel plate 7.3Kg / ton raw material, add quicklime, the amount of quicklime added is 54Kg / ton raw material, initial smelting in EAF primary smelting furnace at 1550℃~1680℃ for 52min, put Steel, the temperature of putting steel is 1648 ℃, obtains the molten s...

Embodiment 3

[0105] Basic process of production process: EAF primary refining→LF refining→VD refining→continuous casting→rolling

[0106] The following percentages are all in mass percent:

[0107] (1) EAF primary refinement:

[0108] In terms of mass percentage, the raw material adopts 35% pig iron block and 65% steel scrap, the raw material is 100 tons in total, the mass percentage content of As in molten iron is 0.0090%, and high chromium iron (FeCr65C9.5, including 9.5% carbon , 65% chromium, less than 5% other impurities and the balance is iron) 14Kg / ton of raw materials and medium ferrochromium (FeCr65C3.0, including 3.0% carbon, 65% chromium, less than 5% other impurities and balance The amount is iron) 10Kg / ton of raw materials; pure nickel plate 7.8Kg / ton of raw materials, adding quicklime, the amount of quicklime added is 48Kg / ton of raw materials, in the EAF primary smelting furnace at 1550 ° C ~ 1680 ° C for 43 minutes, after the initial smelting Putting steel, the temperatur...

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Abstract

The invention discloses a steel belt for a bimetal saw back, which comprises the following components in percentage by mass: 0.45-0.65% of C, 0.2-0.8% of Mn, 0.05-0.5% of Si, 1-2.8% of Cr, 0.1-0.45% of Mo, 0.5-1% of Ni, 0.01-0.09% of Nb, 0-0.03% of S, 0-0.03% of P, 0-0.7% of V, 0-0.3% of Cu, 0-0.5% of impurity and the balance of Fe. The steel belt has the advantages of favorable wear resistance, high strength and high toughness, and has favorable firmness when being welded with high-speed steel M42. The invention also discloses a production technique of the steel belt for a bimetal saw back, which comprises the following steps: preliminary smelting, preliminary refining, vacuum refining, continuous casting and rolling. The production technique has the advantages of high operability, favorable controllability and low production cost, and can easily implement industrial production.

Description

technical field [0001] The invention relates to the field of steel strips and their production techniques, in particular to a steel strip for the saw back of a bimetal saw and its production techniques. Background technique [0002] A general saw consists of two parts, the saw teeth and the saw back. Since the saw teeth and the saw back play different roles during use, in order to enhance the wear resistance of the saw while maintaining high strength and toughness, the saw teeth and the saw back are two parts. It is better to use different metal materials so that the saw has better sawing performance, wear resistance and toughness. The saw with different metals for the saw teeth and saw back is called a bimetal saw. The invention of bimetallic saws has attracted more and more attention, and has been widely used in various fields due to its advantages of high wear resistance, high red hardness, not easy to break the saw teeth, and long service life. [0003] At present, bime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48
Inventor 胡文豪李永善朱施利金耀辉王文桂马志钧倪柏钢
Owner HANGZHOU IRON & STEEL GRP
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