Hot-rolled steel strip, preparation method thereof and application of hot-rolled steel strip in double-metal band saw back material

A technology of steel strip and molten steel, which is applied in the composition design and production field of hot-rolled steel strip for bimetal band saw back material, can solve the problems affecting the service life of the finished saw blade, poor fatigue life, low alloy composition, etc. The effect of hardness, fatigue life improvement, and high steel purity

Pending Publication Date: 2022-04-15
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the service process, fatigue cracks usually appear first on the back material of the band saw, and in severe cases, it will break, directly affecting the service life of the finished saw blade
Howeve

Method used

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  • Hot-rolled steel strip, preparation method thereof and application of hot-rolled steel strip in double-metal band saw back material

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0045] Yet another aspect, the present invention also provides a method of preparing a hot-rolled steel strip, comprising the steps of:

[0046] (1) Iron water refines, RH refining, iron water refining, RH refining

[0047] (2) Connect the steel water to the continuous casting blank, the continuous casting biller to feed the next step after heat supply;

[0048] (3) The coarse rolling is carried out after removal of the coil, and the high pressure water is removed, and the steel strip is obtained, and the steel strip is obtained; wherein the heating temperature is 1180 ° C - 1290 ° C, The termination temperature of the coarse rolling is 1000 ° C to 1200 ° C; the end temperature of the finishing is: 780 ° C to 950 ° C;

[0049] (4) Cooling, winding, softening annealing step to obtain a hot rolled steel belt product.

[0050] The hot-rolled steel belt preparation method of the present invention is produced using a higher heating temperature + controlled rolling process, and the obta...

Example Embodiment

[0075] Example 1

[0076] The technical characteristics of the strip steel of the present invention will be described in detail below. The mass percentage of the chemical composition of the hot rolled roll plate for the double metal strip sheave material in this example is:

[0077]C: 0.33% Si: 0.28 mN: 0.80 p: 0.008 s: 0.002 Al: 0.041 CR: 3.60 MO: 2.20 Ni: 0.86 Nb: 0.045 V: 0.35 N: 0.0046 o: 9.0PPM; H: 1.2ppm; margin FE and inevitable impurity elements.

[0078] The roll plate thick of this embodiment is 4.0 mm, width 1015 mm, and 462 m long.

[0079] The yield strength of the hot rolled state is 1061 MPa, the tensile strength is 1367 MPa, the elongation is 8.5%, the hardness HRC52.0, and the thickness of the decollation is 0.00 mm. The yield strength of the softening annealing state is 660 MPa, and the tensile strength is 816 MPa, the elongation is 22.0%, the hardness HRB 97.5, and the single-sided total release layer depth is 0.02 mm. Meet the performance requirements of the ho...

Example Embodiment

[0124] Example 2-4

[0125] The heat rolled steel strip in Example 2-4 in Example 2-4 is prepared in accordance with Example 1, wherein the components of the hot-rolled steel strip are shown in Table 1, and the specific process parameters used in Example 2-4, heat The performance of the rolling strip is shown in Table 2.

[0126] Table 1 Example 2-4 ingredients (wt%) ingredients ingredient in the hot-rolled steel strip (wt%)

[0127] Example C Si Mn P S Cr Mo Ni NB V Al Example 2 0.33 0.24 0.76 0.008 0.001 3.57 2.23 0.85 0.053 0.37 0.051 Example 3 0.32 0.28 0.83 0.006 0.001 3.60 2.28 0.78 0.031 0.38 0.057 Example 4 0.34 0.22 0.74 0.007 0.002 3.54 2.31 0.83 0.038 0.40 0.047

[0128] Table 2, Table 2

[0129] Table 2 Example 2-4 The process parameters employed with the preparation of hot rolled steel strips (hot rolled state)

[0130]

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Abstract

The invention belongs to the technical field of medium-carbon high-alloy steel, and relates to a hot-rolled steel strip, a preparation method thereof and application of the hot-rolled steel strip in a double-metal band saw back material. The hot rolled steel strip provided by the invention comprises the following components in percentage by weight: 0.28%-0.40% of C, 0.10%-0.50% of Si, 0.40%-1.20% of Mn, 0.01%-0.10% of Al, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 2.80%-4.10% of Cr, 1.50%-2.60% of Mo, 0.60%-1.40% of Ni, 0.10%-0.60% of V, 0.01%-0.12% of Nb, less than or equal to 0.02% of Cu, less than or equal to 120 ppm of N, less than or equal to 18 ppm of O, less than or equal to 2.4 ppm of H and the balance of Fe and inevitable impurity elements. The hot rolled steel strip for the double-metal band saw back material has high finished product anti-fatigue performance, the idling fatigue test life of the hot rolled steel strip is larger than or equal to 70000 weeks, the fatigue life is prolonged by 30-60% compared with that of traditional saw back steel X32, and the use requirement of the high-fatigue-performance double-metal band saw back material is met.

Description

technical field [0001] The invention belongs to the technical field of medium-carbon high-alloy steel, and relates to a hot-rolled steel strip and its preparation method and its application in the back material of a bimetallic band saw, in particular to a strip with high strength, toughness, high hardness, excellent high-temperature mechanical properties and Composition design and production method of hot-rolled steel strip for bimetallic band saw backing with long fatigue life. Background technique [0002] Bimetal band saw blades are mainly used for cutting high-hardness materials such as various steels, non-ferrous metals and hard precious woods. The tooth material of the bimetal band saw blade is high-speed steel (such as M42 and M51 with high cobalt content), which has high hardness, strong cutting ability and high wear resistance. The back material of the bimetallic band saw blade is made of high-quality spring steel or alloy steel. The back material and the tooth ma...

Claims

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Application Information

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IPC IPC(8): C22C38/48C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/42C21D8/02C21D1/32C21C7/064C21C7/10C21C7/00B23D61/12B23P15/00
Inventor 秦洁付培茂王彩焕
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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