Method for producing 75Cr1 hot-rolled sheet steel

A technology of hot-rolled steel sheet and production method, applied in metal rolling, temperature control and other directions, can solve the specific solution method that does not mention 75Cr1 preparation technology and method, does not mention key technical problems, does not mention alloy tool steel technical and method issues, to achieve the effect of high pulling speed, moderate viscosity bulk density and high carbon content

Inactive Publication Date: 2010-06-23
GUANGZHOU PEARL RIVER STEEL & IRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to not mentioning the specific technology and method of alloy tool steel, the above patents also did not mention the specific solutions to the key technical problems existing in the production process of alloy tool steel, especially the preparation technology and method of 75Cr1

Method used

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  • Method for producing 75Cr1 hot-rolled sheet steel
  • Method for producing 75Cr1 hot-rolled sheet steel
  • Method for producing 75Cr1 hot-rolled sheet steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method for producing 75Cr1 hot-rolled steel plates based on the thin slab continuous casting and rolling process described in this embodiment, the process flow: 150t ultra-high power electric furnace smelting, 150t ladle furnace refining, thin slab continuous casting, soaking, high pressure water descaling, hot Continuous rolling, laminar cooling, coiling.

[0031] The chemical composition weight percentage ratio (wt%) of the molten steel after the alloying treatment in the refining process is: C0.70, Si0.20, Mn0.60, P0.010, S0.004, Cr0.30, V0.02, The rest is Fe and unavoidable impurities.

[0032] Process parameters: billet entering furnace temperature T 入 is 908°C, the superheat of molten steel T 过 31°C, finishing temperature T 终 855°C, coiling temperature T 卷 560℃, continuous casting casting speed S 拉 3.6m / min, continuous casting liquid core depression 3mm, slab thickness 67mm.

[0033] The physical and chemical performance indicators of mold flux: the melt...

Embodiment 2

[0038] The method for producing 75Cr1 hot-rolled steel plates based on the thin slab continuous casting and rolling process described in this embodiment, the process flow: 150t ultra-high power electric furnace smelting, 150t ladle furnace refining, thin slab continuous casting, soaking, high pressure water descaling, hot Continuous rolling, laminar cooling, coiling.

[0039] The chemical composition weight percentage ratio (wt%) of the molten steel after the alloying treatment in the refining process is: C0.80, Si0.45, Mn0.90, P0.023, S0.023, Cr0.60, V0.08, The rest is Fe and unavoidable impurities.

[0040] Process parameters: billet entering furnace temperature T 入 is 980°C, the superheat of molten steel T 过 44°C, finishing temperature T 终 945°C, coiling temperature T 卷 630℃, continuous casting casting speed S 拉 It is 5.4m / min, the continuous casting liquid core is pressed down by 18mm, and the casting slab thickness is 52mm.

[0041] The physical and chemical perform...

Embodiment 3

[0046] This embodiment is based on the method of thin slab continuous casting and rolling process to produce 75Cr1 hot-rolled steel plate. Process flow: 150t ultra-high power electric furnace smelting, 150t ladle furnace refining, thin slab continuous casting, soaking, high-pressure water descaling, hot continuous rolling , laminar cooling, coiling.

[0047] The chemical composition weight percentage ratio (wt%) of the molten steel after the alloying treatment in the refining process is: C0.75, Si0.40, Mn0.80, P0.010, S0.009, Cr0.40, V0.04, The rest is Fe and unavoidable impurities.

[0048] Process parameters: billet entering furnace temperature T 入 is 950°C, the superheat of molten steel T 过 39°C, finishing temperature T 终 880°C, coiling temperature T 卷 623°C, casting speed S 拉 4.3m / min, continuous casting liquid core reduction 6mm, slab thickness 64mm.

[0049] The physical and chemical performance indicators of mold flux: the melting point is 993°C, the basicity is 0...

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Abstract

The invention provides a method for producing high-quality 75Cr1 hot-rolled sheet steel based on the continuous thin slab casting and rolling process, which mainly adopts the following process flow: smelting, refining, continuous thin slab casting, soaking, hot continuous rolling, cooling and coiling. The superheat T of molten steel is larger than 30 DEG C and less than or equal to 45 DEG C, the charging temperature T of the cast slab is larger than or equal to 900 DEG C and less than or equal to 1050 DEG C, the finish rolling temperature T is larger than or equal to 850 DEG C and less than or equal to 950 DEG C, the coiling temperature T is larger than or equal to 550 DEG C and less than or equal to 630 DEG C, and the drawing speed S of continuous casting is larger than or equal to 3.5m/min and less than or equal to 5.5m/min; mold flux casting is adopted; and the chemical composition of molten steel is as follows: 0.70 percent to 0.80 percent by weight of C, 0.20 percent to 0.45 percent by weight of Si, 0.60 percent to 0.90 percent by weight of Mn, 0.025 percent by weight or less of P, 0.025 percent by weight or less of S, 0.30 percent to 0.60 percent by weight of Cr and 0.02 percent to 0.08 percent by weight of V. When the method is adopted to produce the 75Cr1 hot-rolled sheet steel, the segregation, porosity and cracks of the cast slab are reduced, and the 75Cr1 hot-rolled sheet steel is characterized by uniform microstructure and properties and high fatigue resistance.

Description

technical field [0001] The invention belongs to the technical field of alloy tool steel production, and is particularly suitable for a method for producing 75Cr1 hot-rolled steel plates by adopting thin slab continuous casting and rolling processes. technical background [0002] Alloy tool steel 75Cr1 has high hardness, toughness, and wear resistance. It is mainly used in the manufacture of high-end high-grade alloy tools, including high-precision circular saw blades, special tools / cutters, and special springs. [0003] Due to the characteristics of the above-mentioned application fields, the material must have certain properties, not only a certain strength, but also not too soft, which is comprehensively reflected in the need for sufficient hardness; another important feature of the substrate is that it is subject to strong vibration during use. . From the perspective of the use requirements of the matrix and the actual situation, the technical parameter requirements of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46C22C38/24B22D11/16B22D11/111B21B37/74
Inventor 陈景浒毛新平高吉祥
Owner GUANGZHOU PEARL RIVER STEEL & IRON
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