Tool steel hot-rolled steel strip and preparing method thereof

A technology of tool steel and steel strip, applied in the field of tool steel hot-rolled steel strip and its preparation, can solve the problems of low sharpness and high production cost, and achieve the effect of strong market competitiveness, low production cost and good controllability

Inactive Publication Date: 2020-08-07
NINGBO IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a hot-rolled tool steel strip and its preparation method, which overcomes the defects of low sharpness or high production cost of existing products. The hot-rolled strip has high hardenability, high resistance Abrasion resistance, and good stamping resistance, the production process has strong operability, good controllability, easy industrial production, and low production cost

Method used

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  • Tool steel hot-rolled steel strip and preparing method thereof
  • Tool steel hot-rolled steel strip and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The following percentages are all in mass percent:

[0037] (1) Primary smelting of converter:

[0038] 27.35 tons of steel scrap are added to the molten iron, the total furnace capacity is 218 tons, and the mass percentage of S in the molten iron is 0.003%. Add active lime 35Kg / ton molten steel, limestone 17Kg / ton molten steel, raw dolomite 10Kg / ton molten steel, magnesite 14.5Kg / ton molten steel. The initial smelting was carried out in the primary smelting furnace for 21 minutes. After the initial smelting, the steel was released at a temperature of 1655° C. to obtain the primary molten steel, which was 192.4 tons.

[0039](2) Preliminary alloying

[0040] Add silicon manganese alloy (FeMn68Si18, comprise 68% manganese, 18% silicon, other impurity less than 5% and balance are iron) to the primary smelting molten steel that obtains in step (1), add-on is 7.5Kg / ton primary smelting Molten steel; then add aluminum and iron (FeAl40, containing 40% aluminum, less than ...

Embodiment 2

[0048] The following percentages are all in mass percent:

[0049] (1) Primary smelting of converter:

[0050] 28.15 tons of steel scrap are added to the molten iron, the total furnace capacity is 217 tons, and the mass percentage of S in the molten iron is 0.003%. Add active lime 34Kg / ton molten steel, limestone 16Kg / ton molten steel, raw dolomite 10Kg / ton molten steel, magnesite 15Kg / ton molten steel. In the primary smelting furnace, the initial smelting was carried out for 20 minutes. After the initial smelting, the steel was released at a temperature of 1647° C. to obtain the primary molten steel, which was 191.8 tons.

[0051] (2) Preliminary alloying

[0052] Add silicon manganese alloy (FeMn68Si18, comprise 68% manganese, 18% silicon, other impurity less than 5% and balance are iron) to the primary smelting molten steel that obtains in step (1), add-on is 7.5Kg / ton primary smelting Molten steel; then add aluminum and iron (FeAl40, containing 40% aluminum, less than ...

Embodiment 3

[0060] The following percentages are all in mass percent:

[0061] (1) Primary smelting of converter:

[0062] 26.05 tons of steel scrap are added to the molten iron, the total furnace capacity is 217 tons, and the mass percentage of S in the molten iron is 0.004%. Add active lime 35Kg / ton molten steel, limestone 16Kg / ton molten steel, raw dolomite 10Kg / ton molten steel, magnesite 15Kg / ton molten steel. In the primary smelting furnace, the initial smelting was carried out for 20 minutes. After the initial smelting, the steel was released at a temperature of 1649° C. to obtain the primary molten steel, which was 193.6 tons.

[0063] (2) Preliminary alloying

[0064] Add silicon-manganese alloy (FeMn68Si18, comprising 68% manganese, 18% silicon, other impurity less than 5% and balance are iron) to the primary smelting molten steel obtained in step (1), the addition is 7.7Kg / ton primary smelting Molten steel; then add aluminum and iron (FeAl40, containing 40% aluminum, less t...

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Abstract

The invention relates to a tool steel hot-rolled steel strip and a preparing method thereof. The tool steel hot-rolled steel strip comprises following components including, by mass percent, 0.52%-0.59% of C, 0.60-0.90% of Mn, 0.15%-0.35% of Si, 0-0.015% of S, 0-0.030% of P, 0.020%-0.040% of Ti, 0.0012%-0.0035% of B, 0.010%-0.050% of Als, 0-0.20% of Cu, 0-0.5% of impurities and the balance Fe. Thetool steel hot-rolled steel strip has high hardenability, high abrasion resistance and good punching resistance, the production technology is high in operability and good in controllability, industrial production is easy, and the production cost is low.

Description

technical field [0001] The invention belongs to the field of steel strips, in particular to a hot-rolled tool steel strip and a preparation method thereof. Background technique [0002] Tool steel is a type of steel that is widely used in production and daily life. It is widely used in machining, garden tools, knives, etc. Tool steel requires high sharpness and wear resistance after heat treatment, and considering the use of The safety of the process also requires the steel to have a certain strength and toughness. According to the requirements of the use characteristics, medium and high carbon steels are generally used to make tool steels. There are many types of tool steel. According to the change of carbon content and alloy composition, a variety of tool steels for specific purposes can be designed to meet the requirements of different use environments and performance. [0003] The steel types produced by the prior art include: 55, S55C, 45MnB, 50B and other grades, wher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16C22C33/06C21C5/28C21C7/00
CPCC21C5/28C21C7/0006C21C7/0025C21C7/0056C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16Y02P10/20
Inventor 朱施利胡文豪张本亮曹黎猛王德斌陈红雨杨志强吴红翔
Owner NINGBO IRON & STEEL
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