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Steel wire rod for hardware tool and production method thereof

A technology for hardware tools and production methods, applied in the direction of improving process efficiency, can solve the problems of short service life, wear, and difficulty in bearing high loads.

Active Publication Date: 2017-09-01
ZENITH STEEL GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problems that the edges and corners of the existing hardware tools made of wire rods are easy to be broken and deformed, difficult to withstand high loads, and have a short service life and serious wear, making it difficult to meet the needs of high-end hardware work. The selection of route and key process parameters provides a steel wire rod for hardware tools and its production method, which ensures that the steel wire rod has high purity, stable chemical composition, dense and uniform structure, no obvious decarburization layer, and a large proportion of bainite structure , Good threadability, fully meet the technical requirements of steel wire rod technology for high-end hardware tools, the final tool has good wear resistance, high hardness, high toughness, can withstand high torque, long service life, avoid In the process of use, the edges and corners are broken, deformed, etc.

Method used

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  • Steel wire rod for hardware tool and production method thereof
  • Steel wire rod for hardware tool and production method thereof
  • Steel wire rod for hardware tool and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Converter smelting

[0059] Converter is used for high lance smelting, low-phosphorus tapping technology, bottom-blown argon stirring throughout the process, and the steelmaking raw materials used are scrap steel, pig iron and molten iron. Among them, the phosphorus content of molten iron is less than 0.09%, and scrap steel accounts for 9% of the total weight of steelmaking raw materials , pig iron accounts for 4% of the total weight of steelmaking raw materials, the total charge is 138t / furnace, converter smelting takes 14min, tapping [C]0.25%, tapping [P]0.008%, tapping temperature 1653°C, tapping 1 / At 4 o'clock, add aluminum cake 0.60kg / t (relative to the amount of steelmaking raw materials, the same below), silicon manganese 7.2kg / t, ferrosilicon 14.7kg / t, high carbon ferrochromium 3.6kg / t, Nickel plate 1.52kg / t, ferro-vanadium 4.2kg / t, ferro-molybdenum 6.5kg / t, lime 600kg / furnace, synthetic slag 400kg / furnace, the tapping process adopts double slag blocking op...

Embodiment 2

[0076] In step (1), steel scrap accounts for 8.5% of the total weight of steelmaking raw materials, pig iron accounts for 4.5% of the total weight of steelmaking raw materials, and the total charge is 139t / furnace;

[0077] In step (2), it is changed to a continuous pouring furnace, and the temperature of the LF hanging bag is 1575°C;

[0078] In step (3), the temperature of the hanging bag after soft blowing is 1525°C;

[0079] In step (4), the degree of superheat of continuous casting is 23°C, and the casting speed is 0.85m / min;

[0080] All the other operations are the same as in Example 1.

Embodiment 3

[0082] In step (7), the furnace temperature in the second stage of the heating furnace in the wire rod rolling process is 992°C, the furnace temperature in the soaking section is 997°C, the rolling start temperature is 917°C, the finishing rolling temperature is 832°C, and the spinning temperature is 796°C. Example 2 is the same.

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Abstract

The invention belongs to the field of steel and iron material manufacturing and particularly relates to a steel wire rod for a hardware tool and a production method thereof. The steel wire rod comprises the chemical components, by weight, of 0.66%-0.72% of C, 0.85%-1.10% of Si, 0.40%-0.55% of Mn, 0.15%-0.30% of Cr, 0.10%-0.20% of Ni, 0.38%-0.45% of Mo, 0.15%-0.25% of V, 0.020-0.050% of Nb, 0.020% of P or the less, 0.015% of S or the less and the balance Al, Fe and inevitable impurities. The production method comprises the working procedures of converter smelting, LF refining, RH vacuum degassing, square billet continuous casting, rolling cogging, billet rolling scaling and plate stripe rolling.

Description

technical field [0001] The invention belongs to the field of steel material production, and in particular relates to a steel wire rod for hardware tools and a production method thereof. Background technique [0002] Tool steel refers to a class of steel used to manufacture cutting tools, measuring tools, molds and wear-resistant tools. It has high hardness and can maintain high hardness and red hardness at high temperatures, as well as high wear resistance and appropriate Toughness, generally divided into carbon tool steel, alloy tool steel and high-speed tool steel. Steel for hardware tools is based on carbon tool steel by adding chromium, molybdenum, vanadium, niobium and other alloying elements to improve its hardenability, toughness, wear resistance and heat resistance. It is mainly used to manufacture high-hardness inner hexagonal wrenches. Screwdrivers, batch Tsui and other hand tools. [0003] Due to the special working environment of hardware tools, it is required ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/06C22C33/06C21C7/10C21C7/00C21D8/06
CPCC21C7/0006C21C7/0056C21C7/10C21D8/065C21D2211/002C22C33/006C22C33/06C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/48Y02P10/20
Inventor 豆乃远滕力宏万文华
Owner ZENITH STEEL GROUP CORP
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