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High-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel and production method thereof

A high-carbon alloy steel and micro-alloying technology, applied in the field of high-carbon alloy steel, can solve the problems of improper chemical composition design, unstable product quality, and narrow production process window.

Inactive Publication Date: 2018-12-14
JIANGSU LIHUAI IRON AND STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current chemical composition of wear-resistant steel balls is improperly designed, and the product quality is unstable, resulting in a narrow production process window

Method used

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  • High-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel and production method thereof
  • High-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel and production method thereof
  • High-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] C: 0.78%, Si: 0.29%, Mn: 0.93%, P: 0.012%, S: 0.008%, Ni: 0.08%, Cr: 0.86%, Al: 0.034%, Nb: 0.042%, Ti: 0.037%, [H]: 0.0001%, [O]: 0.0013%, [N]: 0.003%, and the rest Fe.

[0080] According to the mass percentage of the above components,

[0081] 1) Pre-desulfurization of molten iron: Desulphurization by spraying granular magnesium;

[0082] 2) Converter smelting: Smelting is carried out in a top-bottom double-blown converter with a capacity of more than 90 tons, using molten iron and scrap steel as raw materials for primary smelting, double slag operation to achieve pre-removal of P, and adding 350kg of special refining slag, 450kg of lime, metal Manganese, silicomanganese, high-carbon ferrochrome and other alloys are pre-deoxidized and the composition is initially adjusted, and slag is used to prevent slag from returning to steel;

[0083] 2) Refining: Deep deoxidation and alloying of steel in LF furnaces of more than 90 tons. According to the LF slag condition and t...

Embodiment 2

[0117] C: 0.82%, Si: 0.27%, Mn: 0.92%, P: 0.009%, S: 0.007%, Ni: 0.06%, Cr: 0.76%, Al: 0.035%, Nb: 0.047%, Ti: 0.042 %, [H]: 0.0001%, [O]: 0.0011%, [N]: 0.002, and the rest Fe.

[0118] According to the mass percentage of the above components,

[0119] 1) Pre-desulfurization of molten iron: Desulphurization by spraying granular magnesium;

[0120] 2) Converter smelting: Smelting is carried out in a top-bottom double-blown converter with a capacity of more than 90 tons, using molten iron and scrap steel as raw materials for primary smelting, double slag operation to achieve pre-removal of P, and adding 350kg of special refining slag, 450kg of lime, metal Manganese, silicomanganese, high-carbon ferrochrome and other alloys are pre-deoxidized and the composition is initially adjusted, and slag is used to prevent slag from returning to steel;

[0121] 2) Refining: Deep deoxidation and alloying of steel in LF furnaces of more than 90 tons. According to the LF slag condition and t...

Embodiment 3

[0155]C: 0.68%, Si: 0.35%, Mn: 0.82%, P: 0.013%, S: 0.010%, Ni: 0.06%, Cr: 0.77%, Al: 0.025%, Nb: 0.029%, Ti: 0.023%, [H]: 0.0001%, [O]: 0.001%, [N]: 0.004%, and the rest Fe.

[0156] According to the mass percentage of the above components,

[0157] 1) Pre-desulfurization of molten iron: Desulphurization by spraying granular magnesium;

[0158] 2) Converter smelting: Smelting is carried out in a top-bottom double-blown converter with a capacity of more than 90 tons, using molten iron and scrap steel as raw materials for primary smelting, double slag operation to achieve pre-removal of P, and adding 350kg of special refining slag, 450kg of lime, metal Manganese, silicomanganese, high-carbon ferrochrome and other alloys are pre-deoxidized and the composition is initially adjusted, and slag is used to prevent slag from returning to steel;

[0159] 2) Refining: Deep deoxidation and alloying of steel in LF furnaces of more than 90 tons. According to the LF slag condition and the...

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Abstract

The invention discloses high-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel. The high-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel comprises chemical components including, by mass percent, 0.65%-0.85% of C, 0.20%-0.45% of Si, 0.80%-1.00% of Mn, 0.015% or less of P, 0.015% or less of S, 0.05%-0.10% of Ni, 0.75%-0.95% of Cr, 0.010%-0.045% of Al, 0.020%-0.050% of Nb, 0.010%-0.050% of Ti, 0.0002% or less of [H], 0.002% or less of [O], 0.006% or less of [N] and the balance Fe. Through a formula, according to the high-abrasion-resistance and impact-resistance niobium and titanium microalloying high-carbon alloy steel and a production method thereof, based on original components, moderatemicroalloy elements of Nb and Ti are added to control austenite grain sizes, the elements of Nb and Ti carry out microalloying, by optimizing the chemical components of the steel, rolling productionprocess windows of steel balls are expanded, the abrasion resistance and the tenacity of the steel alloy are improved, and the breaking in advance of the steel balls is avoided.

Description

technical field [0001] The invention relates to the technical field of high-carbon alloy steel in the iron and steel industry, in particular to a strong wear-resistant and impact-resistant niobium-titanium microalloyed high-carbon alloy steel and a production method thereof. Background technique [0002] With the decrease of global rich ore reserves and the gradual increase of market demand for metals, the amount of ore to be processed is increasing year by year, which requires the scale and performance of mineral processing equipment to continue to expand [1]. One of the key processes of ore dressing is grinding[2]. The grinding process is constantly evolving towards a more optimized processing process. The obvious trend is to use a large semi-autogenous mill process to replace the traditional crushing and grinding process to simplify the process. , The investment cost of infrastructure construction is reduced, the production cost is reduced, and the production efficiency i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50C22C33/04C21C7/064C21C7/06C21C7/10
CPCC21C7/06C21C7/0645C21C7/10C22C33/04C22C38/02C22C38/04C22C38/06C22C38/48C22C38/50Y02P10/20
Inventor 吉光郑力宁肖波张洪才车从荣董友前蒋栋初
Owner JIANGSU LIHUAI IRON AND STEEL CO LTD
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