Nitrogen-containing high-carbon steel for grinding balls and low-cost smelting process thereof

A low-cost, high-carbon technology, applied in the field of metallurgy, can solve the problems of unstudied wear-resistant steel ball quenching process, such as uniform surface hardness, reduced wear resistance of grinding balls, and reduced service life, so as to achieve fine grain size and fine grain size. Particles, long service life effect

Active Publication Date: 2021-03-26
ZENITH STEEL GROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the C content can only be selected in the range of 0.95.1.05%, and the Cr can only be selected in the range of 0.45.0.65%. If you want to improve the technical indicators such as wear resistance and hardness of the material by further increasing the carbon and chromium content, it will lead to Serious slab segregation, at the same time, when the carbon content is hig

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The electric furnace adds steelmaking raw material scrap steel and molten iron to carry out high-drawing carbon smelting operation, and scrap steel accounts for 16% of described steelmaking raw material gross weight, and molten iron accounts for 84% of described steelmaking raw material gross weight, and total charging capacity is 109t / Furnace, electric furnace smelting time is 41min, tapping temperature is 1637°C, tapping [C]: 0.45%, tapping [P]≤0.017%, 1 / 3 of tapping is followed by adding aluminum block 100kg / furnace along with steel flow, Silicon-manganese 17.0kg / t, ferrosilicon 1.0kg / t, high-carbon ferrochromium 12.7kg / t, low-nitrogen carburizer and slag lime 400kg / furnace, furnace protection agent 500kg / furnace, electric furnace adopts steel slag operation, strictly prohibited Slag removal, tapping time is 3.9min;

[0047] (2) LF uses 1.8kg / t of silicon carbide and 0.4kg / t of aluminum particles to deoxidize the steel slag interface. According to the slag condi...

Embodiment 2

[0051] Tapping [C]: 0.51%, tapping temperature 1621°C, other operations are the same as in Example 1.

Embodiment 3

[0053] Steel [C]: 0.38%, tapping temperature 1625°C, tapping aluminum block 110kg, refining slag basicity R=7.1, Al 2 o 3 Content is 32%, all the other operations are identical with embodiment 2.

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Abstract

The invention belongs to the technical field of iron and steel smelting, and particularly relates to nitrogen-containing high-carbon steel for grinding balls and a low-cost smelting process thereof. The steel comprises the components in percentage by weight: 1.00-1.10% of C, 0.30-0.55% of Si, 1.05-1.15% of Mn, less than or equal to 0.025% of P, less than or equal to 0.035% of S, 0.65-0.75% of Cr,0.015-0.030% of Al, 0.010-0.025% of Ti, 60-100ppm of N and the balance Fe and inevitable impurities. According to the nitrogen-containing high-carbon steel for the grinding balls and the low-cost smelting process thereof, by properly increasing the carbon content, adding a certain amount of Al, Ti, N and other elements for microalloying and designing process parameters, the purposes of grain refinement and solid solution strengthening are achieved, the smelted grinding ball steel is uniform in chemical component, high in purity and fine in grain, the technical indexes such as abrasion resistance, hardness and toughness of the steel are effectively improved, and the use requirements of users for high-end grinding ball steel are completely met.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a nitrogen-containing high-carbon grinding ball steel and a low-cost smelting process thereof. Background technique [0002] Steel for grinding ball is the raw material for making steel ball for grinding ball. Steel ball for grinding ball is the most commonly used grinding body in ball mill. It is widely used in mining, electric power, ceramics, metallurgical machinery, cement building materials, chemical energy and other fields. It is the most consumed material among all kinds of wearable parts. Since the working state of the ball mill is that the ball will move in a circular curve with the inner wall of the cylinder as the ball mill rotates, sliding and rolling will occur here to grind the material. After being lifted to a certain height, the grinding ball breaks away from the rotating cylinder and falls to the bottom in a parabola, the balls collide with the bal...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/28C22C33/06C21C5/52C21C7/06C21C7/00C21C7/10B22D11/111B22D11/115
CPCC22C38/02C22C38/04C22C38/06C22C38/28C22C33/06C21C5/52C21C7/06C21C7/0087C21C7/10C21C7/0056B22D11/111B22D11/115Y02P10/20
Inventor 豆乃远朱富强任振海陈占领李亚刘泽杨刘威李俊杰徐必靖
Owner ZENITH STEEL GROUP CORP
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