Wear-resistant vanadium-titanium gear and preparation method thereof

A gear, vanadium-titanium technology, applied in the field of gears, can solve the problems of poor wear resistance, not as expected, low hardness, etc., to achieve high hardness and wear resistance, improved strength, high bending strength and fatigue resistance. Effect

Inactive Publication Date: 2015-12-16
何鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Large carburized gears are usually made of low-carbon alloy carburized steel. The gear blank generally needs to go through multiple cold and hot processing processes such as forging → pre-heat treatment → cutting → carburizing and quenching → finishing machining to obtain higher surface hardness and Good core toughness makes the finished gears have excellent properties such as wear resistance, fatigue resistance, and corrosion resistance. Howeve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1, a kind of preparation method of wear-resistant vanadium-titanium gear, comprises the following steps:

[0057] Step 1. Put the raw iron into the converter to heat and melt. After the raw iron is completely melted, adjust the temperature of the molten pool so that the temperature of the molten pool is controlled at about 1550°C, and then add decarburizers, desulfurizers, and deoxidizers into the molten pool. , to decarburize, desulfurize and deoxidize the molten iron in the molten pool;

[0058] Step 2. After the decarburization, desulfurization and deoxidation processes are completed, raise the temperature of the molten pool to reach about 1600°C, keep it for 5 minutes, and then continuously add high-carbon ferrochromium, ferromanganese, copper, ferromolybdenum and ferromolybdenum into the molten pool. Nickel particles, so that the chromium content, manganese content, copper content, molybdenum content and nickel content in the molten pool meet the predetermined requ...

Embodiment 2

[0074] 1, a kind of preparation method of wear-resistant vanadium-titanium gear, comprises the following steps:

[0075] Step 1. Put the raw iron into the converter to heat and melt. After the raw iron is completely melted, adjust the temperature of the molten pool so that the temperature of the molten pool is controlled at about 1550°C, and then add decarburizers, desulfurizers, and deoxidizers into the molten pool. , to decarburize, desulfurize and deoxidize the molten iron in the molten pool;

[0076] Step 2. After the decarburization, desulfurization and deoxidation processes are completed, raise the temperature of the molten pool to reach about 1600°C, keep it for 5 minutes, and then continuously add high-carbon ferrochromium, ferromanganese, copper, ferromolybdenum and ferromolybdenum into the molten pool. Nickel particles, so that the chromium content, manganese content, copper content, molybdenum content and nickel content in the molten pool meet the predetermined requ...

Embodiment 3

[0092] 1, a kind of preparation method of wear-resistant vanadium-titanium gear, comprises the following steps:

[0093] Step 1. Put the raw iron into the converter to heat and melt. After the raw iron is completely melted, adjust the temperature of the molten pool so that the temperature of the molten pool is controlled at about 1550°C, and then add decarburizers, desulfurizers, and deoxidizers into the molten pool. , to decarburize, desulfurize and deoxidize the molten iron in the molten pool;

[0094] Step 2. After the decarburization, desulfurization and deoxidation processes are completed, raise the temperature of the molten pool to reach about 1600°C, keep it for 5 minutes, and then continuously add high-carbon ferrochromium, ferromanganese, copper, ferromolybdenum and ferromolybdenum into the molten pool. Nickel particles, so that the chromium content, manganese content, copper content, molybdenum content and nickel content in the molten pool meet the predetermined requ...

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PUM

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Abstract

The invention discloses a wear-resistant vanadium-titanium gear and a preparation method thereof. The wear-resistant vanadium-titanium gear is composed of the following components in percentage by weight: 0.18-0.33% of carbon, 2.3-3.8% of chromium, 0.3-0.5% of manganese, 0.17-0.25% of silicon, 3.8-4.2% of nickel, 1.0-1.8% of tungsten, 1.10-2.15% of vanadium, 1.48-2.57% of titanium, 0.21-0.34% of copper, 1.3-2.1% of molybdenum, 0.18-0.32% of rare earth, 0.0018-0.0041% of boron, at most 0.035% of sulfur and phosphorus, and the balance of iron and inevitable impurities. The method comprises the following steps: preheating treatment, isothermal annealing treatment, primary quenching, primary tempering, carburizing treatment, high-temperature tempering, secondary quenching, secondary tempering and shot blasting. The finally obtained gear has the advantages of high mechanical properties (wear resistance, fatigue resistance, hardness and the like), favorable comprehensive properties and longer service life, and is especially suitable for the high-speed heavy-load high-impact-force occasions with the gear module of greater than 6.

Description

technical field [0001] The invention relates to a gear, in particular to a wear-resistant vanadium-titanium gear and a preparation method thereof. Background technique [0002] Large carburized gears are usually made of low-carbon alloy carburized steel. The gear blank generally needs to go through multiple cold and hot processing processes such as forging → pre-heat treatment → cutting → carburizing and quenching → finishing machining to obtain higher surface hardness and Good core toughness makes the finished gears have excellent properties such as wear resistance, fatigue resistance, and corrosion resistance. However, there are still shortcomings such as low hardness and low wear resistance, which lead to some places where the gears need to bear high loads. The service life of gears is often not as good as expected. How to improve the working life of gears has become a short board to improve the competitiveness of the gear industry. For this reason, it is valuable to achi...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C33/04C21D9/32C21D1/26C21D1/18C23C8/22
Inventor 何鹏
Owner 何鹏
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