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Manufacturing process of high-wear-resistance gear

A technology with high wear resistance and manufacturing process, applied in the direction of manufacturing tools, wheels, furnace types, etc., it can solve the problems of low uniformity of the internal structure of the metal, insufficient filling, and excessive forming force, and achieve full filling of the metal. Internal structure uniformity, internal deformation uniformity, the effect of improving bending fatigue strength and contact fatigue strength

Inactive Publication Date: 2019-04-09
ZHONGNENG TIANJIN INTELLIGENT TRANSMISSION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the large contact area between the blank and the mold and fast cooling of the gear manufactured by the existing technology, the friction force on the blank when filling the mold cavity is too large, resulting in excessive forming force during forging, uneven internal deformation, Insufficient filling and low uniformity of the internal structure of the metal, thereby reducing the bending fatigue strength and contact fatigue strength of the gear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A manufacturing process for highly wear-resistant gears, the parts by weight of each component in the formula are as follows:

[0062] 95 parts of iron,

[0063] Carbon 0.38 parts,

[0064] 0.05 parts of titanium,

[0065] 0.04 parts of cerium,

[0066] Lanthanum 0.04 parts,

[0067] Chromium 0.80 parts,

[0068] Silicon 0.15 parts,

[0069] Manganese 1.8 parts;

[0070] The specific manufacturing steps are as follows:

[0071] Step 1, blanking:

[0072] Heating the steel ingot with the above components to 950°C, and successively go through the processes of jaw pressing, chamfering, and spouting;

[0073] Step 2, repeated forging:

[0074] Put the billet prepared in step 1 into the forging press for forging, adopt the forging method of extreme widening, that is, make the deformation direction limit deformation in one direction during forging; heat the forged billet to 950 °C again, and forge again, Repeat this several times;

[0075] Step three, tempering:

...

Embodiment 2

[0088] A manufacturing process for highly wear-resistant gears, the parts by weight of each component in the formula are as follows:

[0089] Iron 100 parts,

[0090] Carbon 0.43 parts,

[0091] 0.07 parts of titanium,

[0092] 0.06 parts of cerium,

[0093] Lanthanum 0.06 parts,

[0094] Chromium 1.10 parts,

[0095] Silicon 0.35 parts,

[0096] Manganese 2.3 parts;

[0097] The specific manufacturing steps are as follows:

[0098] Step 1, blanking:

[0099] Heat the steel ingot with the above components to 1200°C, and then make the billet through the processes of jaw pressing, chamfering and spouting in sequence;

[0100] Step 2, repeated forging:

[0101] Put the billet prepared in step 1 into the forging press for forging, adopt the extreme widening forging method, that is, make the deformation direction limit deformation in one direction during forging; heat the forged billet to 1200 °C again, and forge again, Repeat this several times;

[0102] Step three, tem...

Embodiment 3

[0115] A manufacturing process for highly wear-resistant gears, the parts by weight of each component in the formula are as follows:

[0116] 96 parts of iron,

[0117] Carbon 0.39 parts,

[0118] 0.06 parts of titanium,

[0119] 0.05 parts of cerium,

[0120] Lanthanum 0.05 parts,

[0121] Chromium 0.90 parts,

[0122] Silicon 0.25 parts,

[0123] Manganese 1.9 parts;

[0124] The specific manufacturing steps are as follows:

[0125] Step 1, blanking:

[0126] Heat the steel ingot with the above components to 1100°C, and sequentially go through the processes of jaw pressing, chamfering, and spouting;

[0127] Step 2, repeated forging:

[0128] Put the billet prepared in step 1 into the forging press for forging, adopt the forging method of extreme widening, that is, make the deformation direction limit deformation in one direction during forging; heat the forged billet to 1100 °C again, and forge again, Repeat this several times;

[0129] Step three, tempering:

...

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Abstract

The invention provides a manufacturing process of a high-wear-resistance gear. The manufacturing process comprises the following components of, in parts by weight, iron, carbon, titanium, cerium, lanthanum, chromium, silicon and manganese. The manufacturing process comprises the following specific steps of blanking, heating a steel ingot with the components to prepare a blank; carrying out repeated forging and pressing, carrying out forging and pressing by adopting an extreme broadening forging mode, heating again, forging again, and repeating for several times; tempering, carrying out isothermal tempering and heat preservation for 3-5 hours and then furnace cooling to the room temperature; molding, carrying out heating, in-mold molding, trimming, finally finishing and correcting; carryingout heat treatment, carrying out heat preservation for 1-1.5 hours after heating, carrying out air cooling to 500 DEG C, and then heating, and carrying out air cooling to room temperature; detecting,carrying out hardness detection on the workpiece subjected to heat treatment in the step 5. According to the manufacturing process, through forming procedures of repeated extreme broadening forging and isothermal tempering, the internal deformation of the manufactured gear is uniform, full in mold filling, and high in metal internal structure uniformity, and the bending fatigue strength and the contact fatigue strength of the gear are improved.

Description

technical field [0001] The invention relates to the technical field of gear manufacturing technology, in particular to a manufacturing technology of high wear resistance gear. Background technique [0002] Due to the large contact area between the blank and the mold and fast cooling of the gear manufactured by the existing technology, the friction force on the blank when filling the mold cavity is too large, resulting in excessive forming force during forging, uneven internal deformation, Insufficient filling and low uniformity of the internal structure of the metal reduce the bending fatigue strength and contact fatigue strength of the gear. Contents of the invention [0003] The invention aims to solve the deficiencies of the prior art, and provides a manufacturing process of high wear resistance gears. [0004] In order to achieve the above object, the present invention adopts the following technical solutions: [0005] A manufacturing process for highly wear-resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/28C22C38/02C21D1/18C21D9/32B21K1/30
CPCC22C38/38B21K1/30C21D1/18C21D9/32C22C38/005C22C38/02C22C38/28
Inventor 黄怀斌
Owner ZHONGNENG TIANJIN INTELLIGENT TRANSMISSION EQUIP CO LTD
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