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Wet pan gear and manufacturing method thereof

A manufacturing method and technology of gears, which are applied to belts/chains/gears, mechanical equipment, components with teeth, etc., to achieve the effects of reducing raw material cost, good isoquenching process, and improving mechanical strength

Active Publication Date: 2010-12-01
HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention does not involve the problem of raw material composition, the service life needs to be improved, and the gear is not suitable for wet rolling machines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A kind of wet rolling machine gear, its raw material alloy composition is: C 3.6%, Si 2.4%, Mn 0.7%, P 0.03%, S 0.02%, Cu 0.6%, Mo 0.1%, Cr 0.5%, remainder The amount is Fe.

[0024] The manufacturing method of this wet rolling machine gear is:

[0025] (1) Molding Use resin sand to make gear molds, use zircon powder (ZrSiO 4 ) Brush the inside of the mold to ensure that the teeth of the casting do not stick to sand or deform;

[0026] (2) Smelting and casting Heat and melt the raw materials in an electric furnace, smelt at 1480-1500°C for 1.5-2 hours to obtain alloy liquid, add rare earth magnesium-silicon-iron alloy spheroidizer with an alloy weight of 1.2-1.6%, and then stir evenly to melt the alloy The liquid is injected into the above-mentioned mold, and cast into a gear blank; after natural cooling, the mold is demoulded, and the resin sand is removed; the main component of the rare earth magnesium ferrosilicon alloy nodulizer is ferrosilicon, and ...

Embodiment 2

[0029] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0030] Wet rolling machine gear raw material composition: C 3.4%, Si 2.2%, Mn 0.6%, P 0.06%, S 0.03%, Cu 0.7%, Mo 0.1%, Cr 0.5%, the balance is Fe.

[0031] Manufacturing method: melting temperature 1500°C, melting time 1.5h; heat treatment temperature 900°C, heat preservation 4h; tempering temperature 285°C, tempering time 2h; machined gear surface roughness Ra 7-10.

Embodiment 3

[0032] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0033] Wet rolling machine gear raw material composition: C 3.8%, Si 2.6%, Mn 0.9%, P 0.05%, S 0.02%, Cu 0.4%, Mo 0.2%, Cr 0.6%, the balance is Fe.

[0034] Manufacturing method: melting temperature 1480°C, melting time 2 hours; heat treatment temperature 920°C, heat preservation 2 hours; tempering temperature 290°C, tempering time 2 hours; surface roughness Ra of machined gears is 8-12.

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Abstract

The invention relates to a long-life wet pan gear and a manufacturing method thereof. The wet pan gear is chemically made from 3.4-3.8% of C, 2.2-2.6% of Si, 0.6-0.9% of Mn, not more than 0.06% of P, not more than 0.03% of S, 0.4-0.7% of Cu, 0.05-0.2% of Mo, 0.4-0.6% of Cr and the balance of Fe. The manufacturing method comprises the following steps of: making a mold, smelting, casting, smelting into an alloy liquid at 1480-1500 DEG C, adding rare earth ferrosilicon magnesium alloy nodulizer, uniformly mixing, and pouring into the mold to cast a gear blank; thermally treating the blank at 900-920 DEG C for 2-4 h, heating the tooth part of the blank to 280-310 DEG C, and tempering for 2-3 h; and processing by a lathe so that the surface roughness Ra of the gear reaches 6.3-12.5. The strength and the wear resistance of the product are increased by 2-3 times higher than those of common spheroidal graphite cast iron, the tensile strength is 780-810 MPa, the yield strength is 580-610 MPa, the hardness HRC of the tooth part reaches 40-48, and the average service life of the product is long.

Description

technical field [0001] The invention relates to the field of gear processing, in particular to a high-life wet rolling machine gear and a manufacturing method thereof. Background technique [0002] The processing technology of gears is divided into blank forming, heat treatment, turning, hobbing, shaving or grinding and other processes. With the development of the machinery industry, higher requirements are put forward for the strength, wear resistance and hardness of gears. During the processing, the gear material and processing technology have a great influence on the performance of the gear. At present, the gear material is mostly QT500 ductile iron, and the average service life of a gear is only about 15 days. The hardness and impact toughness of the gear are low, and the service life is short, which cannot meet the needs of industrial applications. [0003] The patent with the application number CN200610026704.1 provides a processing method for the external cylindrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10F16H55/17F16H55/06B23P15/14
Inventor 徐林富徐跃庆徐跃刚李宏宇粱保青徐光雷左晓东
Owner HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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