Hot processing technology for automobile hub

A technology for automotive wheels and thermal processing, applied in heat treatment furnaces, manufacturing tools, heat treatment equipment, etc., can solve the problems of low toughness and large internal stress of aluminum alloy wheels, achieve uniform internal and external temperatures, improve toughness, and reduce deformation.

Inactive Publication Date: 2016-09-14
SANMEN VOCATIONAL SECONDARY SPECIALIZED SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, aluminum alloy wheels have low toughness and large internal stress. In order to improve the mechanical properties of aluminum alloy automobile wheels, heat treatment is required to reduce internal stress and improve strength and toughness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the present invention, the automobile wheel hub thermal processing process comprises the following steps:

[0018] Step 1. Send the formed hub into a solid solution furnace for heating, heat the hub to 480°C within 35 minutes, and keep it for 90 minutes;

[0019] Step 2. Dip the wheel hub after solution treatment in step 1 into a cooling medium at 70°C for 220 seconds and quench for 220 seconds. The cooling medium includes 16 parts of sodium chloride, 5 parts of sodium metaphosphate, 6 parts of sodium petroleum sulfonate, and 8 parts of barium chloride. parts, 145 parts of water;

[0020] Step 3: Carry out the first-stage aging treatment and the second-stage aging treatment on the quenched hub in turn, wherein the first-stage aging temperature is 120°C, the first-stage aging time is 90 minutes, the second-stage aging temperature is 185°C, and the second-stage The aging time is 120 minutes;

[0021] Step 4. Take out the wheel hub after the aging treatment in step 4 ...

Embodiment 2

[0023] In the present invention, the automobile wheel hub thermal processing process comprises the following steps:

[0024] Step 1. Send the formed hub into a solid solution furnace for heating, heat the hub to 535°C within 45 minutes, and keep it for 110 minutes;

[0025] Step 2, immerse the wheel hub after the solution treatment in step 1 in a cooling medium at 65°C for 200 seconds and quench for 200 seconds. The cooling medium includes 15 parts of sodium chloride, 5 parts of sodium metaphosphate, 6 parts of sodium petroleum sulfonate, chlorinated 8 parts of barium, 5 parts of tetrasodium 2-phosphonic acid butane-1,2,4-tricarboxylate, 10 parts of zinc chloride, and 150 parts of water; then the surface of the hub is coated with a fireproof material, which includes 125 Parts of quartz sand, 4 parts of epoxy resin, 5 parts of zirconia, 6 parts of sodium lignosulfonate, and 5 parts of barium sulfate.

[0026] Step 3: Carry out the first-stage aging treatment and the second-sta...

Embodiment 3

[0029] In the present invention, the automobile wheel hub thermal processing process comprises the following steps:

[0030] Step 1. Send the formed hub into a solid solution furnace for heating, heat the hub to 520°C within 45 minutes, and keep it for 95 minutes;

[0031] Step 2, immerse the wheel hub after the solution treatment in step 1 in a cooling medium at 65°C for 180 seconds and quench for 180 seconds. The cooling medium includes 16 parts of sodium chloride, 5 parts of sodium metaphosphate, 6 parts of sodium petroleum sulfonate, chlorinated 8 parts of barium, 4 parts of tetrasodium 2-phosphonic acid butane-1,2,4-tricarboxylate, 12 parts of zinc chloride, and 150 parts of water; then the surface of the hub is coated with a fireproof material, which includes 130 Parts of quartz sand, 6 parts of epoxy resin, 4 parts of zirconia, 8 parts of sodium lignosulfonate, 5 parts of barium sulfate, 45 parts of magnesium oxide, 40 parts of calcium oxide;

[0032] Step 3: Carry out...

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PUM

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Abstract

The invention relates to a hot processing technology for an automobile hub. The hot processing technology comprises the following steps that firstly, the formed hub is fed into a solid solution furnace to be heated to 450-550 DEG C in 35-45 minutes, and the temperature is kept for 90-135 minutes; secondly, the hub obtained through solution treatment in the first step is immersed into a 65-75 DEG C cooling medium to be quenched for 180-240 seconds; thirdly, the quenched hub is subjected to first-stage aging treatment and second-stage aging treatment sequentially, the temperature of first-stage aging treatment is 120-125 DEG C, the time of first-stage aging treatment is 75-90 minutes, the temperature of second-stage aging treatment is 175-185 DEG C, and the time of second-stage aging treatment is 120-135 minutes; and fourthly, the hub obtained through aging treatment in the third step is taken out to be subjected to natural cooling. According to the hot processing technology, inner stress of the hub can be reduced effectively, and the hardness, toughness, tensile strength, compressive strength and other properties are improved.

Description

technical field [0001] The invention relates to the technical field of automobile hubs, in particular to a thermal processing technology for automobile hubs. Background technique [0002] Automobile hubs are metal parts used to support automobile tires. They are an important part of auto parts. Automobile hubs can be divided into steel hubs and aluminum alloy hubs according to their materials. Due to the large mass of steel hubs, large inertial resistance and heat dissipation Poor performance, easy to rust, single appearance; and aluminum alloy wheels have low density, high thermal conductivity, stylish and beautiful; therefore, aluminum alloy wheels have replaced steel wheels as the main automobile wheels. However, aluminum alloy wheels have low toughness and large internal stress. In order to improve the mechanical properties of aluminum alloy automobile wheels, heat treatment is required to reduce internal stress and improve strength and toughness. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/34C21D1/18C21D1/60C09D1/00C09D5/18
CPCC21D9/34C09D1/00C09D5/18C21D1/18C21D1/60
Inventor 郑晓
Owner SANMEN VOCATIONAL SECONDARY SPECIALIZED SCHOOL
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