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Preparation method for automobile plate spring

A technology of automobile plates and leaf springs, applied in the direction of manufacturing tools, heat treatment equipment, coatings, etc., can solve the problems of serious environmental pollution, high weight, and non-wear resistance

Active Publication Date: 2020-10-23
四川丰元机械制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2) The automobile leaf spring is a multi-layer plate composite structure with high weight and increased energy consumption during loading and operation
At present, the automobile leaf spring is mainly anti-corrosion coating (or paint). The thickness of the coating is more than several hundred microns, which is relatively thick, but it is not wear-resistant and easy to age and fall off.
At the same time, there are polluting gases, dust and other emissions during the paint coating process, which seriously pollutes the environment.

Method used

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  • Preparation method for automobile plate spring
  • Preparation method for automobile plate spring

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preparation example Construction

[0031] The invention provides a technical solution: a method for preparing an automobile leaf spring. The automobile leaf spring is made of a spring steel billet containing molybdenum, vanadium, chromium and nickel elements, comprising the following steps:

[0032] Step S1, spring steel is forged to obtain a billet; melted in a vacuum electric furnace, then electroslag remelted under the protection of an inert gas, and then hot forged into a billet (initial forging temperature 1200°C, final forging temperature 1050°C);

[0033] Step S2, hot-rolling the spring steel billet into an automobile leaf spring steel plate with variable cross-section characteristics, and the hot-rolling temperature is 1200°C;

[0034] Step S3, performing ear rolling; keeping the leaf spring in a furnace at 1050° C. for 5-10 minutes, and then performing ear rolling;

[0035] Step S4, constant temperature treatment; the leaf spring after the ears are directly put into a heat treatment furnace at 860°C fo...

Embodiment 1

[0048] A method for preparing an automobile leaf spring. The automobile leaf spring is made of a spring steel billet containing molybdenum, vanadium, chromium, and nickel elements. The mass percentages of the spring steel billet components are: carbon C: 0.48%; silicon Si: 1.4% Manganese Mn: 0.80%; Molybdenum Mo: 0.15%; Vanadium V: 0.10%; Chromium Cr: 0.2%; Nickel Ni: 0.1%; Copper Cu: 0.08%; Aluminum Al: <0.09%; Phosphorus P: 0.009%; the balance is iron Fe. Weigh the cumulative sum of the above elements to be 100%, smelt in a vacuum electric furnace, and then go through electroslag remelting under the protection of inert gas, and then hot forge into billets (initial forging temperature 1200°C, final forging temperature 1050°C), take the forged and formed Spring steel blanks for automobile leaf springs are placed in a medium-frequency induction furnace and heated evenly to 1200°C, and then bent and molded on a die forging machine to obtain the radian and variable section size r...

Embodiment 2

[0052] A method for preparing an automobile leaf spring. The automobile leaf spring is made of a spring steel billet containing molybdenum, vanadium, chromium and nickel elements. The mass percentages of the spring steel billet components are: carbon C: 0.49%; silicon Si: 1.48% ; Manganese Mn: 0.85%; Molybdenum Mo: 0.16%; Vanadium V: 0.12%; Chromium Cr: 0.23%; Nickel Ni: 0.12%; Copper Cu: 0.09%; P: 0.008%; the balance is iron Fe. Weigh the cumulative sum of the above elements to be 100%, smelt in a vacuum electric furnace, and then go through electroslag remelting under the protection of inert gas, and then hot forge into billets (initial forging temperature 1200°C, final forging temperature 1050°C), take the forged and formed Spring steel blanks for automobile leaf springs are placed in a medium-frequency induction furnace and heated evenly to 1200°C, and then bent and molded on a die forging machine to obtain the radian and variable section size required for automobile leaf ...

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Abstract

The invention discloses a preparation method for an automobile plate spring. The preparation method is characterized in that the automobile plate spring is manufactured by adopting a spring steel blank containing molybdenum, vanadium and trace chromium and nickel elements, and the preparation method comprises the following steps that spring steel is forged to obtain a blank, the blank is hot-rolled into an automobile plate spring steel plate with variable cross-section characteristics, eye coiling is carried out, constant-temperature treatment is carried out, water-cooling quenching is carriedout, air cooling is carried out, surface accurate grinding is carried out, shot blasting treatment is carried out, gas co-permeation is carried out, overlay coating is carried out, and a finished product is obtained after drying. According to the preparation method, after a hot rolling process, waste heat is repeatedly utilized by means of a constant temperature device to complete forming and heat treatment of the plate spring, the heating time is shortened, the energy loss is greatly reduced, in the heat treatment process, water is adopted as a cooling medium, the problem of environmental pollution is reduced, tempering and surface gas co-permeation treatment are simultaneously carried out, the cost is greatly reduced, the surface quality of the plate spring is improved, and the corrosion resistance and the fatigue performance are improved.

Description

technical field [0001] The invention relates to the technical field of automobile preparation, in particular to a method for preparing an automobile leaf spring. Background technique [0002] Automobile leaf spring is the most traditional elastic element in automobile suspension system. It has the advantages of good reliability, simple structure, short manufacturing process, low cost and greatly simplified structure. Mainly made of spring steel. The shortcoming of prior art manufacturing automobile leaf spring is as follows: [0003] 1) High energy consumption and serious environmental pollution in the production process. It is mainly reflected in the fact that the variable cross section needs to be heated once, the coil ear needs to be reheated once, and the quenching needs to be reheated to a high temperature again. Repeated heating for several times, the energy loss is large; in addition, the domestic leaf spring quenching medium is oil quenching, when tempering It nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/02C21D1/18C23C8/28C23C30/00B23P15/00
CPCC21D9/02C21D1/18C23C8/28C23C30/00B23P15/00
Inventor 崔国栋余佑祥崔建强张程菘陈大志
Owner 四川丰元机械制造有限公司
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