Automobile spring material with good brittleness resistance and good rupture resistance

A technology of brittle fracture and spring materials, which is applied in the field of auto parts, can solve the problems of dispersion and density value that cannot be solved at the same time, restrict the large-scale development of the steel industry, and the quality stability is not high, so as to achieve high strength and prevent Oxidation, meet the effect of impact resistance

Inactive Publication Date: 2016-08-31
ANHUI HEKUANG MACHINERY
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Problems solved by technology

Although he provided a kind of niobium carbide composite powder with a density value close to molten steel and a kind of niobium carbide composite powder with good dispersion in molten steel, the problems of dispersibility and density value in the steelmaking process cannot be solved at the same time, which limits the steel industry. Large-scale development, and aluminum powder is prone to oxidation, and the quality stability is not high when preparing aluminum-doped niobium carbide

Method used

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Experimental program
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Embodiment Construction

[0013] A spring material for automobiles with good brittle fracture resistance is prepared according to the following steps:

[0014] a. Melting: Add low-sulfur phosphorus clean scrap steel into high-frequency induction melting furnace to melt into molten steel, then add recarburizer, wait for the temperature in the furnace to rise to 1500°C, add nickel, ferrosilicon and ferromanganese, and add after holding for 20 minutes After chromium, neodymium and cobalt are completely melted, add modified niobium carbide, raise the temperature to 1630°C, keep stirring at constant temperature for 5 minutes to obtain matrix alloy liquid;

[0015] b. Detection: Detect the component content of the matrix alloy liquid, add materials to make the elements by weight percentage: carbon: 0.3%, silicon: 0.2%, manganese: 1.8%, nickel: 1.2%, cobalt: 0.02%, aluminum : 0.002%, chromium 0.2%, neodymium: 0.01%, sulfur ≤ 0.015%, phosphorus ≤ 0.015%, the balance is iron and unavoidable impurities;

[0016...

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Abstract

The invention discloses an automobile spring material with good brittleness resistance and good rupture resistance. The automobile spring material consists of the following elements in percentage by weight: 0.3% to 0.8% of carbon, 0.2% to 0.3% of silicon, 1.8% to 2.0% of manganese, 1.2% to 1.8% of nickel, 0.02% to 0.04% of cobalt, 0.002% to 0.03% of aluminum, 0.2% to 0.24% of chromium, 0.01% to 0.03% of neodymium, smaller than or equal to 0.015% of sulfur, smaller than or equal to 0.015% of phosphorus and the balance of iron and inevitable impurities. The automobile spring material disclosed by the invention is capable of totally satisfying the automobile performance requirements on impact resistance, brittleness resistance and rupture resistance and is also capable of realizing batch production and lowering the cost.

Description

technical field [0001] The invention relates to the technical field of automobile parts, in particular to a spring material for automobiles with good resistance to brittle fracture. Background technique [0002] Iron and steel materials occupy an important position in the mechanical engineering manufacturing industry due to their high strength and good toughness. In recent years, mechanical engineering structures have increasingly developed in the direction of giantization and high parameters, and higher and higher requirements have been put forward for the performance of steel materials. , the addition of particles to strengthen steel materials has many advantages, but it is often at the expense of reducing plasticity and toughness on the premise of increasing strength and hardness. In the article "Preparation Technology and Application of Nano-NbC / Fe(Fe3C) Composite Powder for Iron-Based Materials Strengthened by Adding Particles", Qin Sen chose NbC as the strengthening ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/10C22C38/06C22C38/18C22C33/06C21C7/06C21C7/064
CPCC21C7/06C21C7/0645C22C33/06C22C38/005C22C38/02C22C38/04C22C38/06C22C38/105C22C38/18Y02P10/20
Inventor 胡乾桂
Owner ANHUI HEKUANG MACHINERY
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