Method for improving mechanical property of automobile covering part

A technology for automobile covers and covers, which is applied in the direction of reducing gas emissions, can solve the problems of poor tempering stability, increased welding, and increased cost, and achieves the effects of balanced performance improvement, reduced segregation, and simplified processing.

Active Publication Date: 2020-12-25
MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing processing of cover parts, in order to improve its mechanical properties, the content of molybdenum, nickel, chromium and other metals is chosen to increase, which not only increases the cost, but also leads to poor tempering stability during processing, and also increases the difficulty of welding Spend

Method used

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  • Method for improving mechanical property of automobile covering part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for improving the mechanical properties of automobile panels. In the processing of automobile panels, the prepared inorganic nanopowder is added to the base alloy melt of the panel, and the addition amount is 0.012% of the mass fraction of the alloy melt. Melting and mixing Uniform, pouring molding then, be processed into automobile cover part; The preparation method of described inorganic nanopowder comprises the following steps:

[0019] (1) Put 0.25 moles of chromium trioxide powder in a beaker, add 100 ml of potassium bromate solution, heat in a constant temperature water bath at 60°C, stir and dissolve at 300 rpm for 30 minutes, add 20 ml of ethanol, and stir After uniformity, add 5 ml of hydrochloric acid solution dropwise, age in a closed thermostat for 2 days, place the aged mixed solution in a drying cylinder in a supercritical drying oven, set the temperature at 2°C, feed in liquid carbon dioxide, replace and remove Ethanol and water, then slowly rele...

Embodiment 2

[0028] A method for improving the mechanical properties of automobile panels. In the processing of automobile panels, the prepared inorganic nanopowder is added to the base alloy melt of the panel, and the addition amount is 0.013% of the mass fraction of the alloy melt. Melting and mixing Uniform, pouring molding then, be processed into automobile cover part; The preparation method of described inorganic nanopowder comprises the following steps:

[0029] (1) Put 0.26 moles of chromium trioxide powder in a beaker, add 105 ml of potassium bromate solution, heat in a constant temperature water bath at 65°C, stir and dissolve at 330 rpm for 35 minutes, add 25 ml of ethanol, and stir After uniformity, add 5.5 ml of hydrochloric acid solution dropwise, age in a closed thermostat for 2 days, place the aged mixed solution in a drying cylinder in a supercritical drying oven, set the temperature at 3°C, feed in liquid carbon dioxide, replace and remove Ethanol and water, then slowly re...

Embodiment 3

[0038]A method for improving the mechanical properties of automobile panels. In the processing of automobile panels, the prepared inorganic nanopowder is added to the base alloy melt of the panel, and the addition amount is 0.014% of the mass fraction of the alloy melt. Melting and mixing Uniform, pouring molding then, be processed into automobile cover part; The preparation method of described inorganic nanopowder comprises the following steps:

[0039] (1) Put 0.27 moles of chromium trioxide powder in a beaker, add 110 ml of potassium bromate solution, heat in a constant temperature water bath at 70°C, stir and dissolve at 350 rpm for 40 minutes, add 30 ml of ethanol, and stir After uniformity, add 6 ml of hydrochloric acid solution dropwise, age in a closed thermostat for 3 days, place the aged mixed solution in a drying cylinder in a supercritical drying oven, set the temperature at 4°C, feed in liquid carbon dioxide, replace and remove Ethanol and water, then slowly relea...

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Abstract

The invention relates to the technical field of new material machining and discloses a method for improving the mechanical property of an automobile covering part. Inorganic nano powder is added intoa cast iron alloy, the melting property is good, the purity, density, isotropy and uniformity of the alloy steel can be improved, quenching is uniform, segregation is reduced, heat treatment deformation is small, and the process is easy to control; the covering part prepared through machining is extremely good in mechanical strength and mechanical property, the tensile strength reaches 850 MPa-880MPa, the hardness reaches 300 HB-310 HB, the elongation reaches 6.5%-7.0%, the impact toughness reaches 42 J / cm<2>-45 J / cm <2>, meanwhile, the covering part has excellent performance in heat resistance, corrosion resistance, abrasion resistance and other special properties, and machining of complex and precise covering parts is simplified; and the automobile covering part prepared through the method is high in toughness and impact resistance and good in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of new material processing, and in particular relates to a method for improving the mechanical properties of automobile covering parts. Background technique [0002] Automobile panels refer to the surface or internal parts of the space shape made of thin metal plates that cover the engine, chassis, cab, and body. According to function and location, it can be divided into three categories: external covering, internal covering and skeleton covering. They have different characteristics from general stamping parts in terms of process design, mold processing, equipment selection and quality control (dimensional tolerance, shape accuracy, part stiffness, surface quality), etc. The basic processes of stamping and forming of automobile panels are: blanking, pre-bending, drawing, trimming, punching, flanging, shaping, etc. (see table). Automobile panels with a typical structure generally require 4 to 6 processes, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/20C22C33/04C22C38/00C22C38/02C22C38/42C22C38/44C22C38/58C22C38/60
CPCB22D27/20C22C33/04C22C38/002C22C38/008C22C38/02C22C38/42C22C38/44C22C38/58C22C38/60Y02P10/122
Inventor 李孙德
Owner MAANSHAN SANCHUAN MACHINERY MFG CO LTD
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