A method for strengthening the surface properties of carbon steel workpieces

A technology of workpiece surface and carbon steel, which is applied in the field of strengthening the surface performance of carbon steel workpieces, can solve the problems of high cost, expensive equipment, and low production efficiency, and achieve fine and compact structure, high energy utilization rate, and improved surface hardness. Effect

Active Publication Date: 2017-01-18
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These technologies have been widely used at present, but there are problems such as complicated process, low production efficiency, low energy utilization rate, expensive equipment, and high cost.

Method used

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  • A method for strengthening the surface properties of carbon steel workpieces
  • A method for strengthening the surface properties of carbon steel workpieces
  • A method for strengthening the surface properties of carbon steel workpieces

Examples

Experimental program
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Effect test

example 1

[0029] (1) Select carbon tool steel T8 paper cutter as the processing object, and select tungsten alloy wire with a diameter of Ф8mm as the consumable metal electrode wire;

[0030] (2) Propane is selected as the combustible gas and mixed with oxygen in proportion C3H8:O2=1:5. The process parameters are set as follows: mixed gas pressure 0.35MPa, flow rate 23L / min.

[0031] (3) Select 5kv pulse high voltage power supply;

[0032] (4) Three kinds of energy superposition of electric explosion, gas explosion and plasma are used to treat the surface of T8 paper cutter. Adjust the distance between the nozzle of the pulse plasma gun and the paper cutter to 50mm, and the high-energy particle jet bombards the surface of the paper cutter in the atmospheric environment with a pulse frequency of 5HZ, and the sample processing time is 30s;

[0033] Using a scanning electron microscope (SEM) to observe the cross-sectional morphology of the T8 paper cutter after treatment, through figur...

example 2

[0038] (1) Select carbon tool steel T10 tap as the processing object, and select tungsten alloy wire with a diameter of Ф4mm as the consumable metal electrode wire;

[0039] (2) Choose methane as the combustible gas and mix it with oxygen in proportion CH4:O2=1:3.5. The process parameters are set as follows: mixed gas pressure 0.5MPa, flow rate 35L / min.

[0040] (3) Select 4kv pulse high-voltage power supply;

[0041] (4) Three kinds of energy superposition of electric explosion, gas explosion and plasma are used for surface treatment of T10 taps. Adjust the distance between the nozzle of the pulse plasma gun and the tap to 80mm, the tap rotates at a speed of five revolutions per minute, and bombards the surface of the tap with a pulse frequency of 15HZ in the atmospheric environment, and the sample processing time is 20s;

[0042] The treated T10 tap was installed on the machine tool for trial, and its service life was increased by 2-4 times compared with the unstrengthened...

example 3

[0044] (1) Select 45 steel gears as the processing object, and select molybdenum alloy wire with a diameter of Ф4mm as the consumable metal electrode wire;

[0045] (2) Propane is selected as the combustible gas and mixed with oxygen in proportion C3H8:O2=1:5. The process parameters are set as follows: mixed gas pressure 0.75MPa, flow rate 30L / min.

[0046] (3) Choose a voltage of 3kv;

[0047] (4) The surface treatment of 45 steel gears is carried out by superimposing two kinds of energy, gas explosion and plasma. Adjust the distance between the nozzle of the pulse plasma gun and the gear to 60mm, the gear rotates at a speed of ten revolutions per minute, and the high-energy particle jet bombards the surface of the 45 steel gear in the atmospheric environment with a pulse frequency of 10HZ, and the sample processing time is 20s ;

[0048] Using a scanning electron microscope (SEM) to observe the cross-sectional morphology of the treated sample, it can be seen from Figure 5(a...

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Abstract

The invention discloses a method for reinforcing property of carbon steel workpiece surface. The method comprises the following steps: stack processing the surface of the carbon steel by using high energy, adopting a bipolar consumable metal electrode to melt and gasify the electrode, by adopting the explosion of the mixed combustion gas and the point discharge of the pulse high voltage, making the consumable metal electrode form a high-energy particle, under the explosion of the mixed combustion gas and the acceleration of the electromagnetic field, acting the high-energy particle on the surface of the carbon steel workpiece with an extrahigh energy density and speed to perform alloying reaction so as to increase the surface property of the carbon steel workpiece. A uniform modifying layer with the thickness of 55-100mu m is formed on the surface of the reinforced carbon steel workpiece, the modified layer includes two areas, the outer layer tissue is a cryptocrystalline martensite and permeates a metal electrode element, and the inner layer is an incomplete quenching area without metal element permeation; the surface modified layer tissue is small and compact; the surface hardness is higher than that of the matrix; and the abrasive resistance is increased by 3 times. The method is suitable for processing the surface of the carbon steel workpiece and can be widely used in the machinery and aviation fields.

Description

technical field [0001] The invention relates to a method for strengthening the surface performance of a carbon steel workpiece, which is used for improving the surface performance of the carbon steel and belongs to the technical field of metal material surface treatment. Background technique [0002] With the rapid development of high-tech, people have higher and higher requirements on the surface properties of materials, especially under the conditions of high speed, high temperature, high pressure, heavy load, corrosive medium, etc., the failure of many parts is often due to the inability of the material surface Competent due to harsh service conditions, such as wear resistance, corrosion resistance and surface oxidation. Local damage to the surface of the material accelerates the failure of the entire component, eventually leading to the shutdown of the entire set of equipment, causing significant losses to industrial production. Therefore, it is particularly urgent to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09C21D1/06
CPCC21D1/06C21D1/09
Inventor 陆磊张林伟邹晋陆德平余玖明廖先金周喆付青峰
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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