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Preparation method of ferrous metal with high hard, smooth and corrosion-resistant surface

A ferrous, high-hard technology, applied in the field of metal material surface processing, mineral materials and mechanical tribology, to achieve the effect of improving surface hardness, reducing mass loss, and improving high temperature resistance

Active Publication Date: 2020-02-11
中建材科创新技术研究院(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, layered silicates such as serpentine are mainly used in existing mechanical equipment. By simulating the friction environment, the relationship between key process parameters and metal surface properties is ascertained, and the metal surface is actively treated and the specified design of the metal surface is obtained. The technical development of the indicator is still blank

Method used

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  • Preparation method of ferrous metal with high hard, smooth and corrosion-resistant surface
  • Preparation method of ferrous metal with high hard, smooth and corrosion-resistant surface
  • Preparation method of ferrous metal with high hard, smooth and corrosion-resistant surface

Examples

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Effect test

Embodiment example 1

[0029] Prepared on the surface of pure iron with a width of 2 cm and an area of ​​63 cm 2 Ring-shaped high-hard, smooth and corrosion-resistant surface, the design index is: the surface hardness is doubled (the original surface Vickers hardness is 135); the smoothness is ≤0.1um (the original surface roughness Ra of pure iron is 1.0um); After being corroded in alkaline solution for 20 hours, the mass loss is reduced by more than 45%.

[0030] The pure iron sample to be treated is made into friction pair 1, and the grinding pair 2 is a notched annular pure iron sample. The outer radius of the notched ring-shaped grinding pair 2 sample is 6cm, and the inner radius is 4cm. The basic structure of friction pair 1 Indicate as figure 1 shown. The pure iron sample to be processed is fixed, and a load is applied to the notched annular grinding pair 2, which is driven to rotate by a motor.

[0031] The friction pair lubrication method is lubricating oil splash lubrication (that is, th...

Embodiment example 2

[0036]A 20cm×20cm ductile iron high-hardness, smooth, and corrosion-resistant surface is prepared. The design indicators are: the surface hardness is increased by more than 70% (the Rockwell hardness of the original surface of the ductile iron is 141); the surface roughness is ≤ 0.09 um (the original surface of the ductile iron is rough Degree of 0.4um,); corrosion resistance 3.5wt%NaCl neutral solution after 20 hours of corrosion, the mass loss is reduced by more than 35%.

[0037] The nodular cast iron sample to be treated is made into friction pair 1, the opposite grinding pair 2 is 45# steel, the surface roughness of the opposite grinding pair 45# steel is 0.3um, and the opposite grinding pair 45# steel is a cube of 3cm×3cm×3cm . The basic structure of friction pair 1 is shown as figure 2 As shown, the ductile iron is fixed, and the load is applied to the grinding pair. The grinding pair 2 is driven by external force to perform periodic reciprocating sliding friction, ea...

Embodiment example 3

[0043] A high hardness, smooth and corrosion-resistant surface is prepared on the surface of the cylinder (excluding the bottom surface). The cylinder is 10cm high, the bottom circle radius is 4cm, the material is low carbon steel, the original surface roughness of the cylinder is 1.1um, and the design index is: surface The hardness is increased by 55% (the Rockwell hardness of the original surface of low carbon steel is 71); the surface roughness is ≤0.6um; the mass loss is reduced by more than 40% after being corroded in 3.5wt% NaCl neutral solution for 20 hours.

[0044] The cylinder to be treated is made into friction pair 1, and the opposite grinding pair 2 is a low-carbon steel arc, the surface roughness of the arc is 0.74um, the arc of the arc is 120º, the radius is 4cm, and the width is 10cm. The basic structure is shown as image 3 shown. The arc is held stationary and the load is applied to the arc. The cylinder rotates under the drive of the motor.

[0045] The l...

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Abstract

The invention discloses a preparation method of ferrous metal with a high hard, smooth and corrosion-resistant surface. The preparation method includes the following steps that a metal sample to be treated is made into friction pairs, materials of the friction pairs are the same as those of the metal sample to be treated and hardness is similar, initial surface smoothness Ra of the two pairs is less than or equal to 1.6[mu]m, lubricating materials are used for lubricating,include lubricating oil, grease, and emulsion which contain serpentine, attapulgite, kaolinite, montmorillonite and other minerals, and methods of splash lubrication and forced lubrication are adopted. Contact forms of the friction pairs include surface-to-surface contact and line-to-surface contact, friction forms include sliding friction and rolling friction, accumulated friction movement time is not less than 72 hours, the process method is relatively simple, and one process section can achieve a comprehensive goalof "improving the surface hardness, smoothness and corrosion resistance", and has a certain promotion value.

Description

Technical field: [0001] The invention relates to the fields of metal material surface processing, mineral materials and mechanical tribology, in particular to a method for preparing a high-hard, smooth, corrosion-resistant surface of ferrous metals. Background technique: [0002] Ferrous metals and their alloys are industrially collectively referred to as iron, chromium and manganese, including the alloy materials of these three metals. They are the most widely used metal materials today. Taking iron-based metal materials as an example, almost 90% of mechanical parts The components are all made of iron-based materials, especially widely used in various friction parts. According to statistics, about 30% of the world's primary energy is consumed due to friction each year, about 60% of machine parts fail due to friction, and about 50% of mechanical equipment vicious accidents originate from lubrication failure and excessive wear. Wear means a lot. In order to improve the stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00B24B15/08
CPCB24B1/00B24B15/08
Inventor 李桂金张忠伦刘晶白志民
Owner 中建材科创新技术研究院(山东)有限公司
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