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Diamond nano-modified 42CrMo steel as well as preparation method and application of diamond nano-modified 42CrMo steel

A nano-modification and diamond technology is applied in the field of diamond nano-modified steel composite materials, which can solve the problems of long penetration time and achieve the effects of fast penetration speed, no environmental pollution, and low requirements for processing technology conditions.

Inactive Publication Date: 2014-09-24
史宝光 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses nano-structured carbon as a penetration aid, and the penetration layer is still relatively thin, and the penetration time is long. The physical properties of the modified steel still need to be further improved.

Method used

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  • Diamond nano-modified 42CrMo steel as well as preparation method and application of diamond nano-modified 42CrMo steel
  • Diamond nano-modified 42CrMo steel as well as preparation method and application of diamond nano-modified 42CrMo steel
  • Diamond nano-modified 42CrMo steel as well as preparation method and application of diamond nano-modified 42CrMo steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Sand blowing:

[0033] A sandblasting machine is used to spray quartz sand onto the surface of the 42CrMo steel workpiece at high speed, and the impact and surface hardening effect of the abrasive on the surface of the workpiece are used.

[0034] (2) Chemical cleaning:

[0035] The 42CrMo steel workpiece after sandblasting is treated with chemicals (for example, C 2 h 5 OH, acetone, etc.) to clean the oil and debris on the surface of the 42CrMo steel substrate.

[0036] (3) Powder mixing:

[0037] Add an appropriate amount of diamond nano powder, and then add sodium alkylbenzene sulfonate as a dispersant. The amount of sodium alkylbenzene sulfonate added is 1-8‰ of the weight of diamond nano powder, which is determined by the weight of diamond nano powder and the required penetration depth. For example, the process consumption of penetrant diamond nanopowder and dispersant sodium alkylbenzene sulfonate can be calculated with reference to the method of the exist...

Embodiment 2

[0048] The implementation process of this example is basically the same as that of Example 1. For the results of the preparation steps, adjustment of process parameters and performance test, see Table 2, Table 3, and Table 4 for details.

[0049] The diamond nano-modified 42CrMo steel workpiece is used to make light and heavy mine car track shoes.

Embodiment 3

[0051] The implementation process of this example is basically the same as that of Example 1. For the results of the preparation steps, adjustment of process parameters and performance test, see Table 2, Table 3, and Table 4 for details.

[0052] The diamond nano-modified 42CrMo steel workpiece is used to make excavator bucket teeth.

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Abstract

The invention discloses diamond nano-modified 42CrMo steel as well as a preparation method and application of the diamond nano-modified 42CrMo steel. Nanodiamond is rapidly dispersed on a 42CrMo steel matrix under thermal treatment by taking sodium alkyl benzene sulfonate as a dispersing agent, glyceryl stearate as a penetrating agent and diamond nanopowder as a modifying agent, so that the 42CrMo steel is converted into an austenite, and meanwhile, the nanometer reconstruction of a surface layer is realized. The toughness and plasticity of the diamond nano-modified 42CrMo steel are equal to those of the 42CrMo steel matrix, but the hardness of the diamond nano-modified 42CrMo steel is up to HRC66-72, the tensile strength of the diamond nano-modified 42CrMo steel ranges from 1750MPa to 2200MPa, and the wear resistance of the diamond nano-modified 42CrMo steel is ten times as much as that of nitriding alloy steel, so that the diamond nano-modified 42CrMo steel can be applied to driving of machines such as ships, vehicles, mining equipment and the like and wear-resistant equipment to prolong the service life of the equipment and reduce maintenance, occupied space, equipment weight and energy consumption.

Description

technical field [0001] The invention relates to the technical field of diamond nano-modified steel composite materials, and particularly discloses a diamond nano-modified 42CrMo steel and its preparation method and application. Background technique [0002] Diamonds with micro-nano particles can enter the interior of the steel under certain conditions, changing the microstructure and mechanical properties of the steel, so that the steel has different and continuously changing microstructure and properties from the surface to the interior, and obtains steel-based nano-diamond composites. Material. [0003] For example, patent CN1380438A discloses a new method for diamond infiltration on the surface of steel. The steel is installed in a heat treatment furnace so that the infiltrated part of the steel is kept in contact with the diamond powder. The infiltration temperature is controlled in the austenite zone. Fe-Fe 3 Above the C-S-E line and below the N-J-E line in the C phase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/66
Inventor 史宝光王严岩孙玉辉
Owner 史宝光