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Common steel boriding and quenching combined treatment process

A composite treatment, general-purpose steel technology, applied in the field of heat treatment, can solve the problems of increased heat treatment processing costs, low versatility, etc., to prevent spalling, prolong service life, and reduce brittleness.

Inactive Publication Date: 2014-11-19
广州市广智机电工业研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Among the relevant patents or papers published above, some are researching new boronizing agent formulations, or simulating carburizing and other controlled atmosphere furnaces to adopt instillation boronizing; some use microwave, plasma and other means, and some need to nano Chemical treatment increases the cost of heat treatment; some work hard for a specific steel grade, and the versatility is not great

Method used

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  • Common steel boriding and quenching combined treatment process
  • Common steel boriding and quenching combined treatment process
  • Common steel boriding and quenching combined treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The boriding and quenching composite treatment process of hot work die steel H13 (4Cr5MoSiV1) includes the following steps:

[0037] (1) Clean and preheat the commonly used hot work die steel H13 workpiece, heat it at 100°C for 1 hour and dry it, place it in a container filled with solid powdery boronizing agent, and send it into an RJ or FXL heat treatment furnace;

[0038] (2) Raise the temperature of the furnace to 200°C and keep it warm for 3 hours;

[0039] (3) Raise the furnace temperature to 550-600°C at a temperature of 60-70°C / h, and keep it warm for 4 hours;

[0040] (4) Raise the furnace temperature to 1000°C at a temperature of 60-70°C / h and keep it warm for 6 hours;

[0041] (5) Quenching: Lift out the workpiece and quench it out of the furnace;

[0042] (6) Tempering: Tempering at 560°C for 2 to 3 times.

[0043] The boronizing temperature of hot work die steel H13, Cr12MoV, Cr12, and 2Cr13 is very close to the quenching temperature, so it is directly b...

Embodiment 2

[0047]The boronizing and quenching composite treatment process of medium carbon quenched and tempered steel 40Cr includes the following steps:

[0048] (1) Clean and preheat the commonly used medium carbon quenched and tempered steel 40Cr workpiece, heat it at 200°C for 2 hours and dry it, place it in a container filled with solid powder boronizing agent, and send it into an RJ or FXL heat treatment furnace ;

[0049] (2) Raise the temperature of the furnace to 200°C and keep it warm for 3 hours;

[0050] (3) Raise the furnace temperature to 550-600°C at a temperature of 70-80°C / h, and keep it warm for 4 hours;

[0051] (4) Raise the furnace temperature to 930-1000°C at a temperature of 70-80°C / h, and keep it warm for 6 hours;

[0052] (5) Lower the furnace temperature to 850°C and keep it warm for 2 to 3 hours;

[0053] (6) Quenching: Lift out the workpiece and quench it out of the furnace;

[0054] (7) Tempering: 1 or 2 times at a low temperature of 200°C.

[0055] The ...

Embodiment 3

[0059] The boriding and quenching composite treatment process of niobium-containing high-speed steel 65Nb comprises the following steps:

[0060] (1) Clean and preheat the niobium-containing high-speed steel 65Nb (65Cr4W3Mo2VNb) workpiece, dry it at 150°C for 1.5h, place it in a container filled with solid powder boronizing agent, and send it to RJ or FXL heat treatment in the furnace;

[0061] (2) Raise the temperature of the furnace to 200°C and keep it warm for 3 hours;

[0062] (3) Raise the furnace temperature to 550-600°C at a temperature of 50-60°C / h and keep it warm for 4 hours;

[0063] (4) Raise the furnace temperature to 930°C to 1000°C at a temperature of 50°C to 60°C / h, and keep it warm for 6 hours.

[0064] (5) Slowly raise the temperature of the furnace to 1080°C-1100°C and keep it warm for 2-3 hours;

[0065] (6) Quenching: Lift out the workpiece and quench it out of the furnace;

[0066] (7) Tempering: Tempering 3 times at 560°C.

[0067] The metallograph...

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Abstract

The invention relates to a common steel boriding and quenching combined treatment process which comprises the following steps: cleaning a workpiece, preheating and drying; putting the workpiece into a container filled with a boriding agent, putting the container into a heat treatment furnace, and segmentally heating to a constant boriding temperature; heating or cooling to the quenching temperature of the workpiece in the furnace; discharging the workpiece from the furnace and directly quenching; tempering. The process has the beneficial effects that the boronized workpiece in the container is not discharged from the furnace, is heated or cooled to the quenching temperature and then is discharged from the furnace and directly quenched; boriding and quenching are combined for use, the workpiece is directly heated in the furnace, and a single Fe2B structure can be obtained, so that the structure property can be improved, the brittleness is reduced, and the stripping is prevented; a boriding layer is metallurgically bonded with a base body, so that the service life of the workpiece is prolonged; moreover, the process is suitable for boriding treatment of existing most steel and iron and is very good in commonality. The process can be applied to boriding and quenching of common steel.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a composite boronizing and quenching treatment process for general steel. Background technique [0002] Boronizing is a chemical heat treatment method in which active boron atoms precipitated by chemical reactions are absorbed and diffused on the surface of a workpiece placed in a high-temperature boronizing medium to form a boronized layer. After boronizing treatment, the surface scratch resistance, high temperature oxidation resistance, corrosion resistance and red hardness of the workpiece are far superior to carburizing, nitriding, cyaniding and nitrocarburizing, because of its high surface wear resistance , The friction coefficient is small, on the one hand, it can improve the performance (mechanical, physical, chemical properties) of the workpiece surface, and greatly prolong the service life of the workpiece; on the other hand, ordinary carbon steel or low alloy steel can rep...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C8/70C21D1/18
Inventor 高阳张小聪冯志军
Owner 广州市广智机电工业研究所有限公司
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