A processing method for improving aluminum die casting and precision forging dies

A processing method, aluminum die-casting technology, applied in the direction of metal processing equipment, metal material coating technology, solid diffusion coating, etc., can solve the problem of reducing the use efficiency, increasing the cost of mold use, and not being able to effectively improve the life of the mold and the demoulding effect, etc. problem, to achieve the effect of smooth element distribution gradient, increased fluidity, and high cost performance

Active Publication Date: 2019-12-10
湖南红宇智能制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional methods such as gas nitriding and ion nitriding are usually used for surface strengthening without changing the mold structure, processing accuracy, material and heat treatment state, but the current technical level is still unable to effectively improve the mold life and demoulding effect
For example, in the aluminum alloy hot pressing mold, it is necessary to use a release agent to ensure that there is no aluminum liquid adhesion inside the mold, which not only increases the use cost of the mold, but also reduces the use efficiency

Method used

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  • A processing method for improving aluminum die casting and precision forging dies
  • A processing method for improving aluminum die casting and precision forging dies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of processing method that improves die-casting mold (material is the aluminum die-casting mold of Sweden ASSAB 8407 steel) performance, comprises the following steps:

[0033] (1) Soaking: remove the residual aluminum attached to the surface of the mold during the pressure test, the temperature is ≥30°C, and the time is 80 minutes;

[0034] (2) Preheating: Put the mold into the air heating tank, heat up to 345±5°C at a speed of 10°C / min, keep it warm for 15 minutes, then raise the temperature to 425±5°C at a speed of 10°C / min, and keep it warm for 20 minutes ;

[0035] (3) Lanthanum yttrium carbonitride ion infiltration: put the preheated mold into the lanthanum yttrium carbonitride ion infiltration tank, use the lanthanum yttrium carbonitride ion infiltration agent to infiltrate the lanthanum yttrium carbonitride ion, the temperature is 445±5℃ , the time is 100 minutes;

[0036] (4) lanthanum yttrium ion activation: put the mold infiltrated with carbon nitroge...

Embodiment 2

[0046] A processing method for improving the performance of a die-casting die (material is an aluminum die-casting die of SKD61), comprising the following steps:

[0047] (1) Soaking: remove the residual aluminum attached to the surface of the mold during the pressure test, the temperature is ≥30°C, and the time is 80 minutes;

[0048] (2) Preheating: Put the mold into the air heating tank, heat up to 345±5°C at a speed of 15°C / min, keep it warm for 10 minutes, then raise the temperature to 400±5°C at a speed of 10°C / min, and keep it warm for 30 minutes ;

[0049] (3) Lanthanum yttrium carbonitride ion infiltration: put the preheated mold into the lanthanum yttrium carbonitride ion infiltration tank, use the lanthanum yttrium carbonitride ion infiltration agent to infiltrate the lanthanum yttrium carbonitride ion, the temperature is 450±5℃ , the time is 150 minutes;

[0050] (4) Lanthanum yttrium ion activation: put the mold infiltrated with lanthanum yttrium ions into the i...

Embodiment 3

[0060] A processing method for improving the performance of a precision forging die (material is a precision forging die of H13), comprising the following steps:

[0061] (1) Soaking: remove the residual aluminum attached to the surface of the mold during the pressure test, the temperature is ≥30°C, and the time is 60 minutes;

[0062] (2) Preheating: Put the mold into the air heating tank, raise the temperature to 300±5°C at a rate of 10°C / min and keep it warm for 10 minutes, then raise the temperature to 395±5°C at a rate of 5°C / min and keep it warm for 30 minutes;

[0063] (3) Infiltration of lanthanum yttrium carbonitride ions: put the preheated mold into the lanthanum yttrium carbonitride ion infiltration tank, use lanthanum carbonitride yttrium ion infiltration agent to infiltrate lanthanum yttrium carbonitride ions, the temperature is 455±5℃ , the time is 200 minutes;

[0064](4) lanthanum yttrium ion activation: put the mold infiltrated with lanthanum yttrium carbon n...

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Abstract

The invention discloses a machining method for improving an aluminum pressure casting and precision forging die. According to the method, a carbon, nitrogen, lanthanum and yttrium permeability agent,a lanthanum and yttrium excitation permeability agent and an oxygen ion permeability agent are used, a non-metallic element and a trace metal element permeate the surface of a die base body, a carbon,nitrogen, lanthanum and yttrium diffusion layer and an oxygen ion diffusion layer are formed, the service life of the die is greatly prolonged, the treated die has the good mechanical property, and the die accuracy is not influenced by surface treatment. A permeable layer element distribution gradient of the die is gentle, a compound layer is not formed, the overall die surface stress distribution is even, and die surface peeling, layering and the like are avoided. According to the machining method, the permeability agent melting points are low, mobility is good, the permeable layer quality is more even and stable, treatment can be carried out at lower temperature, the diffusion efficiency of carbon, nitrogen, lanthanum and yttrium ions in the base body can be improved, and the activationenergy of diffusion is reduced.

Description

technical field [0001] The invention relates to the field of molds, in particular to a processing method for improving the performance of aluminum die-casting and precision forging molds. Background technique [0002] Mold is the main processing tool for mechanically manufacturing batch parts in the modern machining industry. The quality of the mold directly affects the precision, output and production efficiency of the finished product. The quality and service life of the mold not only depend on reasonable structural design and processing accuracy, but also are affected by the mold material, heat treatment and surface strengthening treatment. At present, conventional methods such as gas nitriding and ion nitriding are usually used for surface strengthening without changing the mold structure, processing accuracy, material and heat treatment state, but the current technical level is still unable to effectively improve the mold life and demoulding effect . For example, in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C12/00B22D17/22B21J5/02
CPCB21J5/02B22D17/2209C23C12/00
Inventor 罗德福陈甥怡李建华
Owner 湖南红宇智能制造有限公司
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