A kind of ferrous metal liquid die forging die and preparation method

A liquid die forging, ferrous metal technology, applied in coating and other directions, can solve the problems of complicated brushing and use process, lower mold temperature, and high pouring temperature, and achieve the goal of promoting stable production, improving mold life, and improving molding quality. Effect

Active Publication Date: 2016-02-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pouring temperature of black metal liquid die forging is as high as 1600 ℃, it is difficult to reduce the temperature of the mold to a reasonable working range only by the heat insulation of the coating
The service life of the mold is closely related to the use temperature, if the temperature is too high beyond its reasonable working range, the mold will fail quickly
At the same time, the process of painting and using the paint is complicated

Method used

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  • A kind of ferrous metal liquid die forging die and preparation method
  • A kind of ferrous metal liquid die forging die and preparation method
  • A kind of ferrous metal liquid die forging die and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] S1. Design and manufacture a mold according to the liquid die forging to be formed. The liquid die forging to be formed is a liquid die forging with a diameter of 200mm and a height of 300mm made of cast steel, and the pouring temperature of the cast steel is 1590°C. Design the liquid die forging process and liquid die forging die according to the existing technology. The die material is H13 steel (the suitable working temperature range is 350-650°C). According to the strength requirements, the die is processed into a cylindrical shape with a diameter of 90mm and a height of 300. .

[0043] S2. Spray a layer of zirconia coating on the surface of the cavity of the mold by plasma thermal spraying, which can have good anti-oxidation and heat insulation effects on the mold matrix, and the thickness of the coating is 0.2-0.5mm.

[0044]S3. Install a copper sleeve on the outside of the mold, and the copper sleeve is provided with a spiral cooling water channel, and the spira...

Embodiment 2

[0049] The size of the workpiece to be formed is the same as that in Implementation 1, the material of the workpiece is changed to cast iron, and the pouring temperature is 1400°C. Referring to the mold processing process of Example 1, the mold, copper sleeve and support sleeve were processed respectively, and the zirconia coating on the surface of the mold was replaced with an alumina coating. Preheat the mold to about 250°C, and paint a layer of diatomaceous earth paint on the surface of the mold before liquid forging each forging.

[0050] According to the finite element simulation results, it is found that from Figure 4 It can be seen that the surface temperature of the mold cavity drops to about 540°C, which is within the working temperature range of the mold. and Figure 5 The temperature of the copper sleeve in the mold is also far lower than the softening temperature of chromium-zirconium copper, 550°C, so the whole mold system can meet the working environment of fe...

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Abstract

The invention relates to a ferrous metal liquid die forging mould and a manufacturing method of the metal liquid die forging mould. A zirconium oxide or aluminum oxide coating is arranged on the inner surface of a mould cavity, diatomite thermal insulation coatings are arranged on the surface of the coating, the mould is sleeved with a copper sleeve, the copper sleeve is provided with a spiral cooling water channel which is arranged on the two sides and the bottom of the mould, and the copper sleeve is further sleeved with a supporting sleeve. The method comprises the following steps that (1), the mould is designed and manufactured according to a liquid die forge piece to be formed; (2), the zirconium oxide or aluminum oxide coating is sprayed on the inner surface of the mould cavity; (3), the mould is sleeved with the copper sleeve, the spiral cooling water channel is arranged on the copper sleeve, and the spiral cooling water channel is arranged on the two sides and the bottom of the mould; (4), the copper sleeve is sleeved with the supporting sleeve; (5), before each liquid die forge piece is forged, the diatomite thermal insulation coatings need to be sprayed on the surface of the coating of the mould. According to the ferrous metal liquid die forging mould and the manufacturing method of the metal liquid die forging mould, the temperature of the mould is decreased, and the service life of the ferrous metal liquid die forging mould is prolonged.

Description

technical field [0001] The invention relates to the field of metal liquid die forging, and more specifically, relates to a black metal liquid die forging die and a preparation method thereof. Background technique [0002] Ferrous metal refers to steel and cast iron. The pouring temperature range of steel liquid die forging is 1530-1600°C, and the temperature range of cast iron liquid die forging is 1300-1420°C. In the existing ferrous metal liquid die forging production process, due to the high pouring temperature, the mold temperature can usually rise above 1000°C, resulting in high-temperature tempering, and ordinary heat treatment is difficult to play a role, so the surface hardness of the mold is rapidly reduced and softened, resulting in mold Failure forms such as erosion, thermal fatigue and plastic deformation appear, which lead to a greatly reduced mold life, increased production costs, and it is difficult to achieve industrial stable production. [0003] Huo Wencan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/02C09D1/00C09D7/12
Inventor 王华君李相超桂千富冀运东徐德鑫彭春宇姚亮
Owner WUHAN UNIV OF TECH
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