Ferrous metal liquid die forging mould and manufacturing method thereof

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

Active Publication Date: 2014-04-09
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 lif

Method used

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  • Ferrous metal liquid die forging mould and manufacturing method thereof
  • Ferrous metal liquid die forging mould and manufacturing method thereof
  • Ferrous metal liquid die forging mould and manufacturing method thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0041] Example 1:

[0042] S1. Design and make 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 whose material is cast steel. The casting temperature of the cast steel is 1590°C. The liquid forging process and liquid forging die are designed according to the existing technology. The die material is H13 steel (suitable working temperature range is 350-650℃), and the die is processed into a cylindrical shape with a diameter of 90mm and a height of 300 according to the strength requirements. .

[0043] S2. A layer of zirconia coating is sprayed on the surface of the mold cavity by plasma thermal spraying, which can play a good role in oxidation resistance and heat insulation to the mold substrate, and the coating thickness is 0.2-0.5mm.

[0044] S3. A copper sleeve is placed on the outside of the mold, and the copper sleeve is provided with spiral cooling water channels, ...

Example Embodiment

[0048] Example 2:

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

[0050] Through the finite element simulation results, we 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 middle is also much lower than the softening temperature of chrome-zirconium copper, 550℃, so the entire mold system can meet the working environment of ferrous metal liquid...

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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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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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