Preparation method for semisolid squeeze cast shaft sleeve part

A semi-solid extrusion and bushing technology, which is applied in the field of semi-solid forming, can solve the problems of solid-liquid segregation, easy separation of solid-liquid two phases, uneven structure of formed bushing parts, etc., achieving uniform structure, simple and convenient operation, Achieve the effect of continuous production

Active Publication Date: 2018-07-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional extrusion casting of semi-solid metal parts usually adopts a top-to-bottom positive extrusion process. During the extrusion process, it is found that the solid-liquid two phases are easily separated, resulting in solid-liquid segregation, which makes the structure of the formed sleeve parts uneven.

Method used

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  • Preparation method for semisolid squeeze cast shaft sleeve part
  • Preparation method for semisolid squeeze cast shaft sleeve part
  • Preparation method for semisolid squeeze cast shaft sleeve part

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A kind of preparation method of extrusion casting semi-solid ZCuSn10P1 copper alloy bushing parts described in the present embodiment, preparation selects mold such as Figure 2~3 As shown, the preparation method is as figure 1 As shown, the specific steps are as follows:

[0034] (1) The material in this example is ZCuSn10P1 copper alloy. The solidus temperature of the ZCuSn10P1 copper alloy was measured. The solidus temperature of the alloy was measured by differential scanning calorimetry (DSC) to be 876.1°C, and the liquidus temperature was 1024.2 ℃.

[0035] (2) Heat the rectangular ZCuSn10P1 copper alloy ingot to 500°C, where the size of the rectangular ingot is 25×25×150mm.

[0036](3) Hot rolling the heated rectangular ingot, the hot rolling process is as follows: the rolling speed is 4m / min, the rolling pass is 2 times, and the cumulative deformation is 16%.

[0037] (4) Cool the hot-rolled rectangular ingot to room temperature, and then cold-roll it. The co...

Embodiment 2

[0042] A kind of preparation method of extrusion casting semi-solid 7075 aluminum alloy shaft sleeve parts described in this embodiment, the preparation method is as follows figure 1 As shown, the specific steps are as follows:

[0043] (1) The material in this example is 7075 aluminum alloy. The solid-liquidus temperature of the 7075 aluminum alloy was measured, and the solid-liquidus temperature range of the alloy was measured by differential scanning calorimetry (DSC) to be 540-638°C.

[0044] (2) Heating the rectangular 7075 aluminum alloy ingot to 320°C, wherein the size of the rectangular ingot is 25×25×150mm.

[0045] (3) Hot rolling the heated rectangular ingot, the hot rolling process is as follows: the rolling speed is 2m / min, the rolling pass is 2 times, and the cumulative deformation is 12%.

[0046] (4) Cool the hot-rolled rectangular ingot to room temperature, and then cold-roll it. The cold-rolling process is as follows: the rolling speed is 0.5m / min, the rolli...

Embodiment 3

[0051] A kind of preparation method of extrusion casting semi-solid AZ91D magnesium alloy shaft sleeve parts described in this embodiment, the preparation method is as follows figure 1 As shown, the specific steps are as follows:

[0052] (1) The material in this example is AZ91D magnesium alloy. The solid-liquidus temperature of the AZ91D magnesium alloy was measured, and the solid-liquidus temperature range of the alloy was measured by differential scanning calorimetry (DSC), which was 470-595°C.

[0053] (2) Heating the rectangular AZ91D magnesium alloy ingot to 240°C, wherein the size of the rectangular ingot is 25×25×150mm.

[0054] (3) Hot rolling the heated rectangular ingot, the hot rolling process is as follows: the rolling speed is 3m / min, the rolling pass is 3 times, and the cumulative deformation is 18%.

[0055] (4) Cool the hot-rolled rectangular ingot to room temperature, and then cold-roll it. The cold-rolling process is as follows: the rolling speed is 1m / min...

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Abstract

The invention discloses a preparation method for a semisolid squeeze cast shaft sleeve part and belongs to the field of semisolid forming. The method comprises the steps that a rectangular cast ingotis heated to the temperature 50-100 DEG C higher than the recrystallization temperature through an induction heating furnace at first, then subjected to multidirectional multi-pass hot rolling, cooledto the room temperature, then subjected to multidirectional multi-pass cold rolling, and put into the induction heating furnace to be heated to the temperature 10-20 DEG C higher than the Tm after being cut, heat preservation is conducted for 10-15 min, then the rectangular cast ingot is conveyed into a die for semisolid bottom filling squeeze casting, a left concave die body and a right concavedie body are controlled to apply lateral pressure to a shaft sleeve after squeezing is completed, pressure is maintained, finally, the die is dismounted, the shaft sleeve part is taken out, and forming of the next part is conducted. The method adopts bottom filling squeezing, a squeezed part is stressed in three directions, the mechanical performance of the formed part is good, and the method is easy to operate, convenient to control, short in technological process and capable of achieving mechanical control.

Description

technical field [0001] The invention relates to a method for preparing a semi-solid extrusion casting shaft sleeve part, which belongs to the field of semi-solid forming. Background technique [0002] With the development of national industrialization, environmental protection, energy saving and consumption reduction are becoming more and more urgent, rational and effective use of resources, and improvement of product production efficiency are becoming more and more important. Metal semi-solid forming technology is one of the most promising forming technologies in the 21st century. Its short process and high efficiency have important guiding significance for saving resources and protecting the environment. [0003] Metal semi-solid forming technology is a method of forming semi-solid metal paste in the solid-liquid two-phase temperature range. Compared with traditional casting and forging, metal semi-solid forming technology has a higher comprehensive utilization rate of ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/00
CPCB22D17/007
Inventor 肖寒李乃拥熊迟段志科卢德宏周荣锋蒋业华
Owner KUNMING UNIV OF SCI & TECH
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