Mixed salt process to preparing in-situ reinforced Mg-based composite material

A composite material and mixed salt technology, which is applied in the process of preparing composite materials and the field of in-situ reinforced magnesium-based composite materials prepared by the mixed salt method, can solve the problems such as difficulty in salt reaction, and achieve good interface bonding, good mechanics, fine particle effect

Inactive Publication Date: 2003-09-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the temperature required for the salt reaction is relatively high, and magnesium is easier to burn at high temperatures, it is difficult to carry out the salt reaction in magnesium.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1 adopts pure magnesium as base material, KBF 4 and K 2 TiF 6 As a reaction mixed salt, without stirring, it was poured after standing at 700°C for 5 minutes to prepare TiB with a mass percentage of 5%. 2 In situ reinforced magnesium matrix composites. The material has a tensile strength of 275MPa and an elongation of 1.2%.

Embodiment 2

[0014] Embodiment 2 pure magnesium is as matrix material, KBF 4 and K 2 TiF 6 As a reaction mixed salt, the steel paddle is stirred at 200r / min, the stirring time is 10min, and it is poured after standing at 700°C for 5min to prepare TiB with a mass percentage of 5%. 2 In situ reinforced composites. The material has a tensile strength of 280MPa and an elongation of 2.8%.

Embodiment 3

[0015] Example 3 ZM5 as the base material, KBF 4 and K 2 TiF 6 As a reaction mixed salt, the steel paddle is stirred at 600r / min, the stirring time is 20min, and it is poured after standing at 720°C for 15min to prepare TiB with a mass percentage of 5%. 2 In situ reinforced composites. The material has a tensile strength of 282MPa and an elongation of 2.7%.

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Abstract

The present invention relates to material technology and is mixed salt process to prepare in-situ reinforced Mg-base composite material. The process includes determining the alloy element components in the composite material, selecting the reinforcing phase based on the wettability between the substrate and the reinforcing phase whith ic controlled in 2-15 wt%, compounding and pretreating mixed salt system, smelting the magnesium substrate material and adding the pretreated mixed salt into the magnesium melt at proper temperature via stirring, and final casting after being let stand to form. The reinforcing phase is fine, homogeneously distributed and excellent in interface bindnig, and the Mg-base composite material has excellent mechanical and physical performance and may be used widely.

Description

technical field [0001] The invention relates to a process for preparing composite materials, in particular to a process for preparing in-situ reinforced magnesium-based composite materials by a mixed salt method, which belongs to the field of materials. Background technique [0002] In recent years, due to concerns about environmental and energy issues, research on magnesium-based composites has become a hot spot in the field of materials. Magnesium-based composite materials are one of the lightest structural materials, and magnesium-based composite materials have high specific strength and specific stiffness, good castability and dimensional stability, good resistance to electromagnetic interference and shielding, and good damping performance. The vibration performance is good. In addition, the waste recycling rate of the magnesium-based composite material is as high as 85%. Therefore, the development of magnesium-based composite materials is of great significance to energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C23/00C22C32/00
Inventor 王浩伟张修庆滕新营马乃恒易宏展
Owner SHANGHAI JIAO TONG UNIV
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