Protective Effects of a New Type Cover Gas on Molten Magnesium Alloy

Zhu Chao; Li Peijie; Li Zhenhua

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Protective Effects of a New Type Cover Gas on Molten Magnesium Alloy
Vol. 30, Issue 3, Pages: 282-284(2010)
Published： 2010 ，
DOI：

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[1]朱超,李培杰,李振华.新型保护气体在镁合金熔炼中的应用[J].特种铸造及有色合金,2010,30(03):282-284+195-196.

Zhu Chao, Li Peijie, Li Zhenhua. Protective Effects of a New Type Cover Gas on Molten Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 30(3):282-284(2010)
[1]朱超,李培杰,李振华.新型保护气体在镁合金熔炼中的应用[J].特种铸造及有色合金,2010,30(03):282-284+195-196. DOI：

Zhu Chao, Li Peijie, Li Zhenhua. Protective Effects of a New Type Cover Gas on Molten Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 30(3):282-284(2010) DOI：

摘要

系统研究了氟化酮（FKS）混合气体对镁合金熔体表面的保护作用。研究表明

氟化酮可有效地保护镁合金熔体。熔炼温度为640～700℃时

炉体密闭、气密性良好的条件下

0.006%的氟化酮（体积分数

下同）即可达到保护效果。在模拟压铸环境下

氟化酮约为0.01%时可达到保护效果。对试验中形成的保护膜进行研究

发现其主要成分是MgF2。SEM扫描分析发现

保护膜的厚度为30～50μm。

Abstract

Protective effects of FKS mixed cover gas on molten magnesium alloy were investigated systematically.The results illustrate that FKS can act well as protective gas during melting process.Desirable protective effects can be realized in the molten magnesium alloy with 0.006%FKS at 640

00 ℃ in condition of airtight furnace body with excellent airtightness.In additim

Better protective results can be obtained with 0.01% FKS concentration in a simulated die casting condition.Formed protective film is mainly composed of MgF2

and the thickness of the film is 30

0μm by SEM observation.