Preparation of BaZrO<sub>3</sub> Shell-mould and Interactions between Titanium Alloys and BaZrO<sub>3</sub> Shell-mould

Wei Chao; Li Mingyang; Chen Guangyao; Wang Hongbin; Lu Xionggang; Li Chonghe

doi:10.15980/j.tzzz.2016.04.017

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Preparation of BaZrO₃ Shell-mould and Interactions between Titanium Alloys and BaZrO₃ Shell-mould
Vol. 36, Issue 4, Pages: 390-393(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.04.017

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[1]魏超,李明阳,陈光耀,汪宏斌,鲁雄刚,李重河.BaZrO_3基型壳制备及其与钛合金熔体的界面反应[J].特种铸造及有色合金,2016,36(04):390-393.

Wei Chao, Li Mingyang, Chen Guangyao, et al. Preparation of BaZrO₃ Shell-mould and Interactions between Titanium Alloys and BaZrO₃ Shell-mould. [J]. Special Casting & Nonferrous Alloys 36(4):390-393(2016)
[1]魏超,李明阳,陈光耀,汪宏斌,鲁雄刚,李重河.BaZrO_3基型壳制备及其与钛合金熔体的界面反应[J].特种铸造及有色合金,2016,36(04):390-393. DOI： 10.15980/j.tzzz.2016.04.017.

Wei Chao, Li Mingyang, Chen Guangyao, et al. Preparation of BaZrO₃ Shell-mould and Interactions between Titanium Alloys and BaZrO₃ Shell-mould. [J]. Special Casting & Nonferrous Alloys 36(4):390-393(2016) DOI： 10.15980/j.tzzz.2016.04.017.

摘要

使用新型耐火材料BaZrO3作为面层、以EC95作为背层制成钛合金精密铸造用复合型壳

型壳的面层浆料是由粗粉（-200+325目）和细粉（-325目）按照质量比为1∶1级配而成的BaZrO

经1 500℃下烧结4h

型壳表面光滑

没有明显裂纹。用光学显微镜和扫描电镜分析了BaZrO

与钛合金的界面反应

用显微硬度仪测出界面处的α硬化层厚度。结果表明

在钛合金熔体靠近型壳的界面处没有出现明显的反应层

不存在明显的元素扩散

但存在深度为60

0μm的硬化层。

Abstract

A BaZrO

-coated Al

shell-mould was prepared for the precision casting of titanium alloys.The mixed BaZrO

powder was added to the slurry of face layer

which was composed of 50%fine powder（-325mesh）and 50%fine powder（-200+325mesh）.After sintered for 4hours at 1 500℃

the inner surface of mould exhibits smooth with absence of obvious crack.After titanium alloys pouring

the interaction between BaZrO

and alloy was analyzed by OM and SEM.Theα-layer’s thickness near interface was measured by micro-hardness tester.The results reveal that apparent interaction and diffusion of elements in the interface can not be observed

while there exists someα-layer with about 60

0μm in thickness.