大型钛合金叶轮的铸造工艺研究

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[1]赵亮,高婷,杜宇,张恩平,常江.大型钛合金叶轮的铸造工艺研究[J].特种铸造及有色合金,2015,35(09):955-957.

Zhao Liang, Gao Ting, Du Yu, et al. Production of Large Titanium Alloy Impeller Castings[J]. Special Casting & Nonferrous Alloys, 2015,35(9):955-957.
[1]赵亮,高婷,杜宇,张恩平,常江.大型钛合金叶轮的铸造工艺研究[J].特种铸造及有色合金,2015,35(09):955-957. DOI： 10.15980/j.tzzz.2015.09.017.

Zhao Liang, Gao Ting, Du Yu, et al. Production of Large Titanium Alloy Impeller Castings[J]. Special Casting & Nonferrous Alloys, 2015,35(9):955-957. DOI： 10.15980/j.tzzz.2015.09.017.

针对复杂、大型、薄壁钛合金叶轮容易产生浇不足、冷隔、气缩孔、微裂纹等缺陷

进行了原因分析和工艺改进。采取机加工石墨型的工艺方法

通过顶注+底注式的离心铸造

成功浇注了质量为180kg、外形尺寸为1 200mm×300mm、壁厚为8mm的钛合金叶轮。在该铸件的试制过程中

当凝壳炉的熔炼电流大于20kA时

其电压必须控制在35

另外在石墨型表面喷涂ZrO2涂料后

降低铸件的表面粗糙度

同时降低了铸件表面的热裂倾向。

Some defects easily occurred in thin walled titanium alloy impeller

such as misrun

coldshut

gas porosity and micro-crack

were analyzed

and processing design was modified.Through adopting the machining graphite model

vertical gate system and centrifugal casting methods

titanium alloy impeller with 180 kg and1 200mm×300mm as well as the minimum wall thickness of 8mm was prepared successfully.In addition

during melting process

the melting voltage is controlled in 35

1V when the melting current is more than 20 kA.With spraying ZrO2 on the surface of the graphite mould

roughness of the impeller can be improved and hot crack tendency of surface is decreased.

钛合金叶轮石墨型离心铸造

Titanium AlloyImpellerGraphite MouldCentrifugal Casting

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