Rapid Investment Casting Titanium Alloy Impeller and Its Properties

Zong Xuewen; Liu Wenjie; Yang Xuedong; Xiong Cong; Ruan Jiayang; Zhang Jialiang

doi:10.15980/j.tzzz.2019.10.018

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Rapid Investment Casting Titanium Alloy Impeller and Its Properties
Vol. 39, Issue 10, Pages: 1106-1109(2019)
Published： 2019 ，
DOI： 10.15980/j.tzzz.2019.10.018

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[1]宗学文,刘文杰,杨学东,熊聪,阮佳阳,张佳亮.钛合金叶轮快速精铸工艺及其性能研究[J].特种铸造及有色合金,2019,39(10):1106-1109.

Zong Xuewen, Liu Wenjie, Yang Xuedong, et al. Rapid Investment Casting Titanium Alloy Impeller and Its Properties. [J]. Special Casting & Nonferrous Alloys 39(10):1106-1109(2019)
[1]宗学文,刘文杰,杨学东,熊聪,阮佳阳,张佳亮.钛合金叶轮快速精铸工艺及其性能研究[J].特种铸造及有色合金,2019,39(10):1106-1109. DOI： 10.15980/j.tzzz.2019.10.018.

Zong Xuewen, Liu Wenjie, Yang Xuedong, et al. Rapid Investment Casting Titanium Alloy Impeller and Its Properties. [J]. Special Casting & Nonferrous Alloys 39(10):1106-1109(2019) DOI： 10.15980/j.tzzz.2019.10.018.

摘要

复杂小型铸件因在离心铸造中离心半径小

致使铸件浇注过程中离心力小

充型效果不明显。以ZTC4合金铸件为研究对象

通过对铸件浇注系统的设计

研究了在该浇注系统下真空重力浇注的快速精密铸造件的力学性能。结果表明

采用激光烧结技术制备聚苯乙烯（PS）模

能大幅缩短研制周期

其粗糙度小于3.2μm;在真空度为4Pa时重力浇注叶轮铸件表面粗糙度小于6.3μm

X射线透视检验无缺陷。试棒屈服强度、抗拉强度和伸长率分别为为805.67MPa、922.67MPa和12.03%

观察金相组织为均匀魏氏组织形态。制备出了符合GB/T6614-2014标准的高等级精铸件。

Abstract

The centrifugal radius of complex and small castings presents minuscule in centrifugal casting

which can often result in small centrifugal force to fill inadequately The mechanical properties of ZTC4 Ti alloy castings by rapid investment casting with vacuum gravity pouring were analyzed on the basis of optimizing the gating system.The results reveal that Polystyrene（PS）wax pattern with roughness less than 3.2μm prepared by selective laser sintering（SLS）technology can shorten greatly the development cycle.Gravity pouring impeller with vacuum degree of 4 Pa has a surface roughness less than 6.3μm

and X-ray detection presents defect free.The yield strength

tensile strength and elongation of the samples reach 805.67 MPa

922.67 MPa and 12.03%

respectively.The metallographic observation indicates that the homogeneous Widmanstatten structure is distributed in the alloy

meeting high-grade casting conforming to GB/T6614-2014 standard.