Forming and Quality of K418B Large Thin-walled Parts Based on Similarity Theory and Model Test

Ding Xue; Wu Donghui

doi:10.15980/j.tzzz.2022.03.022

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Forming and Quality of K418B Large Thin-walled Parts Based on Similarity Theory and Model Test
Vol. 42, Issue 3, Pages: 384-390(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.03.022

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Ding Xue, Wu Donghui. Forming and Quality of K418B Large Thin-walled Parts Based on Similarity Theory and Model Test. [J]. Special Casting & Nonferrous Alloys 42(3):384-390(2022)
DOI：

Ding Xue, Wu Donghui. Forming and Quality of K418B Large Thin-walled Parts Based on Similarity Theory and Model Test. [J]. Special Casting & Nonferrous Alloys 42(3):384-390(2022) DOI： 10.15980/j.tzzz.2022.03.022.

摘要

为实现利用比例模型来预测高温合金大型薄壁件的成形过程及内部品质的目的，采用物理相似的方法设计了比例模型并验证了其有效性。采用数值模拟和熔模铸造试验研究了高温合金大型薄壁件的流动性、凝固过程和内部品质。结果表明，比例模型可以充分反映原高温合金大型薄壁件的成形过程及内部品质，高温合金大型薄壁构件中筋条和无缝隙浇道连接的光滑薄壁处的充填凝固特性相同，且充填凝固速度均大于凸台的充填凝固速度，但充填凝固趋势相同。这表明相似理论与数值模拟及实际试验相结合可有效指导高温合金大型薄壁铸件的熔模铸造生产，有效降低其研制成本、提高成品率。

Abstract

In order to utilize the scale model to predict the forming process and internal quality of large thin-walled parts

a scale model was designed based on similarity theory and the effectiveness was verified. Numerical simulation and investment casting experiments were conducted to investigate the filling

solidification

hot tendency and internal quality of large thin-walled superalloy parts. The results indicate that the scale model can fully reflect the forming process and internal quality of the original large thin-walled superalloy parts

where the filling and solidification properties of the smooth thin wall connected by steel bar and seamless gate are identical. Moreover

the filling and solidification velocity is higher than that of the convex

while the trend in common. Therefore

it is proved that the combination of similarity theory

numerical simulation and actual experiment can effectively guide the production of large thin-walled superalloy parts

effectively reducing the development costs and improving yield rate.