|Table of Contents|

Analysis of casting defect mechanism and optimization of solidification temperature field(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2020年03期
Page:
83-89
Research Field:
工艺与材料
Publishing date:

Info

Title:
Analysis of casting defect mechanism and optimization of solidification temperature field
Author(s):
WANG Yu;  WU Xiaoming;  REN Xinmiao;  GAO Huaisheng
(Xi’an Space Engine Company Limited, Xi’an 710100, China)
Keywords:
loosening defect;  casting process optimization;  solidification temperature field
PACS:
V261
DOI:
-
Abstract:
Aiming at the loosening defect of Y inlet pipe of a certain type of engine, its produce mechanism was expounded, and the visual model of alloy filling and solidification was established based on procast casting simulation software, as result it is found that unreasonable design of chilled iron is the main reson which causes such problem. By adjusting the structure and size of the chilled iron, coordinating the cooling rate of each part, optimizing the distribution of the solidification temperature field, a bottom-up solidification sequence was established to ensure the smoothness of the molten liquid feeding channel, and the alloy liquid of the original defect was replenished to eliminate looseness defect. The results of small batch production verification show that there was no loose defect in the X-ray inspection of the casting, the casting qualification was increased from 60% to 92.8%, and the manufacturing cycle was shortened form four months to one month

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Last Update: 2020-06-25