文章信息/Info

Title:

Investigation on Gravity Casting Process of Metallic Hollow Sphere Composites

文章編號:

1674—3962 (2024)05-0000-00

作者:

亓昌; 楊孟欣; 于晨; 崔麗萍; 楊姝

1.大連理工大學汽車工程學院 工業(yè)裝備結構分析國家重點實驗室，遼寧 大連 116024 2.大連理工大學 寧波研究院，浙江 寧波 315016

Author(s):

QI Chang; YANG Mengxin;  YU Chen; CUI Liping; YANG Shu

1.State Key Laboratory of Structural Analysis for Industrial Equipment，School of Automotive Engineering，Dalian University of Technology，Dalian 116024，China 2. Ningbo Research Institute，Dalian University of Technology，Ningbo 315016，China

關鍵詞:

金屬空心球復合材料; 重力鑄造; 模具設計; 鑄造工藝; 實驗驗證

Keywords:

hollow sphere reinforced composites; gravity casting; mold design; casting process; experimental verification

分類號:

TG146.21；TG249.3

DOI:

10.7502/j.issn.1674-3962.202205009

文獻標志碼:

A

摘要:

基于對金屬空心球復合材料的結構分析，采用金屬型重力鑄造法制備金屬空心球復合材料。介紹了金屬空心球復合材料金屬型重力鑄造工藝流程，并設計了一種成本低廉、簡易成型、且能多次使用的金屬型模具，且對金屬空心球復合材料進行了實驗試制及材料驗證。結果表明，采用金屬型重力鑄造法能夠制備出孔壁結構完整且孔洞隨機分布的金屬空心球復合材料，能實現(xiàn)空心球單一設計與梯度設計；金屬空心球復合材料基體與空心球壁組織較為致密，且形成了厚度為25～30 μm的界面層；金屬空心球復合材料的應力-應變曲線具有明顯的彈性階段、塑性平臺階段和致密化階段，且采用空心球梯度設計的金屬空心球復合材料相較于空心球單一設計的金屬空心球復合材料，其基本力學性能有明顯的提升。最后，與傳統(tǒng)的閉孔泡沫鋁材料進行了對比分析，金屬空心球復合材料整體穩(wěn)定性更高，吸能效果更強。

Abstract:

Based on the structural analysis of metal hollow sphere composites，metal hollow sphere composites were prepared by metal mold gravity casting. The technological process of metal mold gravity casting of metal hollow sphere composite is introduced，and a metal mold with low cost，simple molding and multiple use is designed. The experimental trial production and material verification of metal hollow sphere composite are carried out. The results show that the metal hollow sphere composite with complete pore wall structure and random distribution of pores can be prepared by metal mold gravity casting method, and the single design and gradient design of hollow spheres can be realized. The matrix and hole wall structure of metal hollow sphere composites are relatively dense，and the thickness is about 25～30 μm interface layer. The stress-strain curve of metal hollow sphere composite has obvious elastic stage，plastic plateau stage and densification stage，and the metal hollow sphere composite material designed with hollow sphere gradient has significantly improved its basic mechanical properties compared to the metal hollow sphere composite material designed with a single hollow sphere.Finally，compared with the traditional closed cell aluminum foam，the metal hollow spheres composite has higher overall stability and stronger energy absorption.