Origination of Defects in Investment Casting Mold Shell

Lu Rui; Bao Yuqiu; Zhang Dawei; Qin Lei

doi:10.15980/j.tzzz.2012.03.029

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Origination of Defects in Investment Casting Mold Shell
Vol. 32, Issue 3, Pages: 262-263(2012)
Published： 2012 ，
DOI： 10.15980/j.tzzz.2012.03.029

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[1]鲁蕊,包玉秋,张大伟,秦磊.精密铸造型壳缺陷分析[J].特种铸造及有色合金,2012,32(03):262-263.

Lu Rui, Bao Yuqiu, Zhang Dawei, et al. Origination of Defects in Investment Casting Mold Shell. [J]. Special Casting & Nonferrous Alloys 32(3):262-263(2012)
[1]鲁蕊,包玉秋,张大伟,秦磊.精密铸造型壳缺陷分析[J].特种铸造及有色合金,2012,32(03):262-263. DOI： 10.15980/j.tzzz.2012.03.029.

Lu Rui, Bao Yuqiu, Zhang Dawei, et al. Origination of Defects in Investment Casting Mold Shell. [J]. Special Casting & Nonferrous Alloys 32(3):262-263(2012) DOI： 10.15980/j.tzzz.2012.03.029.

摘要

分析了精密铸造型壳的两种缺陷——"浆片"夹杂物、"型壳面层脱落"形成的原因。浆片夹杂物是因为蜡模之间配合处或浇注系统与蜡模之间存在缝隙形成的。型壳面层脱落是因为热膨胀导致结合面的结合不紧或组树不当造成的。这两种缺陷通过改变蜡模结构、组树方式、改变浇注方式等措施避免。

Abstract

Origination of slurry-plate inclusion and surface-layer exfoliation in investment casting mold shell was analyzed.Slurry-plate inclusion is closely related to the gap existed in the matching face

and surface-layer exfoliation is attributed to the un-fastened bonding of matching face resulted from the thermal expansion.Two defects can be eliminated by altering wax pattern structure

assembling ways and pouring ways.