Effects of Ce on the Microtructure and Properties of 925Ag Alloy

Bo Hairui; Yuan Junping; Ma Chunyu

doi:10.15980/j.tzzz.2013.06.035

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Effects of Ce on the Microtructure and Properties of 925Ag Alloy
Vol. 33, Issue 6, Pages: 586-590(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.06.035

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[1]薄海瑞,袁军平,马春宇.Ce对925银组织和性能的影响[J].特种铸造及有色合金,2013,33(06):586-590.

Bo Hairui, Yuan Junping, Ma Chunyu. Effects of Ce on the Microtructure and Properties of 925Ag Alloy. [J]. Special Casting & Nonferrous Alloys 33(6):586-590(2013)
[1]薄海瑞,袁军平,马春宇.Ce对925银组织和性能的影响[J].特种铸造及有色合金,2013,33(06):586-590. DOI： 10.15980/j.tzzz.2013.06.035.

Bo Hairui, Yuan Junping, Ma Chunyu. Effects of Ce on the Microtructure and Properties of 925Ag Alloy. [J]. Special Casting & Nonferrous Alloys 33(6):586-590(2013) DOI： 10.15980/j.tzzz.2013.06.035.

摘要

采用金相分析、硬度测试、动电位极化技术、SEM、颜色分析等手段

研究了Ce对925银的铸造、冷加工、抗电化学腐蚀、抗氧化红斑变色和抗硫化变色等性能的影响。结果表明

Ce含量为0.05%的银合金晶粒较细

缩松和气孔倾向最小

硬度适中

抗电化学腐蚀、抗氧化和硫化变色性能最优

综合性能优良;Ce含量超过0.075%后

合金组织出现第二相

晶界偏析和缩松倾向增大

冷加工、抗电化学腐蚀、抗氧化和硫化变色性能恶化。

Abstract

Effects of Ce on microstructure and properties of as-cast

cold working

anti-electrochemical corrosion

anti-tarnishing of sulfuration and anti-oxidation of 925Ag silvers were investigated by means of optical microscopy

hardness testing

potentiadynarnic polarization

SEM （scanning electron microscopy） and color analysis. The results show that with 0.05% Ce addition

compact and fine grain structure in 925Ag alloys can be observed with the proper hardness and the minimum shrinkage porosity （holes）

and the desirable anti-electrochemical corrosion

anti-tarnishing and anti-oxidation performance can be obtained in the alloy. When adding more than 0.075% Ce

the cold working performance and properties of anti-electrochemical corrosion as well as anti-tarnishing are deteriorated as a result of the more occurrence of second phase

grain boundary segregation and the increase of shrinkage porosities.