Microstructure and Mechanical Properties of QSn6.5-0.1 Strip Billet in Horizontal Continuous Casting

Lu Junpan

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Microstructure and Mechanical Properties of QSn6.5-0.1 Strip Billet in Horizontal Continuous Casting
Issue 3, Pages: 57-59(2003)
Published： 2003 ，
DOI：

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[1]路俊攀,,,,,,,,,,张胜华,覃业霞.水平连铸带坯QSn6.5-0.1的组织与性能[J].特种铸造及有色合金,2003(03):57-59+0.

Lu Junpan. Microstructure and Mechanical Properties of QSn6.5-0.1 Strip Billet in Horizontal Continuous Casting. [J]. Special Casting & Nonferrous Alloys (3):57-59(2003)
[1]路俊攀,,,,,,,,,,张胜华,覃业霞.水平连铸带坯QSn6.5-0.1的组织与性能[J].特种铸造及有色合金,2003(03):57-59+0. DOI：

Lu Junpan. Microstructure and Mechanical Properties of QSn6.5-0.1 Strip Billet in Horizontal Continuous Casting. [J]. Special Casting & Nonferrous Alloys (3):57-59(2003) DOI：

摘要

讨论了锡磷青铜QSn6.5 0 .1水平连铸带坯的宏观组织特点、反偏析行为和显微缩孔。结果表明 :横断面以柱状晶为主

结晶中心线普遍上移

大面出现结晶角

上下表面和侧边出现反偏析

紧临偏析区出现低Sn区

显微缩松是主要组织缺陷

是冷加工报废的主要原因

同时通过热处理试验

分析了热处理规范对锭坯性能及组织的影响

并制订出合理的热处理规范

Abstract

Macro-structural features

inverse-segregation behavior and micro-shrinkage porosity of QSn6.5-0.1（Sn-P-Brone） strip billet in horizontal continuous casting were discussed. The results showed that column crystal dominated in transverse cross section; crystalline central line moved to top generally; crystalline angle was formed in main face; and inverse-segregation occurred in top

bottom surfaces and sides. Low tin zone appeared in the adjacency to segregation. The rejected castings presented during machining attributed to micro-shrinkage porosity.The effects of heat treatment on microstructures and mechanical properties were analyzed.Also rational heat treatment norm was built.