Smelting and Casting Features of HSn70-1B Alloy for Condenser Coil

Guo Shumei  Wang Yongchao  Liu Yuemei

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Smelting and Casting Features of HSn70-1B Alloy for Condenser Coil
Issue 4, Pages: 68-69(2004)
Published： 2004 ，
DOI：

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[1]郭淑梅,,,,,,,,,王永朝,,,,,,,,,刘月梅.加B冷凝管合金HSn70-1B熔铸特点[J].特种铸造及有色合金,2004(04):68-69+80.

Guo Shumei Wang Yongchao Liu Yuemei. Smelting and Casting Features of HSn70-1B Alloy for Condenser Coil. [J]. Special Casting & Nonferrous Alloys (4):68-69(2004)
[1]郭淑梅,,,,,,,,,王永朝,,,,,,,,,刘月梅.加B冷凝管合金HSn70-1B熔铸特点[J].特种铸造及有色合金,2004(04):68-69+80. DOI：

Guo Shumei Wang Yongchao Liu Yuemei. Smelting and Casting Features of HSn70-1B Alloy for Condenser Coil. [J]. Special Casting & Nonferrous Alloys (4):68-69(2004) DOI：

摘要

熔体中B的损失主要在加B后的合金化过程

其次是铸造时熔体的保温过程

在工艺上加强脱氧和覆盖

可以比较合理地控制B含量 ;在保温铸造过程中B有向表面迁移聚集的倾向 ;w（B） =0 .0 13 %时

对铸态组织有明显细化作用

高倍组织发现针状相和块状相

B含量较低时

未发现针状相

块状相经电子探针X射线扫描分析

是一种含有合金元素As和其他杂质的富B化合物

熔体对硅砂炉衬侵蚀严重。

Abstract

B loss in melt mainly occures in B addition followed by alloying process

next at melt holding during smelting and pouring.The B content can be rationally controled with enhancing deoxidation and coverage.B trends towards surface coagulation at melt holding during pouring. w （B） =0.013% can refine greatly as cast microstructure

with occurence of needle like and block like phase in high magification while no needle like phases occur in lower B content.It is founded that the block like phase consits of a rich in B coumpound with As and other inpurities by DEX.Melt strongly erodes silica sand lining.