发明名称 |
HEAT EXCHANGER FOR HOT-WATER SUPPLY, WHICH IS PROMINENT IN RESISTANCE TO I-TYPE PITTING, AND MANUFACTURING METHOD OF THE SAME |
摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger for hot-water supply, which is prominent in resistance to I-type pitting and facilitated in working to obtain the heat exchanger for hot-water supply while permitting the shortening of a manufacturing process, and the manufacturing method of the same. SOLUTION: An Sn (tin) film, having the thickness of 0.5-3μm, is formed on the internal surface of a copper tube or a copper alloy tube for hot-water supply and the maximum temperature range upon brazing in a furnace is limited within 750-950 deg.C while heat treatment, retaining the temperature in the range for 1-10 min, is applied to provide a Cu-Sn alloy layer containing Sn by 7-23% on the internal surface of the copper tube or the copper alloy tube for hot-water supply with the range of thickness of 3μm or more and 50μm or less.
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申请公布号 |
JP2001165591(A) |
申请公布日期 |
2001.06.22 |
申请号 |
JP19990347200 |
申请日期 |
1999.12.07 |
申请人 |
SUMITOMO LIGHT METAL IND LTD |
发明人 |
YAMADA YUTAKA;SUZUKI SHINOBU |
分类号 |
B23K1/00;C23C30/00;C23F15/00;F28F19/06;(IPC1-7):F28F19/06 |
主分类号 |
B23K1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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