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发明公开
CN103146955A 198℃保险丝熔断芯的无铅低温合金及其制备方法 有权

198℃保险丝熔断芯的无铅低温合金及其制备方法
摘要：
本发明涉及一种198℃保险丝熔断芯的无铅低温合金及其制备方法，其原料构成及其重量百分比范围分别为：Cu：0.4%-0.6%；Ag:1.8%-2.2%；In:7.5%-8.5%；Bi:0.6%-0.8%；Sn：余量；其制备方法的步骤是：将金属锡加热，待锡熔化后，在280-320℃下，加入金属铜，待熔清后，再加入金属银，银熔清后，再加入铋、铟，熔清后进行常规的加入脱气剂脱气、除渣，浇铸成型。本发明涉及的含Ｓn、Cu、In、Ag、Bi的无铅低温合金，熔点为198±3℃；该种低温合金为共晶合金，具有成分均匀，熔点范围窄，成本低等特点，且为无铅环保材料，本身具有很好的社会效益及经济效益。
摘要（英）：

The invention relates to a 198-DEG C lead-free low-temperature alloy for a fuse burned-out core and a preparation method thereof. The 185-DEG C lead-free low-temperature alloy comprises the following raw materials in percentage by weight: 0.4%-0.6% of Cu, 1.8%-2.2% of Ag, 7.5%-8.5% of In, 0.6%-0.8% of Bi and the balance being Sn. The preparation method of the 198-DEG C lead-free low-temperature alloy comprises the following preparation steps of: heating metal tin; adding metal copper at 280-320 DEG C when tin is molten; adding metal silver after the metal copper is molten down; adding bismuth and indium after the metal sliver is molten down; conventionally adding a degassing agent for degassing after bismuth and indium are molten down; and removing the slag and casting. The lead-free low-temperature alloy containing Sn, Cu, In Ag and Bi disclosed by the invention has a melting point being 198 DEG C +/-3 DEG C. The low-temperature alloy is eutectic alloy which has the characteristics of good composition uniformity, narrow melting point range, low cost and the like and is a lead-free environment-friendly material. Moreover, the 198-DEG C lead-free low-temperature alloy has good social benefits and economic benefits.

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