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Effect of cooling rate control on the change in hardness of the multi-purpose Ag-Pd-Zn-In-Sn alloy during porcelain firing simulation and post-firing heat treatment

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½ÅÇýÁ¤ ( Shin Hye-Jung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±è¹ÎÁ¤ ( Kim Min-Jung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±Ç¿ëÈÆ ( Kwon Yong-Hoon ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±èÇüÀÏ ( Kim Hyung-Il ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
¼³È¿Á¤ ( Seol Hyo-Joung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç

Abstract

º» ¿¬±¸¿¡¼­´Â ¼Ò¼º ½Ã ³Ã°¢¼Óµµ¸¦ Á¶ÀýÇÏ´Â °Í°ú µ¿½Ã¿¡ ¼Ò¼º ÈÄ Ãß°¡ÀûÀÎ ÈÄ¿­Ã³¸®¸¦ ½ÃÇàÇÏ´Â °ÍÀÌ ÈÄ¿­Ã³¸®¸¦ ½ÃÇàÇÏÁö ¾Ê´Â °Íº¸´Ù ÇÕ±ÝÀÇ °æµµ »ó½Â¿¡ ´õ¿í È¿°úÀûÀÎÁö ¾Ë¾Æº¸°íÀÚ, ´Ù¸ñÀû¿ë Ag-Pd-Zn-In-Sn°è ÇÕ±ÝÀ» ÀÌ¿ëÇÏ¿© ¸ðÀǼҼº ½Ã ³Ã°¢¼ÓµµÀÇ Á¶ÀýÀÌ ¼Ò¼º ¹× ÈÄ¿­Ã³¸®¿¡ µû¸¥ ÇÕ±ÝÀÇ °æµµº¯È­¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¶»çÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. ´Ù¸ñÀû ¿ë Ag-Pd-Zn-In-Sn°è ÇÕ±ÝÀÇ ¸ðÀǼҼº ½Ã ³Ã°¢¼Óµµ¸¦ Á¶ÀýÇÔ¿¡ µû¶ó ÇÕ±ÝÀÇ ¿¬È­°¡ ¾ïÁ¦µÇ¾ú´Ù. Stage 0(4´Ü°èÀÇ ³Ã°¢¼Óµµ Áß °¡Àå ºü¸¥ ¼Óµµ; ¼Ò¼º·Î è¹ö°¡ ¼Ò¼º Á¾·á Áï½Ã Àüü°¡ ¿­¸° »óÅ·Π³Ã°¢µÇ´Â ´Ü°è)À¸·Î ³Ã°¢¼Óµµ¸¦ Á¶ÀýÇÏ¿© ÇÕ±ÝÀ» ¼Ò¼ºÇÑ °æ¿ì, ¸ðÀǼҼº °úÁ¤¿¡¼­ ÇÕ±ÝÀÌ ¿¬È­µÇ¾úÀ¸¸ç, ÀûÀýÇÑ ½Ã°£µ¿¾ÈÀÇ ÈÄ¿­Ã³¸®°¡ °æµµ»ó½Â¿¡ È¿°úÀûÀ̾ú´Ù. Stage 3(4´Ü°èÀÇ ³Ã°¢¼Óµµ Áß °¡Àå ´À¸° ¼Óµµ; ¼Ò¼º·Î è¹ö°¡ ¼Ò¼º¿Ï·á ÈÄ ´ÝÇôÁø »óÅ·Π³Ã°¢µÇ´Â »óÅÂ)À¸·Î ³Ã°¢¼Óµµ¸¦ Á¶ÀýÇÏ¿© ÇÕ±ÝÀ» ¼Ò¼ºÇÑ °æ¿ì, ¸ðÀǼҼº °úÁ¤¿¡¼­ ÇÕ±ÝÀÌ ¿¬È­µÇÁö ¾Ê¾ÒÀ¸¸ç, Ãß°¡ÀûÀÎ ÈÄ¿­Ã³¸®´Â ÇÕ±ÝÀÇ °æµµ¸¦ ÇÏ°­½ÃÄ×´Ù. Stage 0À¸·Î ¸ðÀǼҼº µÈ Çձݿ¡¼­ 30ºÐ°£ÀÇ ÈÄ¿­Ã³¸®¿¡ ÀÇÇØ °æµµ°¡ Å©°Ô »ó½ÂÇÑ ¿øÀÎÀº ¼Ò¼º¿¡ ÀÇÇØ ±âÁö ³»·Î °í¿ëµÇ¾ú´ø ¼®Ãâ¹°ÀÌ ´Ù½Ã ±âÁö ¹ÛÀ¸·Î È°¹ßÇÏ°Ô ¼®ÃâµÈ °Í¿¡ ±âÀÎÇÏ¿´´Ù. Stage 3À¸·Î ¸ðÀǼҼº µÈ Çձݿ¡¼­´Â ÈÄ¿­Ã³¸®¿¡ ÀÇÇØ ¼®Ãâ¹°ÀÌ ±âÁö ³»·Î ´Ù½Ã °í¿ëµÇ¾ú°í, »õ·Î¿î ¼®Ãâ»óÀÇ »ý¼ºÀÌ ¹Ì¹ÌÇÏ¿© ÈÄ¿­Ã³¸®°¡ °æµµ »ó½Â¿¡ ±â¿©ÇÏÁö ¸øÇÏ¿´´Ù.

In this study, the effect of cooling rate control on the change in hardness of the multi-purpose Ag-Pd-Zn-In-Sn alloy during porcelain firing simulation and post-firing heat treatment was investigated, and the following results were obtained. Softening of the multi-purpose Ag-Pd-Zn-In-Sn alloy during porcelain firing simulation was suppressed by controlling the cooling rate. When the cooling rate was adjusted to stage 0(firing chamber moves immediately to upper end position), the alloy was softened during porcelain firing simulation, and the hardness was greatly increased by the additional post-firing heat treatment. When the cooling rate was adjusted to stage 3(firing chamber remains closed), the alloy was not softened even after porcelain firing simulation, and the hardness was apparently lowered by the additional post-firing heat treatment. The apparent increase in hardness in the post-firing heat treated alloy after porcelain firing simulation at cooling rate of stage 0 attributed to the active precipitation. The apparent decrease in hardness in the post-firing heat treated alloy after porcelain firing simulation at cooling rate of stage 3 attributed to the fact that the precipitates were solutionized into the matrix by the post-firing heat treatment.

Å°¿öµå

Ag-Pd-Zn-In-Sn°è ´Ù¸ñÀû¿ë ÇÕ±Ý; ¸ðÀǼҼº; ³Ã°¢¼Óµµ; ÈÄ¿­Ã³¸®
Multi-purpose Ag-Pd-Zn-In-Sn alloy; porcelain firing simulation; cooling rate; post-firing heat treatment

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