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Effect of titanium powder on the bond strength of metal heat treatment

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±è»çÇР( Kim Sa-Hak ) - °æµ¿´ëÇб³ Ä¡±â°øÇаú
±è¿íÅ ( Kim Wook-Tae ) - ½ÅÇÑ´ëÇб³ º¸°Ç°úÇдëÇÐ Ä¡À§»ýÇаú

Abstract

¸ñÀû: º» ¿¬±¸´Â º£¸±·ýÀÌ ÇÔÀ¯µÇÁö ¾ÊÀº ±Ý¼Ó-µµÀç¿ë(Ni-Cr)ÇÕ±Ý »êȭó¸® ½Ã µµÀç·Î ¾È¿¡ ƼŸ´½ ÆÄ¿ì´õ¸¦ È­ÇÐÀû Ã˸ŷΠÀÌ¿ëÇÏ¿© »êÈ­¸·À» ¾ïÁ¦ÇÏ°í, ±Ý¼Ó Ç¥¸é¿¡ Çü¼ºµÉ ºÒ¼ø¹°À» Á¦¾îÇÏ¿© µµÀçÀÇ °áÇÕ·ÂÀ» ÁõÁø½ÃÄÑ ÁÙ ¼ö ÀÖ´Â °¡´É¼ºÀ» ºÐ¼® ÇÏ°íÀÚ ÇÏ¿´´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: º£¸±·ýÀÌ ÇÔÀ¯µÇÁö ¾ÊÀº ±Ý¼Ó-µµÀç¿ë(Ni-Cr)ÇÕ±Ý »êȭó¸® ½Ã µµÀç·Î ¾È¿¡ ƼŸ´½À» È­ÇÐÀû Ã˸ŷΠÀÌ¿ëÇÏ¿´´Ù. ƼŸ´½ ÆÄ¿ì´õ¸¦ È­ÇÐÀû Ã˸ŷΠ»ç¿ëÇÏÁö ¾ÊÀº T1±ºÀ» ´ëÁ¶±ºÀ¸·Î ÇÏ°í, 10 g, 20 g ƼŸ´½ ÆÄ¿ì´õ¸¦ »ç¿ëÇÑ ½ÃÆíÀ» T2, T3±ºÀ¸·Î ºÐ·ùÇÏ¿© Àü´Ü°áÇÕ°­µµ¿Í °è¸éƯ¼º °üÂûÀ» À§ÇÏ¿© Á¦ÀÛ ÇÏ¿´´Ù. ÀÏ¿ø¹èÄ¡ ºÐ»êºÐ¼®(one-way ANOVA)Àº ±×·ìÀÇ Â÷À̸¦ °Ë»çÇϱâ À§Çؼ­ ½ÃÇàÇÏ¿´°í »çÈÄ °ËÁ¤(Tukey Honestly Significant Difference test)Àº ±×·ì°£ÀÇ Åë°èÀû ºÐ¼®À» À§ÇÏ¿© ¼öÇàµÇ¾ú´Ù.

°á°ú: ƼŸ´½ ÆÄ¿ì´õ¸¦ È­ÇÐÀû Ã˸ŷΠ»ç¿ë ÇÑ T3±ºÀÇ 3Á¡ ±ÁÈû °áÇÕ°­µµ¿Í »êÈ­¸· µÎ²²¸¦ ÃøÁ¤ÇÑ °á°ú, 39.22 ¡¾ 3.4 MPa¿Í 6.66 ¥ìm·Î °¡Àå ³ô°í, ¾ã°Ô ³ªÅ¸³µÀ¸¸ç, T2±ºÀº 34.65 ¡¾ 1.39 MPa°ú 13.22 ¥ìm, ƼŸ´½ È­ÇÐÀû Ã˸ŷΠ»ç¿ëÇÏÁö ¾ÊÀº ´ëÁ¶±º T1±ºÀº 32.37 ¡¾ 1.91 MPa°ú 22.22 ¥ìm ¼øÀ¸·Î ³ªÅ¸³µ´Ù.

°á·Ð: ½ÃÆíµéÀÇ °áÇÕ°­µµ¸¦ Åë°è ºÐ¼®ÇÑ °á°ú, ƼŸ´½ ÆÄ¿ì´õ¸¦ È­ÇÐÀû Ã˸ŷΠ»ç¿ëÇÑ ½ÇÇè T3, T2±ºÀÇ °áÇÕ·ÂÀÌ ³ô°Ô ³ªÅ¸³µ°í, »êÈ­¸· µÎ²² ¿ª½Ã ´ëÁ¶±º T1±º º¸´Ù ¾ã°Ô ³ªÅ¸³ª °ÍÀ¸·Î °áÇÕ·Â ÁõÁø¿¡ ¿µÇâÀ» ÁÙ ¼ö ÀÖÀ½ÀÌ °üÂû µÇ¾ú´Ù.

Purpose: Ni-Cr alloy does not contain Beryllium, causing the metal compound to form oxides in the furnace but by using Titanium as a chemical catalyst the forming of the oxides can be controlled, and by controlling the impurities formed on the metal surface, the possibility of the Ni-Cr alloy bond strength being increased can be analysed.

Materials and Methods: Titanium was used as a chemical catalyst in the porcelain for the oxidation of beryllium-free metal (Ni-Cr) alloy. The T1 group, which does not use Titanium power as a chemical catalyst is a reference model for comparison. The T2 group and T3 group used 10 g and 20 g of Titanium power, respectively. They are fabricated to observe the shear bond strength and surface properties. There was no significance when Oneway ANOVA analysis/Tukey Honestly Significant Difference Test was conducted for statistical analysis among groups (P > 0.05).

Results: Results of measuring the three-point flexural bond strength of the Ni-Cr alloy and thickness of the oxide film. Experiment T3 using 20 g Titanium chemical catalyst: 39.22 ¡¾ 3.41 MPa and 6.66 ¥ìm, having the highest bond strength and thinness of oxide film. Experiment T2 using 10 g Titanium chemical catalyst: 34.65 ¡¾ 1.39 MPa and 13.22 ¥ìm. Experiment T1 using no Titanium chemical catalyst: 32.37 ¡¾ 1.91 MPa and 22.22 ¥ìm.

Conclusion: The T2 and T3 experiments using Titanium chemical catalyst showed higher bond strength for the Ni-Cr alloy and lower thickness of oxide film than experiment T1, and the titanium catalyst being able to increase bond strength was observed.

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Beryllium; Titanium; chemical catalyst; oxide film; bond str

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