フジコー技報−tsukuru No. ᛛⴚ⸃⺑㩷਻ᎺᎿᬺᄢቇᄢቇ㒮Ꮏቇ⎇ⓥ㒮
‛⾰Ꮏቇ⎇ⓥ♽ᢎ᝼ടᎿ↪㜞ࠢࡠࡓ㋕ว㊄ߩ૞⵾ᴺߣߘߩ⠴㘩ᕈᎿቇඳ჻ ᕺ⦟⑲ೣ㩷 㩷 㩷 㩷 㩷 㩷 㩷 *KFGPQTK'TC

Fabrication Method and Corrosion Resistance of High
Chromium Iron Alloy for Forming Application㧝㧚ߪߓ߼ߦ㋕ߩ⠴㘩ᕈ߿㜞᷷ߦ߅ߌࠆ⠴㉄ൻᕈߪ‫ޔ‬Cr ߩᷝടߦࠃߞߡะ਄ߔࠆߎߣߪࠃߊ⍮ࠄࠇߡ޿ࠆ‫߃଀ޕ‬

2000ppm ࠍ⿧߃ࠆỚᐲ߹ߢ⪺ߒߊჇടߒߚ‫ޕ‬ṁ⸃ߦߪ㜞಴ജߩ࡟࡯ࠩ࡯ࠍ↪޿ߚ‫࡯ࠩ࡯࡟ޕ‬ṁ⸃ߩᮨᑼ࿑ࠍ Fig. 1 ߦ␜ߔ‫ޕ‬߫‫ޔ‬㧥㨪㧝㧞㧑ߩ Cr ࠍᷝടߒߚ㍑ߪἫജ⊒㔚ࡊ࡜ࡦ࠻ߩ㜞᷷⠴ᾲㇱ᧚ߣߒߡ૶ࠊࠇߡ޿ࠆ‫ߥߒ߆ߒޕ‬߇ࠄ‫ޔ‬Fe㧙Cr ว㊄ߦ߅޿ߡ Cr ㊂ࠍჇടߐߖࠆߣ
ၮᧄ⊛ߦߪ㕢ᕈ߿ടᎿᕈࠍ៊ߥ޿ᯏ᪾⊛ᕈ⾰ߩഠൻࠍ᜗ߊ(1)‫ޔߪ⽎⃻ߩߎޕ‬ว㊄ਛߦ߅ߌࠆࠬࡇࡁ࡯࠳࡞ಽ⸃ߦࠃࠆ⚵❱ᄌൻ޽ࠆ޿ߪǻ⋧ߩᒻᚑߦࠃࠆ⣀ൻ⃻⽎ߣ㑐ଥߒߡ޿ࠆߣ⸒ࠊࠇߡ޿ࠆ(2)‫৻ޕ‬ᣇ‫ޔ‬㜞⚐ᐲ㊄ዻࠍ૶↪ߔࠇ߫‫ޔ‬ᑧᕈߣ㕢ᕈ߇៊ߥࠊࠇࠆߎߣߥߊ‫ޔ‬ടᎿᕈࠍઃਈߔࠆߎߣ߇ߢ߈ࠆ(3)-(6)‫ߒޕ‬߆ߒߥ߇ࠄ‫⵾ߩߘޔ‬ㅧߦ߅޿ߡߪ‫ޔ‬ਇ⚐‛ߩᷙ౉ࠍᭂജ㒐ߋᚻᲑ߇ᔅⷐߣߥࠆ‫ޔ߫߃଀ޕ‬ว㊄ࠍᶋㆆߐߖߡလႂߣߩធ⸅ࠍᛥ߃‫ޔ‬ṁ⸃࡮ಝ࿕ߐߖࠆߎߣ߇ߢ߈ࠆࠦ࡯࡞࠼ࠢ࡞࡯ࠪࡉἹߩ೑↪ߥߤ․ᱶߥᣇ
ᴺ߇ᔅⷐߢ޽ࠆ‫ᧄޕ‬Ⓜߢߪ‫ޔ‬Ყセ⊛◲නߥᣇᴺߦࠃ

Fig.1 Schematic illustration of laser meltingࠅṁ⸃࡮ಝ࿕ߐߖߚ㜞ࠢࡠࡓ㋕ว㊄ߩടᎿᕈߣ⠴㘩ᕈߦߟ޿ߡᬌ⸛ࠍⴕߞߚߩߢߘߩ⚿ᨐࠍ⚫੺ߐߖߡ㗂ߊ‫ޕ‬㧞㧚㜞ࠢࡠࡓ㋕ว㊄ߩ૞⵾ᣇᴺ ṁ⸃ߔࠆߚ߼ߩේᢱߣߒߡ‫ޔ‬㜞⚐ᐲࠢࡠࡓߣ㜞⚐ᐲ㋕ߩ☳ᧃࠍ↪ᗧߒߚ‫߇࠭ࠗࠨ߽ᧃ☳ߩࠇߕ޿ޕ‬100Ǵm એਅ‫ޔ‬ਇ⚐‛Ớᐲߪᢙ 10ppm ޽ࠆ޿ߪߘࠇએਅߢ޽ࠆ߇‫߇࠭ࠗࠨߩᧃ☳ޔ‬ዊߐ޿ߚ߼⴫㕙Ⓧ߇⋧ኻ⊛ߦᄢ߈ߊ㉄⚛Ớᐲ߇㜞ߊߥߞߡ޿ߚ㧔Cr☳ᧃ㧦96ppmO‫ޔ‬Fe ☳ᧃ㧦483ppmO㧕‫☳ࠄࠇߎޕ‬ᧃࠍࠕ࠻࡜ࠗ࠲࡯ࠍ↪޿ߡ㊀㊂Ყ߇ 1㧦1 ߦߥࠆࠃ߁ߦᷙวߒߚ㧔Fe-50mass%Cr㧕‫ޕ‬ਇᵴᕈࠟࠬ㔓࿐

Fig.2 Photos showing process through (a) to (d) to᳇ਛߢᷙวߒߚ߇‫ޔ‬ᷙว☳ᧃߩ㉄⚛Ớᐲ߇obtain alloy plate6 ࠬ࠹ࡦ࡟ࠬ㍑⵾ߩኈེߦࠕ࡞ࠧࡦዉ౉ญࠍ⸳ߌ‫ޔ‬㧟㧚㜞ࠢࡠࡓ㋕ว㊄ߩᒝᐲߣᑧᕈࠕ࡞ࠧࡦࡈࡠ࡯ਛߢṁ⸃ࠍⴕߞߚ‫ޕ‬ṁ⸃ߪ࡟࡯ࠩ࡯ ߹ߕ‫ޔ‬㜞ࠢࡠࡓ㋕ว㊄ߩᯏ᪾⊛ᕈ⾰ࠍ⺞ߴࠆߚ߼‫ޔ‬ࠍ৻ᣇะߦ⿛ᩏߐߖ‫ޔ‬ᕆㅦടᾲ‫ޔ‬ᕆㅦ಄ළࠍⴕ޿᫔࿶❗⹜㛎ࠍⴕߞߚ‫⹜ޕ‬㛎⁁ߩว㊄ࠍᓧߚ‫ޕ‬Fig. 2 ߦ࡟࡯ࠩ࡯ṁ⸃ᓟߩ౮⌀ࠍ⁁⹜ᢱߣߒߚ‫ߩߎޔߚ߹ޕ‬ว㊄ࠍ੍߼ᾲಣℂࠍⴕߞ␜ߔ‫ޕ‬ṁ⸃ಝ࿕ߒߚว㊄ߪߘߩේᢱߢ޽ࠆ☳ᧃߢ࿐ߚ⹜ᢱߦߟ޿ߡ߽࿶❗⹜㛎ࠍⴕߞߚ‫ޕ‬Fig. 4 ߦ࿶❗

߹ࠇߡ߅ࠅ‫ޔ‬ਇ⚐‛ߩᷙ౉ߪㆱߌࠄࠇߡ޿ࠆߣ⠨߃⹜㛎ߩ⚿ᨐࠍ⌀ᔕജ㨪⌀߭ߕߺᦛ✢ߣߒߡ⴫ߒߡ

ࠄࠇࠆ㧔Fig. 2(a)㧕‫ࠍࠇߎޕ‬ขࠅ಴ߒߚߣ߈ߩᄖⷰ

޿ࠆ‫ޕ‬ࠨࠗ࠭ߪǾ3 x 5 ߩ౞ᩇ߇ Fig. 2(b)ߢ޽ࠆ‫ޕ‬਄ߩ౮⌀ߪ⴫஥‫ޔ‬ਅߩ౮⌀ߪⵣ஥ߩᄖⷰߢ޽ࠆ‫ޕ‬ṁ⸃ಝ࿕ߒߚว㊄ߦᧂṁⲢ߹ߚߪඨṁⲢߩ☳ᧃ߇ઃ⌕ߒߡ޿ࠆ‫ࠍᧃ☳ߩࠄࠇߎޕ‬ขࠅ෰ߞߚᓟߩᄖⷰ߇ Fig. 2 (c)ߢ޽ࠆ‫࡜ࡈޔߡߒߘޕ‬ࠗࠬടᎿߦࠃࠅ᧼⁁ߩว㊄ࠍᓧࠆߎߣ߇ߢ߈ࠆ
㧔Fig. 2 (d)㧕‫ߩߎޕ‬ว㊄᧼ߩ⚵ᚑࠍ EPMA ߦࠃࠅ⺞ߴߚ‫⚿ߩߘޕ‬ᨐࠍ Fig. 3 ߦ␜ߔ‫ޕ‬෻኿㔚ሶ௝㧔(Fig.
3(a))ߢࠦࡦ࠻࡜ࠬ࠻ߩ⧯ᐓ⇣ߥࠆ㗔ၞ߇ⷰኤߐࠇ
ࠆ߇‫⚿ࠇߙࠇߘߪࠄࠇߎޔ‬᥏☸ߢ޽ࠆ‫ߩߘޕ‬Ⴚ⇇߇⚿᥏☸⇇ߢ޽ࠅ‫⚿ޔ‬᥏☸ A ߣ⚿᥏☸ B ߩ EPMA ಽᨆ ⚿ ᨐ (Fig.3 ߩ ฝ ਅ ) ߆ ࠄ ᒰ ೋ ⋡ ⊛ ߩ ⚵ ᚑFig. 4 True stress – true strain curves obtained

㧔Fe-50mass%Cr㧕ࠍว㊄ߣߒߡ߶߷଻ߞߡ޿ࠆߎ

by compression testߣ߇ࠊ߆ࠆ‫ޔߚ߹ޕ‬Fig. 3(b)ߣ(c)ߩ Fe ߣ Cr ߩ․
ᕈ X ✢௝߆ࠄࠊ߆ࠆࠃ߁ߦ‫ޔ‬Fe ߣ Cr ߪဋ৻ߦᷙ ࿶❗ᒝᐲߪ 600㨪800MPa ߹ߢᄌൻߒߡ޿ࠆ߇‫ޔ‬ߑߞߡ޿ࠆߎߣ߇␜ߐࠇߚ‫ߦ߁ࠃߩߎޕ‬ㆡᒰߥࠨࠗ

ṁ⸃߹߹᧚ߢ߽ߞߣ߽㜞޿ᒝᐲࠍ␜ߒߚ‫ߢߎߎޕ‬ᵈ࠭ߩ☳ᧃࠍ૶↪ߒ‫ޔ‬ᕆㅦടᾲߣᕆㅦ಄ළࠍⴕ߁ߎߣ⋡ߐࠇࠆߎߣߪ‫⹜ߩࠇߕ޿ޔ‬㛎ߦࠃߞߡ‫ޔ‬ว㊄ൻ߇น⢻ߢ޽ࠆߎߣ߇ࠊ߆ࠆ‫߆ߒޕ‬ߩ߭ߕߺ▸࿐߹ߢ࿶❗ᄌᒻ߇น⢻ߢ޽ࠅ‫ࡓࡠࠢޔ‬㊂ߒ‫ޔ‬ᓟߦㅀߴࠆࠃ߁ߦ㉄⚛߇ᄙ㊂ߦᷙ౉ߒߡ߅ࠅ‫ޔ‬߇ 50mass%ߣ㜞ߊߡ߽⎕უߔࠆߎߣߥߊᄌᒻߢ߈

ߎߩ㉄⚛߇⻉․ᕈߦᄢ߈ߥᓇ㗀ࠍ෸߷ߔ߆ࠍᬌ⸛ࠆߎߣߢ޽ࠆ‫ޕ‬ߦ߅޿ߡ߽߆ߥࠅ

ߒߥߌࠇ߫ߥࠄߥ޿‫ޕ‬

Fig. 3 EPMA showing (a) BSE image, (b) Fe-K

7x-ray image,(c) Cr-K x-ray image, and result ofFig. 5 Stress-strain curves obtained by tensile

chemical analysis (right bottom)

testフジコー技報−tsukuru No.  Fig. 5 ߪᒁᒛ⹜㛎ߩ⚿ᨐߢ޽ࠆ‫ޕ‬Ყセߩߚ߼‫ޔ‬᳢߅޿ߡ‫⚿ޔ‬᥏ A ߣ⚿᥏ B ߇ⷰኤߐࠇࠆ߇‫ߩߘޔ‬Ⴚ↪⊛ߥࡈࠚ࡜ࠗ࠻♽ࠬ࠹ࡦ࡟ࠬ㍑㧔JIS: SUS430㧕

⇇ߪ⋥✢⁁ߢ޽ࠆ‫⚿ޕ‬᥏ A ߣ⚿᥏ B ߩ೙㒢ⷞ㊁࿁ߩ⚿ᨐ߽␜ߒߡ޿ࠆ‫ޕ‬㜞ࠢࡠࡓ㋕ว㊄ߦߪ‫ޔ‬ṁ⸃߹᛬௝㧔SAD㧕ࠍ Fig. 7(b)ߣ(c)ߦ␜ߔ‫ߣߪࠄࠇߎޕ‬߹᧚ߩ߶߆‫ޔ‬ᾲಣℂࠍⴕߞߚ߽ߩ‫ߦࠄߐޔ‬಄㑆࿶ᑧ

߽ߦ{㧝㧝㧟}㕙߆ࠄߩ࿑ᒻߢ޽ࠆ߇㕙ౝ࿁ォࠍ઻ߞߒߚᓟߦᾲಣℂࠍⴕߞߚ߽ߩߩ㧟⒳㘃ࠍᒁᒛ⹜㛎ߡ޿ࠆ‫⚿ߩࠄࠇߎޕ‬᥏ߩ౒ㅢゲߪާ㧝㧝㧝ިߢ޽ࠅ‫ޔ‬ߦଏߒߚ‫⹜ޔ߅ߥޕ‬㛎 ࠨࠗ࠭ߦߟ޿ߡߪᐔⴕㇱ㐳ߘߒߡߎࠇࠄߩ⚿᥏ߪ{㧝㧝㧞}㕙ߢធߒߡ޿ࠆ㧔Fig.

ߐࠍ 10mm ߣߒ‫࠼࠶ࡋࠬࡠࠢޔ‬ㅦᐲࠍ 10mm/min7(d)㧕‫ޕ‬એ਄ߩ⸃ᨆ⚿ᨐ߆ࠄ‫ޔ‬Fig. 6 ߩ㤥޿✢⁁⚵❱ߣߒߡᒁᒛ⹜㛎ࠍⴕߞߚ‫ޕ‬ṁ⸃߹߹᧚ߪ‫ޔ‬ᔕജ㨪߭ߪᄌᒻ෺᥏ߢ޽ࠅ‫ޔ‬ᄌᒻೋᦼߦ⃻ࠇࠆ࠮࡟࡯࡚ࠪࡦߕߺᦛ✢ߦ࠮࡟࡯࡚ࠪࡦ߇⃻ࠇᣧᦼߦ⎕ᢿߒߡ޿ߪ෺᥏ᄌᒻ‫ߜࠊߥߔޔ‬ਇဋ৻ᄌᒻߦၮߠߊߣ⚿⺰ߐࠆ‫ޕ‬ṁ⸃ಝ࿕ߩᓟ‫৻ޔ‬ᣤ‫ޔ‬⍴ᤨ㑆ߩᾲಣℂ㧔1000͠ࠇࠆ‫ޔࠄ߇ߥߒ߆ߒޕ‬࿶ᑧ὾㊰ࠍⴕ߁ߣ࠮࡟࡯࡚ࠪ

x10min㧕ࠍᣉߔߣ‫ޔ‬ᄌᒻೋᦼߦ࠮࡟࡯࡚ࠪࡦ߇⃻ࡦߪᶖᄬߒ㧔Fig. 5㧕‫ޔ‬ㅢᏱߩォ૏ߩ⊒↢ߣჇᱺߦࠃࠇࠆ߇‫ޔ‬ᄌᒻᓟᦼߦߪṖࠄ߆ߥᦛ✢ߣߥࠅㅢᏱߩᄌ

ࠆᄌᒻߩߺߣߥࠆ‫ޕ‬Fig. 8 ߦ࿶ᑧ὾㊰ࠍⴕߞߚ㜞ࠢ

ᒻㆊ⒟ࠍㄡߞߡ޿ࠆ߽ߩߣᕁࠊࠇࠆ‫ޕ‬⍴ᤨ㑆ߩᾲಣࡠࡓ㋕ว㊄ߩ⚵❱ࠍ␜ߔ‫⚿ޕ‬᥏☸ߪ╬ゲ☸ߢߘߩࠨℂᓟ‫ޔ‬಄㑆࿶ᑧ㧔࿶ਅ₸㧦60%㧕ࠍⴕ޿‫ߦࠄߐޔ‬὾

ࠗ࠭ߪ 50Ǵm ೨ᓟߢ޽ࠆ‫ߢߎߎޕ‬ᵈ⋡ߐࠇࠆߩߪ‫ޔ‬㊰㧔1000͠x10min㧕ࠍⴕߞߚ⹜ᢱߢߪ‫ࠪ࡯࡟࠮ޔ‬㤥޿ὐ⁁ߩࠦࡦ࠻࡜ࠬ࠻ߢ޽ࠆ‫ᧄޕ‬ว㊄ߪ㉄⚛Ớᐲ࡚ࡦߪᶖᄬߒ‫ޔ‬ᒝᐲߣિ߮߇ะ਄ߔࠆ‫ߢߎߎޕ‬ᵈ⋡߇㜞޿ߎߣ߆ࠄ‫㉄ߪߚ߹࡞࡯ࡎ࡯ࡠࡉޔ‬ൻ‛ߣᕁࠊߐࠇࠆߎߣߪ‫ޔ‬SUS430 ࠬ࠹ࡦ࡟ࠬ㍑ࠃࠅᒢᕈ₸ࠇࠆ߇‫ޔ‬ዋߥߊߣ߽ᑧᕈࠍ៊ߥ߁ߎߣߪߥ޿‫ޕ‬㧔ࡗࡦࠣ₸㧕߇㜞ߊ‫ޔ‬೰ᕈ߇ᄢ߈ߊߥߞߡ޿ࠆߎߣ
ߢ޽ࠆ‫ޕ‬

Fig. 6 Cross-sectional microstructure of alloy
sheet cold rolled by 5% ࠮࡟࡯࡚ࠪࡦ಴⃻ߩࡔࠞ࠾࠭ࡓࠍ⺞ߴࠆߚ߼‫⚵ޔ‬❱ⷰኤࠍⴕߞߚ‫ޕ‬Fig. 6 ߪ‫ޔ‬ṁ⸃߹߹᧚ࠍ⍴ᤨ㑆ᾲಣℂߒߡ‫ޔ‬಄㑆࿶ᑧ㧔࿶ਅ₸㧦5%㧕ࠍⴕߞߚߣ߈ߩశቇ㗼ᓸ㏜⚵❱ߢ޽ࠆ‫ޕ‬૗ᧄ߽ߩ⋥✢⊛ߥ㤥޿✢߇ⷰኤߐࠇࠆ߇‫ߩ✢ߩࠄࠇߎޔ‬ᄙߊߪ࿶ਅᣇะߦኻ
ߒߡ 45q೨ᓟߩ௑߈ߢ޽ࠅ‫ࠎߖޔ‬ᢿᔕജᦨᄢߩᣇ

Fig. 7 (a) Bright field image, (b) SAD from grainะߣ৻⥌ߒߡ޿ࠆ‫ޕ‬Fig. 7 ߪ‫ߡߒ⋡⌕ߦ❱⚵⁁✢ޔ‬A, (c) SAD from grain B,and (d) indexed results of᠟ߞߚㅘㆊ㔚㗼௝ߢ޽ࠆ‫ޕ‬᣿ⷞ㊁௝㧔Fig. 7(a)㧕ߦalloy cold rolled by 5%8

ߪ SUS430‫ޔ‬SUS304‫ޔ‬Fe-Cr ว㊄ߩ㗅ߦૐߊߥߞߡ޿ࠆ‫ޔߜࠊߥߔޕ‬ᓥ᧪ߩࠬ࠹ࡦ࡟ࠬ㍑㧔SUS304‫ޔ‬
SUS430㧕ߦᲧߴߡ‫ޔ‬⠴㘩ᕈ߇ఝࠇߡ޿ࠆߎߣ߇␜ໂߐࠇࠆ‫ޕ‬
Fig. 8 Microstructure of alloy sheet cold rolledand annealed㧠㜞ࠢࡠࡓ㋕ว㊄ߩ⠴㘩ᕈ㩷 ⠴㘩ᕈ⹏ଔߩߚ߼ߦ಄㑆࿶ᑧࠍⴕߞߡ᧼⁁⹜ᢱߣ

Fig. 10 Polarization curves of as㧙 cold rolledߒߚ‫ޕ‬Fig. 9 ߪ⍴ౠ⁁ߩ⹜ᢱࠍ࿶ਅ₸ 60㧑ߢ಄㑆(left) and subsequently annealed (right) alloys࿶ᑧࠍᣉߒߚ⹜ᢱߩᄖⷰ౮⌀ߢ޽ࠆ‫ޔߦ߁ࠃߩߎޕ‬ᧄว㊄ߪ಄㑆࿶ᑧน⢻ߢ޽ࠅ‫ޔ‬90㧑એ਄ߩ࿶ᑧ߽น
⢻ߢ޽ࠆ‫ޕ‬⠴㘩ᕈ⹏ଔߩ⹜ᢱߣߒߡ‫ޔ‬಄㑆࿶ᑧ߹߹ߣߎࠇࠍ὾㊰㧔1000͠10min㧕ߒߚ㧞⒳㘃ߩ⹜ᢱࠍḰ஻ߒߚ‫ޕ‬

Fig. 11 Polarization curves of as 㧙 cold rolled(left) and subsequently annealed (right) alloys.
 Fig. 11 ߪႮ㉄᳓ṁᶧਛߦ߅ߌࠆ㓁ᭂಽᭂ᷹ቯߩ
⚿ᨐߢ޽ࠆ‫ߩߎޕ‬႐ว߽‫㉄⎫ޔ‬᳓ṁᶧߣห᭽‫ޔ‬࿶ᑧ߹߹㧔Ꮐ࿑㧕ߣ὾㊰ߒߚ߽ߩ㧔ฝ࿑㧕ߢ‫ߤࠎߣ߶ޔ‬หߓ᜼േࠍ␜ߒߡ޿ࠆ‫ޔߚ߹ޕ‬ਇേᘒൻ㔚૏㧔Ep㧕
Fig. 9 Photograph of specimen before (left) and߽ Fe-Cr ว㊄߇߽ߞߣ߽ૐߊ‫ޔ‬ਇേᘒ⛽ᜬ㔚ᵹኒᐲ

after (right) cold rolling㧔ip㧕߽ Fe-Cr ว㊄߇߽ߞߣ߽ૐ޿‫ߢߎߎޕ‬ᵈ⋡ߐࠇࠆߎߣߪ‫ޔ‬ᓥ᧪ߩࠬ࠹ࡦ࡟ࠬ㍑ߦᲧߴߡ‫ޔ‬Fe-Cr9

 Fig. 10 ߪ⎫㉄᳓ṁᶧਛߦ߅ߌࠆ㓁ᭂಽᭂᦛ✢ߢ

ว㊄ߪㆊਇേᘒ߳ㆫ⒖ߔࠆ߹ߢߩࡐ࠹ࡦࠪࡖ࡞߇

޽ࠆ‫ޕ‬࿶ᑧ߹߹㧔Ꮐ࿑㧕ߣ὾㊰ߒߚ⹜ᢱ㧔ฝ࿑㧕ߢᄢ߈ߊ‫ޔ‬ਇേᘒ⊹⤑߇ᐢ޿ࡐ࠹ࡦࠪࡖ࡞▸࿐ߢ቟ቯߪ‫ߤࠎߣ߶ޔ‬หߓ᜼േࠍ␜ߒߡ޿ࠆ‫ޕ‬ਇേᘒൻ㔚૏ߢ޽ࠆߎߣࠍ␜ߒߡ޿ࠆ‫ޕ‬

㧔Ep㧕ߪ‫ޔ‬SUS304‫ޔ‬SUS430‫ޔ‬Fe-Cr ว㊄ߩ㗅ߦ એ਄ߩࠃ߁ߦ‫ޔ‬㓁ᭂಽᭂ᷹ቯ߆ࠄ Fe-Cr ว㊄ߩ⠴ૐߊߥߞߡ߅ࠅ‫ޔߚ߹ޔ‬ਇേᘒ⛽ᜬ㔚ᵹኒᐲ㧔ip㧕㘩ᕈߪ㕖Ᏹߦఝࠇߡ޿ࠆߎߣ߇␜ໂߐࠇߚ‫ࠍࠇߎޕ‬フジコー技報−tsukuru No. ⏕⹺ߔࠆߚ߼‫ޔ‬Ⴎ᳓ྃ㔵⹜㛎㧔JIS Z 2137㧕ࠍⴕߞෳ⠨ᢥ₂ߚ‫ޕ‬Ⴎ᳓ߪ 5%NaCl ᳓ṁᶧࠍ૶↪ߒߚ‫ޕ‬Fig. 12 ߦ1) D.J. Maykuth, R.J. Jaffee: Ductile Chromium⹜㛎㐿ᆎ߆ࠄ 1000 ᤨ㑆ᓟߩว㊄ߩᄖⷰࠍ␜ߔ‫ޕ‬㐳

and Its Alloys, (ASM, Materials Park, Ohio,ᤨ㑆ߩ࠹ࠬ࠻ߦ᜔߽ࠊࠄߕ⣣㘩↢ᚑ‛ߪోߊ⹺߼1955) p. 229

ࠄࠇߕ‫⹜ޔ‬㛎೨ߣ߶ߣࠎߤหߓశᴛࠍ␜ߒߚ‫ߩߎޕ‬2) W.C. Leslie: The Physical Metallurgy of Steels,ࠃ߁ߦᧄว㊄ߩ⠴㘩ᕈߪᓥ᧪ߩࠬ࠹ࡦ࡟ࠬ㍑ߣᲧ

(McGraw-Hill, New York, 1981) pp. 337-340.

ߴߡ㕖Ᏹߦఝࠇߡ޿ࠆߎߣ߇ࠊ߆ࠆ‫ޕ‬3) K. Abiko: Ultra High Purity Base Metals,
Proceedings

oftheFirstInternational

Conference on Ultra-High Purity Base Metals(UHPM-1994), ed. by K. Abiko, K. Hirokawa, S.
Takaki, (The Japan Institute of Metals, Sendai,1995) pp. 522-523.
4) Y.Kato, T. Ujiro, S. Satoh, K. Yamato, K. Abiko:J. Physique IV 5 (1995), C7-403-407.
(5) H. Takaku, S. Kato, J. Tani, K. Abiko: J.

Fig. 12㩷Appearance of Fe-Cr alloy sheet after

salt spray test for 1000 hrs

Physique IV 5 (1995), C7-397-402.
(6) T. Yokota, S. Satoh, Y. Kato, K. Abiko: Phys.
Stat. Sol. (a) 167 (1998), 495-502.

㩷㧡߅ࠊࠅߦ㩷 ౨㗡ߦㅀߴߚࠃ߁ߦ‫ޔ‬%T Ớᐲߩ㜞޿ (G%T ว㊄ߪ⣀޿ߣ޿߁ᰳὐ߇޽ߞߚ߇‫ޔ‬ว㊄ਛߩਇ⚐‛ࠍᭂജᛥ߃ࠆߎߣߦࠃߞߡ‫ޔ‬ടᎿน⢻ߥว㊄ߣߥࠆߎߣ߇⍮ࠄࠇߡ޿ߚ‫╩ޕ‬⠪ߪ‫ޔ‬㐳ᐕ‫ޔ‬⠴㘩ᕈṁ኿⊹⤑ߩ⎇ⓥߦ៤ࠊߞߡ߈ߡ‫ߩߘޔ‬ㅜਛߢṁ኿⊹⤑ߣࡃ࡞ࠢ᧚ߩ⠴㘩ᕈࠍᲧセߔࠆߚ߼ߦ࡟࡯ࠩ࡯ṁ⸃ಝ࿕ࠍⴕߞߡ᧼᧚ࠍ૞⵾ߒߚ߽ߩߢ޽ࠆ‫⚿ߩߘޕ‬ᨐ‫ߣ⚛㉄ޔ‬޿߁ਇ⚐‛ߩỚᐲ߇㜞ߊߡ߽಄㑆࿶ᑧߩࠃ߁ߥടᎿ߇ߢ߈ࠆߎߣࠍ⷗಴ߒߚ‫ᧄޕ‬ว㊄ߪ‫ߩ⚛㉄ޔ‬ᓇ㗀ࠍ߶ߣࠎߤฃߌߥ޿ߎߣ߆ࠄ‫ޔ‬ᄢ᳇ਛߢߩᾲ㑆࿶ᑧ߿ᾲ㑆㎊ㅧࠍ߽น⢻ߢ޽ࠈ߁‫ޔߚ߹ޕ‬ᒁᒛ߿࿶❗ᄌᒻ‫ޔ‬಄㑆࿶ᑧߥߤቶ᷷ߢߩ႟ᕈᄌᒻ߽ⴕ߃ࠆߎߣ߆ࠄ‫ޔ‬ା㗬ᕈߩ㜞޿㜞⠴㘩ᕈߩㇱຠࠍ႟ᕈടᎿߢ㊂↥ߢ߈ࠆน⢻ᕈࠍ߽ߞߡ޿ࠆߣ⠨߃ߡ޿ࠆ‫ޕ‬ ᧄ⎇ⓥߦ౒หߢ៤ࠊߞߡ㗂޿ߚቇ↢⻉᳁‫⎇ޔ‬ⓥ⠪‫ޔ‬ળ␠ߩᣇ‫ߦޘ‬ෘߊ߅␞ࠍ↳ߒ਄ߍࠆ‫ᧄޔߚ߹ޕ‬ว㊄ࠍ⚫੺ߔࠆᯏળࠍਈ߃ߡ㗂޿ߚ ᩣ ࡈࠫࠦ࡯ߩᣇ‫ߦޘ‬ᗵ⻢ߩᗧࠍ⴫ߒߚ޿‫ ޕ‬10