フジコー技報−tsukuru No. ᢏ⾡ゎㄝ㻌ᮦᩱ」ྜᏛ࠿ࡽࡳࡓ⪏ᦶ⪖ᛶᮦᩱࡢ⤌⧊Consideration of Wear Resistant Material fromthe Point of View of Composite Theory㸯㸬ࡣࡌࡵ࡟஑ᕞ኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲㝔ᮦᩱᕤᏛ㒊㛛ᩍᤵ༤ኈ䠄ᕤᏛ䠅㻌 ᐑཎ ᗈ㑳㻌 㻌 㻌 㻌 㻌 㻌 㻌 +LURIXPL0L\DKDUD

ࡏࡓࣁ࢖ࢫ⣔࣮ࣟࣝࡀ◊✲㛤Ⓨࡉࢀࠊ࣐ࣝࢸࣥࢧ࢖

ᅽᘏࢆ┠ⓗ࡜ࡋࡓ࣮ࣟࣝᮦࡣࠊ㗰ᮦࢆ㧗ရ㉁࠿ࡘ

ࢺᇶᆅ࡟㸰ḟⅣ໬≀ࡀᚤ⣽࡟ศᕸࡋࡓᇶᆅ⤌⧊࡬㧗⢭ᗘ࡛ຍᕤᡂᙧࡉࡏࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚㛤Ⓨࡉไᚚࡍࡿࡇ࡜࡟ࡼࡾᙉᗘࠊ⪏ᦶ⪖ᛶࠊ⪏⇕ᛶࢆවࡡࢀ࡚ࡁࡓࡀ 1,2)ࠊࡑࢀࡣ⾲㠃ࢆⓑ㖧㒊㸦ࢳࣝ㒊㸧ࠊෆഛ࠼ࡓ㧗ရ㉁࣮ࣟࣝࡀ〇㐀ࡉࢀ࡚࠸ࡿࠋࡇࡇ࡛ࡣࠊ㒊ࢆࢿࢬ࣑㖧㒊࡟ไᚚࡋࡓࢳࣝࢻ࣮ࣟࣝ࡟ጞࡲࡾࠊ࣮ࣟࣝᮦࢆጞࡵ࡜ࡍࡿ⪏ᦶ⪖ᛶᮦᩱ࡟ࡘ࠸࡚࣐ࢺ〇㐀ࣉࣟࢭࢫ㛤Ⓨ࡜ඹ࡟ᵓᡂ⤌⧊ࡶ኱ࡁࡃኚ໬ࡋࣜࢵࢡࢫ┦㸦ẕ┦㸧࡜ᙉ໬┦㸦◳㉁ศᩓ┦㸧ࡢ」ྜ

࡚ࡁࡓ㸦Fig.1㸧ࠋࢢࣞࣥ㗪㕲࣮ࣟࣝࡣࢳࣝࢻ࣮ࣟࣝ⤌⧊ࢆࠊ㧗ྜ㔠㗪㕲ࡸࢭ࣑ࣛࢵࢡࢫศᩓ࢔࣑ࣝࢽ࢘ࡀᣢࡘඹᬗࢭ࣓ࣥࢱ࢖ࢺ࡜ᇶᆅ⤌⧊࡟∦≧㯮㖄ࢆ࣒ྜ㔠➼ࡢ⤌⧊ࢆ⏝࠸࡚ྛᵓᡂ┦ࡢຠᯝࡸᙺ๭࡟ศᩓࡉࡏࡓ⤌⧊ࢆᣢࡘ㗪㕲⣔࣮ࣟࣝᮦ࡛࠶ࡾࠊࡉࡽࡘ࠸࡚⤌⧊Ꮫⓗ࡟᳨ウࡋ࡚ࡳࡓࠋ࡟㧗ྜ㔠ࢢࣞࣥ㗪㕲㸦ࢽࣁ࣮ࢻ㗪㕲㸧⤌⧊ࡣ 4㹼
8%Ni ࢆྵࡳ࣐ࣝࢸࣥࢧ࢖ࢺᇶᆅ࡟ᨵ㉁ࡋࡓࡶࡢ࡛

㸰㸬」ྜ๎

࠶ࡿࠋࡲࡓ⌫≧㯮㖄ࢆศᕸࡉࡏࡓࢲࢡࢱ࢖࣮ࣝࣟࣝ

 」ྜᮦᩱࡢタィ࡟࠾࠸࡚ࠊ」ྜ໬ࣉࣟࢭࢫ࡜ඹ࡟

ࡶ⏝࠸ࡽࢀࠊࡇࡢࡼ࠺࡞࣮ࣟࣝࡣ㯮㖄࡟ࡼࡿᅽᘏ᫬」ྜᚋࡢᛶ㉁ࡢண

ࡢ⫙Ⲩࢀྥୖ࠾ࡼࡧ↝௜㜵Ṇࢆ┠ⓗ࡜ࡋࡓ⤌⧊タ࡜ࡋ࡚ Fig.2(a)࡟♧ࡍࣔࢹࣝ࡟ࡼࡿᘬᙇᙉࡉࢆ⪃࠼ィ࡜⪃࠼ࡽࢀࡿࠋ

ࡿ࡜ࠊFig.3 ࡟♧ࡍࡼ࠺࡟ᙉ໬┦ࡀ◚᩿ࡉࢀ࡞࠸ṍࡣ㔜せ࡛࠶ࡿࠋ᭱ࡶ༢⣧࡞ᙧ≧ࡢ㡿ᇦ࡛ࡣ㔠ᒓ㸦Ȫ1*㸧࡜ᙉ໬┦㸦Ȫ2㸧࠿ࡽணࡉࢀࡿ≉ᛶࡢྥୖࡀᮇᚅࡉࢀࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊ࣐ࢺࣜࢵࢡࢫ㔠ᒓࡣ኱ࡁࡃṍࡴࡇ࡜࡟ᑐࡋࠊᙉ໬┦༢⊂࡛ࡣ኱ࡁ࡞ṍ࡟⪏࠼ࡽࢀࡎࠊᑠࡉ࡞ṍ࡛◚᩿ࡍࡿࡇ࡜࠿ࡽࠊ◚᩿ᚋࡢᘬᙇᙉࡉࡣ Fig.3(b)ࡢ㔠ᒓ༢యࡢᙉࡉ㸦Ȫ1㸧࠿ࡽࡶప࠸್࡜࡞ࡿࠋ

Fig.1 Development of roll materials.
୍᪉ࠊ࢔ࢲ࣐࢖ࢺ࣮ࣟࣝᮦࡣ㗪㗰࡜㗪㕲ࡢ୰㛫ࡢ⤌⧊࡛ࠊ㧗Ⅳ⣲࣮࢜ࢫࢸࢼ࢖ࢺ⏕ᆅ࡟ඹᬗࢭ࣓ࣥࢱ࢖
ࢺࡀศᩓࡋࡓ⤌⧊ࢆ᭷ࡋ࡚࠾ࡾࠊࡑࡢᚋࠊᙉ࠸ⓑ㖧໬ഴྥࢆ᭷ࡍࡿ Cr ࡢῧຍ࡟ࡼࡾ M3CࠊM7C3 ࠊ
M23C6 ➼ࡢⅣ໬≀ࢆศᕸࡉࡏࡓ㧗ࢡ࣒ࣟ㗪㕲 3)ࠊࡉࡽ࡟ 1980 ᖺᚋ༙࡟ࡣࠊϭA ᒓඖ⣲㸦WࠊMo ➼㸧ࠊϬA ᒓඖ⣲㸦V ➼㸧ࡢ MC㸪M2C Ⅳ໬≀ 4)ࢆศᕸࡉ

Fig.2 Array of hard phase,(a)parallel-type㸪(b)series-type㸪(c)short-fiber-type6

Table 1 ߦ␜ߔࠃ߁ߦ⋥✢߹ߚߪᦛ✢ߢะ਄ߔࠆߎߣ߇ᄙ޿‫ޔ߅ߥޕ‬ታ㓙ߩ⚵❱ߪ Fig.2(c)ߩࠃ߁ߦᒝ
ൻ⋧ߪ⍴❫⛽⁁߹ߚߪ☸ሶ⁁ߢಽᏓߔࠆߎߣ߇৻⥸⊛ߢ޽ࠆߩߢ‫ⶄߩߘޔ‬วೣߪ Table 2 ߦ␜ߐࠇࠆᑼߣߥࠅ‫․ޔ‬ᕈᡷༀ߳ߩᒝൻ⋧ߩലᨐߩ⷗Ⓧ߽ࠅࠍૐߊ⸳ቯߔࠆᔅⷐ߇޽ࠆ‫ޔߚ߹ޕ‬࿶❗ᒝߐ߿⎬ߐߦ㑐ߒߡ߽ࡑ࠻࡝࠶ࠢࠬว㊄ߩ․ᕈߦᓇ㗀ߐࠇࠆߎFig.3 Stress-strain curve of matrix, hard
phase and composites(a), and maximum
stress of composites before and after
breakdown(b).

ߣ߇੍ᗐߐࠇ‫ޔ‬ㆡᱜߥផ᷹߇㊀ⷐߣ⠨߃ࠄࠇࠆ‫ޕ‬㧟㧚ᒝൻ⋧ߩ․ᕈะ਄ ࡠ࡯࡞᧚⚵❱ࠍ᭴ᚑߔࠆ὇ൻ‛ߩ⒳㘃ߣߒߡߪ‫ޔ‬

Table1 Simple mixture rule of stress, young’s
modulus and thermal expansion between
metal and ceramics.

߹ߣ߼ࠄࠇߚႎ๔߇޽ࠆ߇‫ ߫߃଀ޔ‬Fig.4 ߦ␜ߐࠇࠆࠃ߁ߦ C ߣ⚿วജߩᒝ޿ర⚛ߣߩ⚵ߺวࠊߖ߇
ᄙߊ‫ࠆࠇߐ⸘⸳ߢ࡞࡯ࡠ♽ࠬࠗࡂߦ․ޔ‬ర⚛ߪ╙
IVA ᣖ㨪VIA ᣖ߇ᄙ޿ 5)‫ޕ‬ᒝൻ⋧ߪ MC ߿ M2C ဳߩ㜞޿⎬ߐࠍᜬߟ὇ൻ‛⋧ࠍⓍᭂ⊛ߦ↪޿ࠆ߇‫ޔ‬Fig.
4㧔⭯Ἧ⦡㧕ߦ␜ߔࠃ߁ߦ MC ὇ൻ‛ߩ⎬ߐ߇Ყセ⊛㜞ߊ‫ ߡ޿⛯ޔ‬M2C㧔Ἧ⦡㧕‫ߩઁߩߘޔ‬᭴ㅧ㧔ỚἯ⦡㧕ߩ㗅ߢૐߊߥߞߡ޿ࠆ‫ޔ߅ߥޕ‬὇ൻ‛ߛߌߢߪߥߊ‫ޔ‬὇⓸ൻ‛ࠍ↪޿ߡᡷༀࠍ⹜ߺߚႎ๔߽޽ࠆ 6)‫ޕ‬

Table 2 Estimation of stress and Young’s
modulus of fibrous hard phase reinforced
metal matrix composites.

Fig.4 Vickers hardness of carbides.
 MC ὇ൻ‛ߩᒻ⁁ߪ☸⁁߿⧎ᑯ⁁ߩ߽ߩ߇ᄙߊ
ߺࠄࠇࠆ߇‫ޔ‬M7C3 ߥߤߪᾲᵹᣇะߦᚑ㐳ߒߚ᧼⁁ߩ߽ߩ߽ᄙ޿‫ޕ‬὇ൻ‛߇⁛┙ߦಽᏓߔࠆ߆ࡀ࠶࠻ࡢ
࡯ࠢ਄ߦಽᏓߔࠆ߆ߦࠃࠅࡑ࠻࡝࠶ࠢࠬ߳ߩᔕജ

7Fig.3 ߪᒝൻ⋧ߩ૕ⓍഀวߩჇടߦኻߒߡ‫ᦨޔ‬ᄢᒁવ㆐߇⇣ߥࠆߚ߼‫ޔ‬࿶❗ᒝᐲ߿⠴៺⠻ᕈߦᓇ㗀ࠍ෸ᒛᒝߐ߇⋥✢⊛ߦะ਄ߒߡ޿ࠆ߇‫ࠇࠄ޿↪ߦ⥸৻ޔ‬߷ߔߣ⠨߃ࠄࠇࠆ‫៺ࠅ߇ࠈߎߪ࡞࡯ࡠߦ⥸৻ޕ‬⠻ࠍࠆⶄว᧚ᢱ㧔Fig.2(a),(b)㧕ߩ․ᕈߦ㑐ߔࠆⶄวೣߪ‫ޔ‬ਥߣߒߡฃߌࠆߣ⠨߃ࠄࠇࠆ߇‫៺ࡉࠪ࠶࡟ࡉࠕޔ‬⠻フジコー技報−tsukuru No. ߦኻߔࠆ࠮࡜ࡒ࠶ࠢࠬ㈩೉ߩᓇ㗀ߦߟ޿ߡႎ๔ߐ޿ߡ឵▚ߒߚ‫ޕ‬1200K ㄭற߇߶߷ࡑ࡞࠹ࡦࠨࠗ࠻

ࠇߡ߅ࠅ 7)‫ޔ‬Fig.5 ߦ␜ߔࠃ߁ߦ‫ޔ‬ㅪ⛯ࠕ࡞ࡒ࠽❫ߦߥߞߡ޿ࠆߩߦኻߒ‫ޔ‬1373K ㄭற߆ࠄߩ὾౉ࠇ⛽ࠍ៺ᡂ㕙ߦኻߒߡု⋥ࠃࠅ߽߿߿௑޿ߚ❫⛽ᣇ

ߢߪ 50㨪90%ߪᱷ⇐ࠝ࡯ࠬ࠹࠽ࠗ࠻߇ಽᏓߒߡ޿ะ߇ᦨ߽ᛶ᛫ജ߇㜞޿ߣߐࠇߡ޿ࠆ‫ᦨޕ‬ㆡߥ⠴៺⠻

ࠆ Fig.7 ߪ Fig.6 ߩ(A)߅ࠃ߮(B)⹜ᢱߦߟ޿ߡ㧞࿁․ᕈࠍᓧࠆߚ߼ߦߪ‫⴫ޔ‬㕙ߦ߅ߌࠆ៺ᡂ߿ᔕജಽᏓ

ߩ὾ᚯߒಣℂࠍⴕߞߚ㓙ߩ⎬ߐߣࡑ࡞࠹ࡦࠨࠗ࠻

ࠍ⸃ᨆߒ‫ޔ‬὇ൻ‛ߩ㈩೉߇น⢻ߢ޽ࠇ߫೙ᓮߔࠆᔅ

㊂ߩᄌൻߦߟ޿ߡ␜ߒߚ߽ߩߢ޽ࠆ߇‫ޔ‬㜞ว㊄㍌㋕ⷐ߇޽ࠆߣ⠨߃ࠄࠇࠆ‫ޕ‬ߩ႐วߪ὾౉ࠇߢࡑ࡞࠹ࡦࠨࠗ࠻⋧ߣߔࠆࠃࠅߪ
ೋ࿁ߪᱷ⇐ࠝ࡯ࠬ࠹࠽ࠗ࠻⋧ߣߒ‫ⶄޔ‬ᢙ࿁ߩᾲಣℂ
ߦࠃࠅࡑ࡞࠹ࡦࠨࠗ࠻ߣ㧞ᰴ὇ൻ‛ߩᷙว⚵❱ߦ೙ᓮߔࠆߎߣߦࠃࠅࠃࠅ㜞޿⎬ߐࠍᓧߡ޿ࠆ‫ޕ‬

Fig.6 Influence of quenching temperature on
the matrix microstructure for Fe- 1.7㨪2.3%C5%Cr- 5%Mo- 5%V alloy.

Fig.5 Influence of orientation of alumina fiberonwear
resistanceofalumina/Al-4.43mass%Cu alloy composite. Fibers aredistributed parallel of sliding direction fromleft to right in sample (a).
㧠㧚ࡑ࠻࡝࠶ࠢࠬ⋧ߩ․ᕈะ਄ ࡑ࠻࡝࠶ࠢࠬ⋧ߪ Fig.3 ߦ߽␜ߒߚࠃ߁ߦ‫ޔ‬ᒝൻ⋧ߩ૕Ⓧഀว߇ૐ޿႐วߪⶄว᧚ᢱో૕ߩ․ᕈߦ
ᄢ߈ߊᓇ㗀ߔࠆߣ⠨߃ࠄࠇࠆ‫޿߅ߦ࡞࡯ࡠ࠼࡞࠴ޕ‬ߡ߽ߔߢߦࡌࠗ࠽ࠗ࠻߹ߚߪࡑ࡞࠹ࡦࠨࠗ࠻ၮ࿾
ߦ೙ᓮߐࠇߡ߅ࠅ‫ⶄ߽ߢ࡞࡯ࡠ♽ࠬࠗࡂޔ‬ᢙ࿁ߩ὾౉ࠇ὾ᚯߒಣℂࠍⴕ߁ߎߣߦࠃࠅࡑ࡞࠹ࡦࠨࠗ࠻⚵❱ߦ⺞ᢛߔࠆߎߣ߇৻⥸⊛ߣߥߞߡ޿ࠆ‫ޕ‬Fig.6
ߪ Fe-1.7㨪2.3%C-5%Cr-5%Mo-5%V ว㊄ߩ὾౉ࠇಣℂߦ߅ߌࠆࡑ࡞࠹ࡦࠨࠗ࠻ഀวࠍ␜ߒߚ߽ߩߢ

Fig.7 Vickers hardness and ratio ofmartensite at several tempering temperature,(A) and (B) are quenched sample of Fig. 6.

޽ࠆ 6)‫߅ߥޕ‬ഀวߪో૕߆ࠄᱷ⇐ࠝ࡯ࠬ࠹࠽ࠗ࠻ᒁ
8 ᾲಣℂߦࠃࠆࡑ࠻࡝࠶ࠢࠬ⋧ߩ⚵❱೙ᓮߣߒߡ㧡㧚ⶄว᧚ᢱߩ∋ഭ․ᕈ

ߪ‫ޔ‬㧞ᰴ὇ൻ‛ߛߌߢߥߊ‫ޔ‬N ᷝടߦࠃࠆᡷༀ߽⹜ ⶄว᧚ᢱߦ߅޿ߡ‫ޔ‬Fig.4 ߩࠃ߁ߦᒁᒛࠅߥߤߩߺࠄࠇߡ߅ࠅ‫ޔ‬N ߩᷝടߪ C ߣห᭽ߦࡑ࠻࡝࠶ࠢ㕒⊛⎕უ⹜㛎ࠍⴕ߁႐ว‫ޔ‬ᒝൻ⋧ߣࡑ࠻࡝࠶ࠢࠬ⋧ࠬߩ⎬ߐ߿⚵❱ߦᓇ㗀ࠍ෸߷ߔߎߣ‫ޔ‬Fig.8 ߦ␜ߔߩ⇇㕙ᒝᐲ߇ᒙ޿ߣ߈ߦߪᦨᒙㇱߣߥࠆᒝൻ⋧⇇ࠃ߁ߦ‫❱⚵ࠬࠢ࠶࡝࠻ࡑޔ‬ౝߦ߅ߌࠆ㧞ᰴൻว‛ߣ㕙㧔߹ߚߪ㤥㋦㧕߆ࠄ߈ⵚ߇↢ᚑߒߡߒ߹߁‫߆ߒޕ‬ߺࠄࠇࠆ⓸ൻ‛ߩಽᏓߦࠃࠅࠊߕ߆ߢߪ޽ࠆ߇ᡷߒߥ߇ࠄ‫ޔ‬ಾᰳ߈∋ഭ․ᕈߩࠃ߁ߦᦨᒙㇱߣߪ㑐ଥༀലᨐ߽⷗ࠄࠇߡ޿ࠆ 6)‫ޔߚ߹ޕ‬Al-Si-Cu ว㊄⹜ᢱߥ޿േ⊛⎕უ߇↢ߕࠆ႐วߪᒝൻ⋧ߪዋߒᄌࠊߞ

ߢߪ޽ࠆ߇‫ޔ‬ᾲಣℂ߅ࠃ߮಄ළਛߦ߅޿ߡ‫ޔ‬ᾲ⤘ᒛߚᓇ㗀ࠍ෸߷ߔ‫ޕ‬ଥᢙߩ㆑޿߆ࠄ Al2O3 ᒝൻ⋧߅ࠃ߮ Si ⋧ㄭறߩࡑ࠻࡝࠶ࠢࠬ⋧ߦォ૏߇ᄙߊ⊒↢ߒ㧔Fig.9㧕㧘ᤨല⎬ൻࠍടㅦߐߖࠆߎߣ߽␜ߐࠇߡ޿ࠆ 8)‫ࠢ࠶࡝࠻ࡑޕ‬ࠬ⋧ߪᒝൻ⋧ࠍ଻ᜬߔࠆߣ߽ߦᒝൻ⋧ߦ߆߆ࠆᔕജࠍㅪ⛯⊛ߦ✭๺ߔࠆᔅⷐ߇޽ࠅ‫ޔ‬ᒝൻ⋧ߣߩ⇇㕙⚿วᕈ߿๟࿐ߩ⚵❱߽฽߼ߚⶄว᧚ᢱߩᾲಣℂ⸳
⸘߇㊀ⷐߣ⠨߃ࠄࠇࠆ‫ޕ‬

Fig.8 Influence of addition of N on hardness ofFe- 1.7㨪2.3%C- 5%Cr- 5%Mo- 5%V alloy.

Fig.10 Relation between fatigue limit stressand stress concentration factor for SiC
particle reinforced AC4B alloy composites.
Fig.10 ߦ SiC ☸ሶಽᢔ Al ⶄว᧚ᢱߩಾᰳ߈࿁ォᦛߍ∋ഭ⹜㛎ߩ⚿ᨐࠍ␜ߒߚ 9)‫ޕ‬ಾᰳ߈߇ή޿ᐔṖ⹜ᢱ㧔ᔕജ㓸ਛଥᢙ Kt=1㧕ߦ߅޿ߡߪ‫ࠢ࠶࡝࠻ࡑޔ‬ࠬว㊄⹜ᢱߩ∋ഭ㒢ᐲ߇ 140MPa ߣᦨ߽㜞ߊ‫৻ޔ‬ᣇ㧘ⶄว⹜ᢱߩ୯߇ 110㨪120MPa ߣૐ޿୯ࠍ␜ߔ‫ޕ‬߹ߚ‫⇇⥃ߩ߼ߚࠆߖߐ↢⊒ࠍⵚ߈ޔ‬ᔕജߔߥࠊߜ߈ⵚ⊒↢ᔕജ㧔ǻw1㧕߅ࠃ߮⊒↢ߒߚ߈ⵚ߇ㅴዷߒߡ
⹜ᢱࠍ⎕უߐߖࠆ⥃⇇ᔕജߔߥࠊߜ߈ⵚㅴዷ㒢⇇ᔕജ㧔ǻw2㧕ߦ᣿⏕ߥᏅߪߥ޿‫ޔߚ߹ޕ‬ಾᰳ߈ඨᓘ

Fig.9 Distribution of dislocation around hard
phases (alumina and eutectic Si) in Al-Si-Cu
alloy which were solution treated at 773K for10h.

߇ 0.1mm㧔ᔕജ㓸ਛଥᢙ Kt=3.76㧕ߩ႐ว‫ޔ‬ಾᰳ߈ߩሽ࿷ߦࠃࠅ߈ⵚ⊒↢ߪ 55MPa ߣ⪺ߒߊૐߊߥࠅ‫ⵚ߈ޔ‬ㅴዷ㒢⇇ᔕജߦߟ޿ߡ߽ࡑ࠻࡝࠶ࠢࠬ⹜ᢱ
ߢߪ 65MPa ߣૐਅߒߚ‫ⶄޔࠄ߇ߥߒ߆ߒޕ‬ว⹜ᢱ9フジコー技報−tsukuru No. ࡛ࡣᛂຊ㞟୰ಀᩘࡀቑຍࡋ࡚ࡶࠊࡁ⿣㐍ᒎ㝈⏺ᛂຊ䠒䠊䛚䜟䜚䛻㻌ࡣ࡯࡜ࢇ࡝ኚ໬ࡏࡎࠊ9vol%SiC ヨᩱ࡛ 95MPaࠊ ࣮ࣟࣝᮦࢆ⪏ᦶ⪖」ྜᮦᩱ࡜ࡋ࡚࡜ࡽ࠼ࠊᙉ໬┦31vol%SiC ヨ ᩱ ࡛ 105MPa ࢆ ♧ ࡋ ࠊ ≉ ࡟࡜࣐ࢺࣜࢵࢡࢫ┦ࡢᮦᩱタィ࡟ࡘ࠸࡚ᴫㄝࡋࡓࠋ⤌31vol%SiC ヨᩱ࡛ࡣᖹ⁥ᮦࡢ⑂ປ㝈ᗘ㸦110MPa㸧⧊Ꮫⓗ࡟ࡣ࣐ࢺࣜࢵࢡࢫࡢ≉ᛶྥୖ࠿ࡽ╔┠ࡍ࡭࡜࡯ࡰྠ➼ࡢ್ࢆ♧ࡍ⤖ᯝࡀᚓࡽࢀࡓࠋࡍ࡞ࢃࡕࠊࡁ࡛ࡣ࠶ࡿࡀࠊ࣐ࢺࣜࢵࢡࢫࡢ≉ᛶᨵၿࡀ㝈⏺࡟ࡁ」ྜᮦᩱࡢษḞࡁᅇ㌿᭤ࡆ⑂ປヨ㦂࡛ࡣࠊᙉ໬┦ࡢ࡚࠸ࡿ࡜ࡍࡿ࡜ࠊⅣ໬≀ࡑࡢࡶࡢࡢ≉ᛶࡢྥୖࠊ࠾ศ࡟ࡼࡾࠊࡁ⿣ࡀ⏕ᡂࡋ࡚ࡶ◚᩿࡟⮳ࡽ࡞࠸᮲௳ࡀࡼࡧ࣐ࢺࣜࢵࢡࢫ┦࡜ࡢ⏺㠃ᙉᗘࡢྥୖࡀ௒ᚋࡶ

ᗈ࠿ࡗࡓࠋࡑࡇ࡛ࠊᮍ」ྜヨᩱ࠾ࡼࡧ」ྜヨᩱࡢ⑂ᚲせ࡜⪃࠼ࡽࢀࡿࠋࡉࡽ࡟⾲㠃⢒ࡉࡸ⇕ᛂຊࠊ⇕⭾ປ◚㠃ࢆ 45r᪉ྥ࠿ࡽほᐹࡋࠊࡑࡢ⤖ᯝ࠾ࡼࡧ◚ᙇ࡟㉳ᅉࡍࡿ⇕ࢧ࢖ࢡࣝ⑂ປ࡞࡝ࠊࡼࡾ⌧ሙ࡟┤⤖ቯࡢᶍᘧᅗࢆ Fig.11 ࡟♧ࡋࡓࠋ࣐ࢺࣜࢵࢡࢫྜ㔠ࡋࡓၥ㢟࡟ࡘ࠸࡚ࡶ⥲ྜⓗ࡟ホ౯࣭㛤Ⓨࡋ࡚࠸ࡃᚲ

ヨᩱ࡛ࡣࠊヨ㦂∦ෆ㒊᪉ྥ࡬ࡢࡁ⿣ࡀẚ㍑ⓗ┤⥺࡟せࡀ࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ

㐍ᒎࡋ࡚࠾ࡾࠊࡲࡓࠊࡁ⿣ࡣษḞࡁᗏ⾲㠃࡟Ⓨ⏕ࡋࠊࡑࢀࡽࡀ㐃⤖ࡋ࡚ᡂ㛗ࡋ࡚◚᩿࡟⮳ࡗ࡚࠸ࡿࠋ୍᪉ࠊ

ཧ⪃ᩥ⊩」ྜᮦ࡛ࡣ Fig.11㸦c㸪d㸧࡟♧ࡍࡼ࠺࡟ࠊ⑂ປࡁ⿣1) 㗪㐀ᢏ⾡ㅮᗙ⦅㞟ጤဨ఍ ⦅: “㗪㐀ᢏ⾡ㅮᗙ 4ࡣษḞࡁ㒊௨እࡢ SiC ⢏Ꮚจ㞟㒊࠿ࡽࡶከᩘⓎ⏕≉ Ṧ 㗪 㕲 㗪 ≀ ”, ᪥ ห ᕤ ᴗ ᪂ ⪺ ♫ (1970),

ࡋࠊ㠀ᖖ࡟พฝࡢ⃭ࡋ࠸」㞧࡞◚㠃ࢆᙧᡂࡋ࡚࠸ࡿࠋ

p.253-260.

ࡇࡢഴྥࡣ 31vol%SiC ヨᩱࡢ᪉ࡀ኱ࡁࡃࠊࡁ⿣ࡢ
㐍ᒎ᪉ྥࡢኚ໬ࡸศᒱࡢ㢖ᗘࡀ㧗࠸ࠋSiC ⢏Ꮚจ㞟㒊ࡀࡁ⿣㐍ᒎࡢ᢬ᢠ࡜࡞ࡿ⌮⏤ࡣࠊ௒ᚋヲ⣽࡞ㄪᰝࡀᚲせ࡛࠶ࡿࡀࠊSiC ⢏Ꮚ㏆ഐ࡛ࡣࠊୖ㏙ࡍࡿࡼ࠺

2) F. Neumann, H. Schenck and W. Patterson:
Giesserei, 47(1960), 25.
3) ᯇཎ Ᏻᏹ㸪኱ᇛ ᱇స㸪ᯇ⏣ බᢇ: 㗪≀
48(1976)12, 784-789.

࡟࣐ࢺࣜࢵࢡࢫྜ㔠࡜ࡢ⇕⭾ᙇಀᩘࡢᕪ࡟ࡼࡾᑟ

4) ኱ᇛ ᱇స: 㗪≀ 66(1994)10, 764-771.

ධࡉࢀࡓ㧗ᐦᗘ࡟Ꮡᅾࡍࡿ㌿఩ࡸࠊࡁ⿣࿘㎶ࡢຍᕤ5) H. Miyahara, Sergio V. Bravo, K. Yamamoto◳໬࠾ࡼࡧረᛶㄏ㉳ࡁ⿣㛢ཱྀࢆຓ㛗ࡋࠊࡉࡽ࡟ࠊࡁ

and K. Ogi, ISIJ Int. 49(7) (2009),1075-1079.

⿣ࡀศᒱࡍࡿࡇ࡜࡟ࡼࡿࡁ⿣ඛ➃࡛ࡢᛂຊ㞟୰⦆6) ཎ 㝯ኴ㑻, ᒣᮏ ᫀᏹ, ఀᮾ ᙪ, ୖᐑ⏣ ࿴࿴ࠊᚓࡽࢀࡿพฝࡢ⃭ࡋ࠸◚㠃࡟ࡼࡾ⏕ࡎࡿ◚㠃⢒๎, ᡂ⏣ ୍ே, ᐑཎ ᗈ㑳,᪥ᮏ㔠ᒓᏛ఍ㄅ,ࡉㄏ㉳ࡁ⿣㛢ཱྀ➼ࡶຍ࠼࡚ࠊࡁ⿣ࡢఏࡥࠊ㐍ᒎ࠾ࡼ

79(4)2015, 169-175.

ࡧ⤖ྜࢆጉࡆࠊࡁ⿣ఏࡥ᢬ᢠࡦ࠸࡚ࡣࡁ⿣㐍ᒎ㝈⏺
ᛂຊࢆྥୖࡉࡏࡓ࡜⪃࠼ࡽࢀࡿࠋ

7) Hua-Nan Liu and K. Ogi, J of Materials
Science 34(1999) 5593-5599.
8) H.G Kang, M. Kida, H. Miyahara and K. Ogi,
Int. J. Cast Metal Research, 15(2002),1-7.
9) H. Miyahara, Y. Maruno and K. Ogi, Materials
Transactions, 46(5) (2005), 950-958㸬

Fig.11 Scanning electron micrographs of fatigue
fracture surfaces for unreinforced AC4B alloy(a,b), and 31vol%SiC reinforced composites(c,d).
10