TWI609085B - Oil quenching furnace tray - Google Patents
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- C04B35/521—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained by impregnation of carbon products with a carbonisable material
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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- C—CHEMISTRY; METALLURGY
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
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- C04B2235/74—Physical characteristics
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
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- Y10T428/2913—Rod, strand, filament or fiber
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Description
本發明係有關於油淬火熱處理爐用托盤。
熱處理爐常在800℃以上的高溫下進行熱處理,惟金屬製托盤因其高溫強度不夠充足,在使用中容易發生變形或龜裂,使用期限甚短。依此,由於C/C等的碳材料製托盤比起金屬製托盤高溫強度較高,縱使在高溫熱處理下,亦較少發生變形或龜裂。而且,碳材料由於可達輕量設計,可壓低熱容量,亦有爐運作之耗電較少的優點。然,由於其為材料中含有大量孔隙的多孔性材料,在進行油淬火熱處理的情況下,若於熱處理後使被熱處理物與托盤一同浸漬於油中並使其急速冷卻,則油會浸透至C/C的孔隙內而殘留。當再度使用該托盤之際,如有油殘留時,則有在熱處理中油分解而造成被處理物變色等不良影響。
為解決此種問題,已有人揭露一種使矽含浸於C/C材而成的油淬火熱處理爐用C/C製托盤。(參照下述專利文獻1)。
[專利文獻1]日本特開2004-067478號公報
然而,含浸有矽的C/C製托盤,在高溫處理下被處理物與矽成分易發生反應而生成矽化物,恐有影響處理物品質之虞。又因含浸的矽使重量變大,未能發揮屬碳材料優點的輕量性,亦有含浸的矽使熱容量變大之顧慮。更者,由於矽對油的沾染性較高,為防止油的浸透則需形成緻密之組織而將開口孔隙率減至極低,除增加上述不利情形外,同時製造步驟亦屬繁瑣。
因此,本發明係以提供一種可抑止油的浸透、可減少在高溫處理下對被處理物品質的影響,並可輕量地構成的油淬火熱處理爐用托盤為目的
為達成上述目的,本發明係一種托盤,其包含碳材料,並可在載置有被處理物的狀態下進行該被處理物的油淬火,其特徵為:在前述碳材料中,孔隙半徑1μm以上之累積孔隙容積為40mm3/g以下。
根據本發明,能發揮可提供一種可抑止油的浸透、可減少在高溫處理下對被處理物品質的影響,並可輕量地構成的油淬火熱處理爐用托盤等的優良效果。
第1圖係表示實施例1~3及比較例1,2中,孔隙半徑未達1μm之累積孔隙容積與孔隙半徑1μm以上之累積孔隙容積的圖表。
第2圖係表示孔隙半徑1μm以上之累積孔隙容積與油滲入量的關係的圖表。
本發明係一種托盤,其包含碳材料,並可在載置有被處理物的狀態下進行該被處理物的油淬火,其特徵為:在前述碳材料中,孔隙半徑1μm以上之累積孔隙容積為40mm3/g以下。
在碳材料中,孔隙半徑1μm以上之累積孔隙容積若為40mm3/g以下,則油的滲入量大幅減少。而且,透過包含碳材料,得以防止對被處理物品質的影響。更者,還可壓低重量或熱容量。
前述碳材料較佳為使用C/C複合物所形成者。
C/C製托盤比起金屬製托盤高溫強度或耐熱衝擊性較高,縱使在高溫熱處理下,亦較少發生變形或龜裂。又,由於高溫強度高且可達輕量設計,可壓低熱容量,亦有耗電較少的優點。
前述碳材料較佳為使熱硬化性樹脂含浸於C/C複合物並進行燒成而成者。
可採用無損C/C複合材料之優良特性,且供調整累積孔隙容積的材料不易分離之構成。又,C/C複合物在對托盤加工後,易使油從加工端面浸透,可藉由含浸來被覆端面。
前述碳材料較佳為其含浸前的原材料之累積孔隙容積為70mm3/g以上。
C/C複合物原本為多孔性材料,藉由含浸縮小累積孔隙容積之效果較大。
前述碳材料較佳為體密度為1.8g/cm3以下。
透過包含碳材料,可使體密度容易地成為1.8g/cm3以下,易於輕量地構成。
上述之油淬火熱處理爐用托盤較佳使用於滲碳處理。
藉由滲碳處理,金屬或矽之耐熱衝擊性降低,有淬火時發生破裂之虞,但透過包含碳材料,即使經過滲碳亦不會加劇脆化,故可防止耐熱衝擊性降低。
此外,作為所使用的熱處理爐,較佳為在800~1000℃左右使用的爐。
組合Toyo Tanso(股)CX-761(使用PAN系碳纖維,添加酚樹脂並進行衝壓成形後,為達緻密化而重複瀝青含浸、燒成3次,製成體密度1.63Mg/m3、孔隙半徑1μm以上之累積孔隙容積為55mm3/g的C/C材料)之厚度5mm的板材,予以加工成托盤形狀而作成托盤前驅體。將比重1.16之酚樹脂(SUMITOMO BAKELITE製)在大氣壓下含浸於該托盤前驅體1次並進行燒成,得到體密度1.63Mg/m3、孔隙半徑1μm以上之累積孔隙容積為30mm3/g的油淬火熱處理爐用托盤(以下有簡稱為「熱處理爐用托盤」)。
使與實施例1同樣的托盤前驅體減壓浸漬於比重1.16之酚樹脂(SUMITOMO BAKELITE製)後,以0.5MPa加壓含浸1次並進行燒成,得到熱處理爐用托盤。
將與實施例1同樣的托盤前驅體配置於真空爐內並升溫至1100℃後,一面以10(l/min)之流速流通CH4氣體,一面將壓力控制於10Torr並且保持100小時,再藉
由CVI處理使熱分解碳含浸,得到熱處理爐用托盤。
將實施例1之托盤前驅體直接作為熱處理爐用托盤使用。
將比重1.03之酚樹脂(SUMITOMO BAKELITE製)在大氣壓下含浸於實施例1之托盤前驅體1次並進行燒成,得到熱處理爐用托盤。
經調查上述實施例1~3及比較例1,2所示之熱處理爐用托盤之體密度與累積孔隙容積(孔隙半徑未達1μm之累積孔隙容積與孔隙半徑1μm以上之累積孔隙容積),而將彼等之結果示於表1及第1圖。
此外,體密度係利用採阿基米德法(利用所謂液體中的固體承受與同體積之液體的重量相等程度之浮力的自然定律來求取試料密度的方法)的電子比重計(Mirage貿易(股)製ED-120T)來測定。又,累積孔隙容積係利用水銀壓入法進行孔隙分布測定,並將其結果作成圖表而求得。在水銀壓入法中,最大壓力係加壓至108MPa,孔隙半徑係由水銀孔隙度計之水銀外加壓力,依瓦士本公式來求得。瓦士本公式係以r=-2δcosθ/P表
示,於此,r:孔隙之半徑、δ:水銀之表面張力(480dyne/cm)、θ:接觸角(本發明中使用141.3°)、P:壓力。
由表1及第1圖可明瞭,實施例1~3之托盤相較於比較例1,2之托盤體密度較高,且孔隙半徑1μm以上之累積孔隙容積皆為40mm3/g以下,可確認變小。
經調查上述實施例1~3及比較例1,2所示之熱處理爐用托盤之油滲入量,而將其結果示於上述表1及第2圖。此外,實驗係如下進行:
對上述實施例1~3及比較例1,2所示之熱處理爐用托盤預先進行重量測定,分別在大氣壓下予以浸漬於120℃的油中1小時後靜置30分鐘,再進行浸漬後的重量
測定。由增加的重量除以表面積,來算出每單位體積之油的浸透量。
本發明人等發現,油滲入量超過40mg/cm3時,油或清洗步驟之溶劑會浸透至熱處理爐用托盤的孔隙並殘留,而發生爐內真空度明顯下降等不良情形。由表1及第2圖可明瞭,茲確認在實施例1~3中油滲入量皆為40mg/cm3以下,與此相對,在比較例1,2中油滲入量則均超過40mg/cm3。因此,在實施例1~3中,可避免爐內真空度明顯下降等的不良情形。
本發明可以使用於滲碳處理等。
Claims (8)
- 一種油淬火熱處理爐用托盤,其係由使用C/C複合物所形成之碳材料所構成,並可在載置有被處理物的狀態下進行該被處理物的油淬火的托盤,其特徵為:前述碳材料中,孔隙半徑1μm以上之累積孔隙容積為40mm3/g以下。
- 如請求項1之油淬火熱處理爐用托盤,其中前述碳材料係使熱硬化性樹脂含浸於C/C複合物並進行燒成者。
- 如請求項2之油淬火熱處理爐用托盤,其中前述碳材料其含浸前的原材料之累積孔隙容積為70mm3/g以上。
- 如請求項1項之油淬火熱處理爐用托盤,其中前述碳材料之體密度為1.8g/cm3以下。
- 如請求項2項之油淬火熱處理爐用托盤,其中前述碳材料之體密度為1.8g/cm3以下。
- 如請求項1項之油淬火熱處理爐用托盤,其係使用於滲碳處理。
- 如請求項2項之油淬火熱處理爐用托盤,其係使用於滲碳處理。
- 一種油淬火熱處理爐用托盤,其係由體密度為1.8g/cm3以下之碳材料所構成,並可在載置有被處理物的狀態下進行該被處理物的油淬火的托盤,其特徵為:前述碳材料中,孔隙半徑1μm以上之累積孔隙容積為40mm3/g以下。
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JP2013036415A JP6013940B2 (ja) | 2013-02-26 | 2013-02-26 | 油焼き入れ熱処理炉用トレーの製造方法および浸炭処理方法 |
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WO2020040207A1 (ja) * | 2018-08-21 | 2020-02-27 | 日光金属株式会社 | 熱処理用トレイ部材及び熱処理用積層構造体 |
EP4134359A4 (en) * | 2020-04-10 | 2024-05-29 | Toyo Tanso Co | C/C COMPOSITE AND METHOD FOR PRODUCING THE SAME AND HEAT TREATMENT JIG AND METHOD FOR PRODUCING THE SAME |
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JPH0748191A (ja) * | 1993-08-06 | 1995-02-21 | Mitsubishi Gas Chem Co Inc | 炭素繊維強化炭素複合セミカーボン材の製造法 |
JP2001123219A (ja) * | 1999-10-22 | 2001-05-08 | Nippon Techno:Kk | 熱処理用治具 |
JP2004067478A (ja) * | 2002-08-09 | 2004-03-04 | Nippon Carbon Co Ltd | 熱処理炉用トレ− |
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2014
- 2014-02-25 WO PCT/JP2014/054478 patent/WO2014132955A1/ja active Application Filing
- 2014-02-25 US US14/769,564 patent/US20150368731A1/en not_active Abandoned
- 2014-02-25 EP EP14756979.2A patent/EP2963001A4/en active Pending
- 2014-02-26 TW TW103106470A patent/TWI609085B/zh active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0748191A (ja) * | 1993-08-06 | 1995-02-21 | Mitsubishi Gas Chem Co Inc | 炭素繊維強化炭素複合セミカーボン材の製造法 |
JP2001123219A (ja) * | 1999-10-22 | 2001-05-08 | Nippon Techno:Kk | 熱処理用治具 |
JP2004067478A (ja) * | 2002-08-09 | 2004-03-04 | Nippon Carbon Co Ltd | 熱処理炉用トレ− |
Also Published As
Publication number | Publication date |
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US20150368731A1 (en) | 2015-12-24 |
JP2014162694A (ja) | 2014-09-08 |
JP6013940B2 (ja) | 2016-10-25 |
EP2963001A4 (en) | 2016-10-19 |
EP2963001A1 (en) | 2016-01-06 |
WO2014132955A1 (ja) | 2014-09-04 |
TW201502281A (zh) | 2015-01-16 |
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