JP5810588B2 - 浸炭雰囲気炉用熱反射板及び浸炭処理方法 - Google Patents
浸炭雰囲気炉用熱反射板及び浸炭処理方法 Download PDFInfo
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- JP5810588B2 JP5810588B2 JP2011079251A JP2011079251A JP5810588B2 JP 5810588 B2 JP5810588 B2 JP 5810588B2 JP 2011079251 A JP2011079251 A JP 2011079251A JP 2011079251 A JP2011079251 A JP 2011079251A JP 5810588 B2 JP5810588 B2 JP 5810588B2
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Description
試験方法:大気中で供試材の下面を加熱し、上面温度を接触式温度計(熱電対)により求め、同時測定の放射温度計による測定値と一致するように、放射率を補正し、「1−(放射率)」により反射率を求めた。
試験方法は、箱型の加熱炉の内壁に反射板として厚さ10μmmのアルミ箔を貼り、該反射板を設けた場合及び反射板を設けない場合の、昇温に必要な電力、温度保持中の炉表面の温度の差をみて前記反射板の熱反射効果、放射熱遮断効果及び被処理物の均一加熱の検証を行った。
発明者は前記反射板の効果検証に基づき、浸炭炉への反射板の使用について試験を行った。浸炭炉に使用する反射板には、浸炭雰囲気に対する耐食性、空気に対する耐酸化性及び処理温度に対する耐高温性などが要求される。本発明者は超耐熱合金に注目した。
試験条件;カーボンポテンシャルが0.8、温度930℃の浸炭ガス雰囲気の炉内に供試材を配置(暴露)し、1週間後、2週間後にそれぞれ前記供試材を取り出しての反射率を測定した。
Claims (4)
- ニッケル基超耐熱合金よりなる供試材を、カーボンポテンシャルが0.8で温度が930℃の浸炭ガス雰囲気の炉内に配置して1週間後に取り出し、大気中で200℃、500℃の各温度に加熱して測定した熱反射率がいずれも50%以上である前記ニッケル基超耐熱合金よりなる浸炭雰囲気炉用熱反射板。
- ニッケル基超耐熱合金よりなる供試材を、カーボンポテンシャルが0.8で温度が930℃の浸炭ガス雰囲気の炉内に配置して1週間後に取り出し、大気中で200℃、500℃、950℃の各温度に加熱して測定した熱反射率がいずれも50%以上である前記ニッケル基超耐熱合金よりなる浸炭雰囲気炉用熱反射板。
- 前記ニッケル基超耐熱合金がクロムとアルミニウムを含有することを特徴とする請求項1又は2に記載の浸炭雰囲気炉用熱反射板。
- 断面が矩形の炉内の側面壁と上下壁に、請求項1,2又は3に記載の浸炭雰囲気炉用熱反射板を設置し、浸炭雰囲気で加熱し浸炭処理を行う浸炭処理方法。
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JP5810588B2 true JP5810588B2 (ja) | 2015-11-11 |
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JPS59205583A (ja) * | 1983-05-06 | 1984-11-21 | 大阪瓦斯株式会社 | 工業炉 |
JPH01179241A (ja) * | 1987-12-28 | 1989-07-17 | Mitsui Petrochem Ind Ltd | 光磁気記録媒体 |
JPH1193605A (ja) * | 1997-09-16 | 1999-04-06 | Ishikawajima Harima Heavy Ind Co Ltd | セラミックタービン動翼の緩衝層 |
JP5056415B2 (ja) * | 2005-08-17 | 2012-10-24 | 旭硝子株式会社 | 溶融ガラスの導管構造 |
JP3967369B2 (ja) * | 2005-08-26 | 2007-08-29 | 松下電器産業株式会社 | 反射体および当該反射体を備えた装置 |
WO2007108417A1 (ja) * | 2006-03-23 | 2007-09-27 | Murata Manufacturing Co., Ltd. | 熱処理炉 |
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