{"id":700103,"date":"2024-11-02T03:45:23","date_gmt":"2024-11-02T02:45:23","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=700103"},"modified":"2024-11-02T03:45:23","modified_gmt":"2024-11-02T02:45:23","slug":"kiem-tra-vat-lieu-cach-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/kiem-tra-vat-lieu-cach-nhiet\/","title":{"rendered":"Ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">Ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1ch \u0111o hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00f4ng nghi\u1ec7p v\u00e0 x\u00e2y d\u1ef1ng.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/kiem_tra_vat_lieu_cach_nhiet.png\" alt=\"Ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ki\u1ec3m Tra V\u1eadt Li\u1ec7u C\u00e1ch Nhi\u1ec7t<\/h2>\n<p>Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, vi\u1ec7c ki\u1ec3m tra v\u00e0 \u0111\u00e1nh gi\u00e1 v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t. C\u00e1c nh\u00e0 khoa h\u1ecdc v\u00e0 k\u1ef9 s\u01b0 nhi\u1ec7t th\u01b0\u1eddng s\u1eed d\u1ee5ng m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau \u0111\u1ec3 ki\u1ec3m tra c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p v\u00e0 ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/p>\n<h2>Ph\u01b0\u01a1ng Ph\u00e1p Ki\u1ec3m Tra<\/h2>\n<p><u1><\/p>\n<li><b>Ph\u00e9p \u0110o \u0110\u1ed9 D\u1eabn Nhi\u1ec7t:<\/b> \u0110\u1ed9 d\u1eabn nhi\u1ec7t (\\lambda) l\u00e0 m\u1ed9t trong nh\u1eefng th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t. N\u00f3 \u0111o kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u. Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t l\u00e0 s\u1eed d\u1ee5ng m\u00e1y \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t d\u1ea1ng \u0111\u0129a n\u00f3ng ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p c\u00e1ch nhi\u1ec7t ng\u1eafn h\u1ea1n (Transient Plane Source Method).<\/li>\n<li><b>Ph\u00e9p \u0110o \u0110\u1ed9 Th\u1ea9m Th\u1ea5u Nhi\u1ec7t:<\/b> \u0110\u1ed9 th\u1ea9m th\u1ea5u nhi\u1ec7t (\\alpha) l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u truy\u1ec1n nhi\u1ec7t d\u01b0\u1edbi d\u1ea1ng s\u00f3ng nhi\u1ec7t. \u0110\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb \u0111o v\u00e0 t\u00ednh to\u00e1n th\u00f4ng qua ph\u01b0\u01a1ng tr\u00ecnh Fourier.<\/li>\n<li><b>Ph\u00e9p \u0110o Kh\u1ed1i L\u01b0\u1ee3ng Ri\u00eang v\u00e0 \u0110\u1ed9 D\u00e0y:<\/b> Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (\\rho) v\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u00e1ch nhi\u1ec7t. C\u00e1c d\u1ee5ng c\u1ee5 \u0111\u01a1n gi\u1ea3n nh\u01b0 c\u00e2n v\u00e0 th\u01b0\u1edbc k\u1eb9p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y.<\/li>\n<li><b>Ph\u00e9p \u0110o \u0110\u1ed9 B\u1ec1n Nhi\u1ec7t:<\/b> \u0110\u1ed9 b\u1ec1n nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng ho\u1eb7c h\u1ecfng h\u00f3c. Th\u1eed nghi\u1ec7m n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong l\u00f2 nung v\u1edbi c\u00e1c m\u1ee9c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau v\u00e0 theo d\u00f5i s\u1ef1 thay \u0111\u1ed5i c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n<p><\/u1><\/p>\n<h2>Ti\u00eau Chu\u1ea9n Ki\u1ec3m Tra<\/h2>\n<p>Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p, vi\u1ec7c ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t th\u01b0\u1eddng tu\u00e2n theo c\u00e1c ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c v\u00e0 \u0111\u00e1ng tin c\u1eady c\u1ee7a k\u1ebft qu\u1ea3. M\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<p><u1><\/p>\n<li><b>ASTM C177:<\/b> Ti\u00eau chu\u1ea9n n\u00e0y x\u00e1c \u0111\u1ecbnh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 c\u00e1ch nhi\u1ec7t t\u0129nh.<\/li>\n<li><b>ISO 8302:<\/b> Ti\u00eau chu\u1ea9n n\u00e0y li\u00ean quan \u0111\u1ebfn ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t b\u1eb1ng c\u00e1ch d\u00f9ng m\u00e1y \u0111o d\u1ea1ng \u0111\u0129a n\u00f3ng.<\/li>\n<li><b>EN 12667:<\/b> Chuy\u00ean v\u1ec1 \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a c\u00e1c t\u1ea5m c\u00e1ch nhi\u1ec7t ph\u1eb3ng v\u1edbi s\u1eed d\u1ee5ng m\u00e1y \u0111o song ph\u1eb3ng n\u00f3ng.<\/li>\n<p><\/u1><\/p>\n<h2>\u1ee8ng D\u1ee5ng Th\u1ef1c Ti\u1ec5n<\/h2>\n<p>V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, t\u1eeb x\u00e2y d\u1ef1ng \u0111\u1ebfn c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ch\u00ednh bao g\u1ed3m:<\/p>\n<p><u1><\/p>\n<li><b>X\u00e2y D\u1ef1ng:<\/b> S\u1eed d\u1ee5ng trong t\u01b0\u1eddng, m\u00e1i nh\u00e0, v\u00e0 s\u00e0n \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 m\u1ea5t m\u00e1t nhi\u1ec7t v\u00e0 t\u0103ng hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c c\u00f4ng tr\u00ecnh.<\/li>\n<li><b>C\u00f4ng Nghi\u1ec7p:<\/b> C\u00e1ch nhi\u1ec7t cho c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng, l\u00f2 c\u00f4ng nghi\u1ec7p, v\u00e0 thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t \u0111\u1ec3 b\u1ea3o v\u1ec7 nh\u00e2n vi\u00ean v\u00e0 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 c\u1ea7n thi\u1ebft cho qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/li>\n<li><b>Ng\u00e0nh \u00d4 T\u00f4:<\/b> S\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a xe \u0111\u1ec3 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi l\u00e1i v\u00e0 h\u00e0nh kh\u00e1ch kh\u1ecfi nhi\u1ec7t \u0111\u1ed9 cao t\u1eeb \u0111\u1ed9ng c\u01a1 v\u00e0 h\u1ec7 th\u1ed1ng x\u1ea3.<\/li>\n<p><\/u1><\/p>\n<p>Qua vi\u1ec7c ki\u1ec3m tra v\u00e0 \u0111\u00e1nh gi\u00e1 v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t, c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 khoa h\u1ecdc c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 t\u0103ng c\u01b0\u1eddng s\u1ef1 b\u1ec1n b\u1ec9 c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c s\u1ed1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1ch \u0111o hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00f4ng nghi\u1ec7p v\u00e0 x\u00e2y d\u1ef1ng.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t<\/title>\n<meta name=\"description\" content=\"Ki\u1ec3m tra v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1ch \u0111o hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00f4ng nghi\u1ec7p v\u00e0 x\u00e2y d\u1ef1ng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/vi\/kiem-tra-vat-lieu-cach-nhiet\/\" \/>\n<meta property=\"og:locale\" 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