{"id":7158,"date":"2024-12-02T04:26:31","date_gmt":"2024-12-02T04:26:31","guid":{"rendered":"https:\/\/protech-transfer.com\/2024\/12\/02\/shrinkage-porosity-in-jewelry-casting\/"},"modified":"2025-12-24T12:31:30","modified_gmt":"2025-12-24T12:31:30","slug":"shrinkage-porosity-in-jewelry-casting","status":"publish","type":"post","link":"https:\/\/protech-transfer.com\/vi\/2024\/12\/02\/shrinkage-porosity-in-jewelry-casting\/","title":{"rendered":"Co r\u00fat kim lo\u1ea1i trong qu\u00e1 tr\u00ecnh \u0111\u00fac trang s\u1ee9c"},"content":{"rendered":"

R\u1ed7 co r\u00fat l\u00e0 g\u00ec?<\/b><\/span><\/h3>\n

R\u1ed7 co r\u00fat l\u00e0 c\u00e1c khoang r\u1ed7 kh\u00f4ng \u0111\u1ec1u xu\u1ea5t hi\u1ec7n trong kim lo\u1ea1i khi kim lo\u1ea1i co l\u1ea1i trong qu\u00e1 tr\u00ecnh \u0111\u00f4ng \u0111\u1eb7c \u2013 \u0111\u00e2y l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ed5 bi\u1ebfn trong \u0111\u00fac trang s\u1ee9c. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra do th\u1ec3 t\u00edch gi\u1ea3m \u0111\u1ed9t ng\u1ed9t khi kim lo\u1ea1i chuy\u1ec3n t\u1eeb tr\u1ea1ng th\u00e1i l\u1ecfng sang r\u1eafn.\u1ede c\u00e1c h\u1ee3p kim kh\u00e1c nhau, t\u1ef7 l\u1ec7 co r\u00fat c\u00f3 th\u1ec3 dao \u0111\u1ed9ng t\u1eeb 4\u20136% \u0111\u1ed1i v\u1edbi kim lo\u1ea1i nh\u01b0 v\u00e0ng v\u00e0 b\u1ea1c.
\nN\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3, r\u1ed7 co r\u00fat s\u1ebd d\u1eabn \u0111\u1ebfn c\u00e1c l\u1ed7i th\u1ea5y \u0111\u01b0\u1ee3c tr\u00ean s\u1ea3n ph\u1ea9m nh\u01b0 l\u1ed7 r\u1ed7, h\u1ed1c nh\u1ecf\u2026<\/p>\n

H\u00ecnh th\u00e0nh v\u00e0 Bi\u1ec3u hi\u1ec7n<\/b><\/span><\/h3>\n

Trong qu\u00e1 tr\u00ecnh \u0111\u00f4ng \u0111\u1eb7c, c\u00e1c nh\u00e1nh tinh th\u1ec3 kim lo\u1ea1i (gi\u1ed1ng nh\u01b0 c\u00e0nh c\u00e2y) h\u00ecnh th\u00e0nh v\u00e0 kim lo\u1ea1i l\u1ecfng ph\u1ea3i di chuy\u1ec3n gi\u1eefa c\u00e1c nh\u00e1nh n\u00e0y \u0111\u1ec3 b\u00f9 v\u00e0o ph\u1ea7n b\u1ecb co l\u1ea1i. Khi qu\u00e1 tr\u00ecnh \u201cc\u1ea5p b\u00f9\u201d n\u00e0y th\u1ea5t b\u1ea1i, r\u1ed7 co r\u00fat s\u1ebd x\u1ea3y ra.M\u1ed9t s\u1ed1 kim lo\u1ea1i \u2013 ch\u1eb3ng h\u1ea1n v\u00e0ng tr\u1eafng \u2013 d\u1ec5 b\u1ecb r\u1ed7 co r\u00fat h\u01a1n so v\u1edbi v\u00e0ng v\u00e0ng ho\u1eb7c b\u1ea1c.M\u00e1y \u0111\u00fac ti\u00ean ti\u1ebfn c\u1ee7a Protech Transfer c\u00f3 th\u1ec3 gi\u00fap t\u1ed1i \u01b0u h\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u \u0111\u1ec3 gi\u1ea3m c\u00e1c r\u1ee7i ro n\u00e0y. B\u1ea1n c\u0169ng c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn v\u1ecb tr\u00ed v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a \u1ed1ng d\u1eabn v\u00e0 \u1ed1ng c\u1ea5p li\u1ec7u.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p ph\u00f2ng tr\u00e1nh<\/b><\/span><\/h3>\n
    \n
  1. H\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u \u2013 \u1ed1ng d\u1eabn hi\u1ec7u qu\u1ea3<\/b>
    \n<\/b>Vi\u1ec7c thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u hi\u1ec7u qu\u1ea3 l\u00e0 r\u1ea5t quan tr\u1ecdng. \u1ed0ng d\u1eabn gi\u00fap ch\u1ee9a kim lo\u1ea1i l\u1ecfng \u0111\u1ec3 \u0111i\u1ec1n v\u00e0o c\u00e1c khoang r\u1ed7 h\u00ecnh th\u00e0nh do co r\u00fat. V\u1ecb tr\u00ed \u0111\u1eb7t \u1ed1ng d\u1eabn l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u2013 n\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o ph\u1ea7n n\u1eb7ng nh\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m.
    \n<\/span><\/li>\n
  2. Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 khu\u00f4n v\u00e0 \u0111\u00fac<\/b>
    \n<\/b>Nhi\u1ec7t \u0111\u1ed9 khu\u00f4n v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u0111\u00fac \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng co r\u00fat.
    \nNhi\u1ec7t \u0111\u1ed9 khu\u00f4n cao h\u01a1n c\u00f3 th\u1ec3 c\u00f3 l\u1ee3i, nh\u01b0ng ph\u1ea3i ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn \u0111\u1ec3 tr\u00e1nh g\u00e2y ra c\u00e1c khuy\u1ebft t\u1eadt kh\u00e1c nh\u01b0 r\u1ed7 kh\u00ed.
    \n<\/span><\/li>\n<\/ol>\n

    K\u1ebft lu\u1eadn<\/h3>\n

    \u0110\u1ec3 tr\u00e1nh r\u1ed7 co r\u00fat, thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ee3p kim c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t th\u1ea5p nh\u01b0 v\u00e0ng tr\u1eafng.<\/p>\n

    S\u1eed d\u1ee5ng m\u00e1y m\u00f3c c\u1ee7a Protech Transfer t\u1eeb Indutherm.de<\/a> c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n qu\u00e1 tr\u00ecnh \u0111\u00fac, gi\u1ea3m nguy c\u01a1 l\u1ed7i v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 c\u1ee7a s\u1ea3n ph\u1ea9m trang s\u1ee9c.<\/p>\n

     <\/p>\n

    M\u00c1Y M\u00d3C T\u1ed0T NH\u1ea4T \u2013 D\u1ecaCH V\u1ee4 T\u1ed0T NH\u1ea4T<\/strong>
    \n\u0110\u01b0\u1eddng d\u00e2y n\u00f3ng b\u00e1n h\u00e0ng: +66 8 6332 9347
    \nID LINE b\u00e1n h\u00e0ng: @pttsales
    \n\u0110\u01b0\u1eddng d\u00e2y n\u00f3ng d\u1ecbch v\u1ee5 24\/7: +66 8 9227 9154
    \nID LINE h\u1ed7 tr\u1ee3 d\u1ecbch v\u1ee5: @pttsupport
    \n    Xem t\u1ea5t c\u1ea3 m\u00e1y m\u00f3c<\/a><\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    R\u1ed7 co r\u00fat l\u00e0 g\u00ec? R\u1ed7 co r\u00fat l\u00e0 c\u00e1c khoang r\u1ed7 kh\u00f4ng \u0111\u1ec1u xu\u1ea5t hi\u1ec7n trong kim lo\u1ea1i khi kim lo\u1ea1i co l\u1ea1i trong qu\u00e1 tr\u00ecnh \u0111\u00f4ng \u0111\u1eb7c \u2013 \u0111\u00e2y l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ed5 bi\u1ebfn trong \u0111\u00fac trang s\u1ee9c. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra do th\u1ec3 t\u00edch gi\u1ea3m \u0111\u1ed9t ng\u1ed9t khi kim lo\u1ea1i chuy\u1ec3n t\u1eeb tr\u1ea1ng th\u00e1i l\u1ecfng sang r\u1eafn.\u1ede c\u00e1c h\u1ee3p kim kh\u00e1c nhau, t\u1ef7 l\u1ec7 co r\u00fat c\u00f3 th\u1ec3 dao \u0111\u1ed9ng t\u1eeb 4\u20136% \u0111\u1ed1i v\u1edbi kim lo\u1ea1i nh\u01b0 v\u00e0ng v\u00e0 b\u1ea1c. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3, r\u1ed7 co r\u00fat s\u1ebd d\u1eabn \u0111\u1ebfn c\u00e1c l\u1ed7i th\u1ea5y \u0111\u01b0\u1ee3c tr\u00ean s\u1ea3n ph\u1ea9m nh\u01b0 l\u1ed7 r\u1ed7, h\u1ed1c nh\u1ecf\u2026 H\u00ecnh th\u00e0nh v\u00e0 Bi\u1ec3u hi\u1ec7n Trong qu\u00e1 tr\u00ecnh \u0111\u00f4ng \u0111\u1eb7c, c\u00e1c nh\u00e1nh tinh th\u1ec3 kim lo\u1ea1i (gi\u1ed1ng nh\u01b0 c\u00e0nh c\u00e2y) h\u00ecnh th\u00e0nh v\u00e0 kim lo\u1ea1i l\u1ecfng ph\u1ea3i di chuy\u1ec3n gi\u1eefa c\u00e1c nh\u00e1nh n\u00e0y \u0111\u1ec3 b\u00f9 v\u00e0o ph\u1ea7n b\u1ecb co l\u1ea1i. Khi qu\u00e1 tr\u00ecnh \u201cc\u1ea5p b\u00f9\u201d n\u00e0y th\u1ea5t b\u1ea1i, r\u1ed7 co r\u00fat s\u1ebd x\u1ea3y ra.M\u1ed9t s\u1ed1 kim lo\u1ea1i \u2013 ch\u1eb3ng h\u1ea1n v\u00e0ng tr\u1eafng \u2013 d\u1ec5 b\u1ecb r\u1ed7 co r\u00fat h\u01a1n so v\u1edbi v\u00e0ng v\u00e0ng ho\u1eb7c b\u1ea1c.M\u00e1y \u0111\u00fac ti\u00ean ti\u1ebfn c\u1ee7a Protech Transfer c\u00f3 th\u1ec3 gi\u00fap t\u1ed1i \u01b0u h\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u \u0111\u1ec3 gi\u1ea3m c\u00e1c r\u1ee7i ro n\u00e0y. B\u1ea1n c\u0169ng c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn v\u1ecb tr\u00ed v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a \u1ed1ng d\u1eabn v\u00e0 \u1ed1ng c\u1ea5p li\u1ec7u. Ph\u01b0\u01a1ng ph\u00e1p ph\u00f2ng tr\u00e1nh H\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u \u2013 \u1ed1ng d\u1eabn hi\u1ec7u qu\u1ea3 Vi\u1ec7c thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u hi\u1ec7u qu\u1ea3 l\u00e0 r\u1ea5t quan tr\u1ecdng. \u1ed0ng d\u1eabn gi\u00fap ch\u1ee9a kim lo\u1ea1i l\u1ecfng \u0111\u1ec3 \u0111i\u1ec1n v\u00e0o c\u00e1c khoang r\u1ed7 h\u00ecnh th\u00e0nh do co r\u00fat. V\u1ecb tr\u00ed \u0111\u1eb7t \u1ed1ng d\u1eabn l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u2013 n\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o ph\u1ea7n n\u1eb7ng nh\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m. Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 khu\u00f4n v\u00e0 \u0111\u00fac Nhi\u1ec7t \u0111\u1ed9 khu\u00f4n v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u0111\u00fac \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng co r\u00fat. Nhi\u1ec7t \u0111\u1ed9 khu\u00f4n cao h\u01a1n c\u00f3 th\u1ec3 c\u00f3 l\u1ee3i, nh\u01b0ng ph\u1ea3i ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn \u0111\u1ec3 tr\u00e1nh g\u00e2y ra c\u00e1c khuy\u1ebft t\u1eadt kh\u00e1c nh\u01b0 r\u1ed7 kh\u00ed. K\u1ebft lu\u1eadn \u0110\u1ec3 tr\u00e1nh r\u1ed7 co r\u00fat, thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u1ea5p li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ee3p kim c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t th\u1ea5p nh\u01b0 v\u00e0ng tr\u1eafng. S\u1eed d\u1ee5ng m\u00e1y m\u00f3c c\u1ee7a Protech Transfer t\u1eeb Indutherm.de c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n qu\u00e1 tr\u00ecnh \u0111\u00fac, gi\u1ea3m nguy c\u01a1 l\u1ed7i v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 c\u1ee7a s\u1ea3n ph\u1ea9m trang s\u1ee9c.   M\u00c1Y M\u00d3C T\u1ed0T NH\u1ea4T \u2013 D\u1ecaCH V\u1ee4 T\u1ed0T NH\u1ea4T \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng b\u00e1n h\u00e0ng: +66 8 6332 9347 ID LINE b\u00e1n h\u00e0ng: @pttsales \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng d\u1ecbch v\u1ee5 24\/7: +66 8 9227 9154 ID LINE h\u1ed7 tr\u1ee3 d\u1ecbch v\u1ee5: @pttsupport Xem t\u1ea5t c\u1ea3 m\u00e1y m\u00f3c  <\/p>\n","protected":false},"author":3,"featured_media":7159,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[55],"tags":[59,60],"class_list":["post-7158","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bai-viet-ve-duc","tag-tuyen-chon","tag-trang-suc"],"yoast_head":"\nCo r\u00fat kim lo\u1ea1i trong qu\u00e1 tr\u00ecnh \u0111\u00fac trang s\u1ee9c - 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