Vysokorychlostn\u00ed laserov\u00e9 pl\u00e1tov\u00e1n\u00ed jako pokro\u010dil\u00e1 technologie povrchov\u00e9ho in\u017een\u00fdrstv\u00ed nab\u00edz\u00ed v\u00fdznamn\u00e9 v\u00fdhody p\u0159i zlep\u0161ov\u00e1n\u00ed vlastnost\u00ed materi\u00e1l\u016f a oprav\u00e1ch po\u0161kozen\u00fdch sou\u010d\u00e1st\u00ed. Vzhledem ke slo\u017eitosti procesn\u00edch parametr\u016f a m\u011bn\u00edc\u00edm se faktor\u016fm prost\u0159ed\u00ed se v\u0161ak vysokorychlostn\u00ed laserov\u00e9 pl\u00e1tov\u00e1n\u00ed m\u016f\u017ee v praktick\u00fdch aplikac\u00edch setkat s r\u016fzn\u00fdmi probl\u00e9my s kvalitou. Tento \u010dl\u00e1nek systematicky rozeb\u00edr\u00e1 b\u011b\u017en\u00e9 probl\u00e9my a jejich p\u0159\u00ed\u010diny p\u0159i vysokorychlostn\u00edm laserov\u00e9m pl\u00e1tov\u00e1n\u00ed a poskytuje poznatky pro optimalizaci procesu.<\/p>\n\n\n\n
P\u0159i vysokorychlostn\u00edm laserov\u00e9m pl\u00e1tov\u00e1n\u00ed m\u00e1 kvalita vazby mezi povlakem a substr\u00e1tem p\u0159\u00edm\u00fd vliv na provozn\u00ed vlastnosti. N\u00ed\u017ee jsou uvedeny typick\u00e9 vady souvisej\u00edc\u00ed s lepen\u00edm:<\/p>\n\n\n\n
Odlupov\u00e1n\u00edm se rozum\u00ed odd\u011blov\u00e1n\u00ed povlaku od povrchu podkladu. Hlavn\u00ed p\u0159\u00ed\u010dinou je, \u017ee se na podkladu nevytvo\u0159ila \u00fa\u010dinn\u00e1 tavenina, co\u017e vedlo ke \u0161patn\u00e9mu metalurgick\u00e9mu spojen\u00ed mezi pr\u00e1\u0161kem a podkladem. P\u0159i vysokorychlostn\u00edm laserov\u00e9m pl\u00e1tov\u00e1n\u00ed mohou n\u00edzk\u00fd v\u00fdkon, nadm\u011brn\u00e9 mno\u017estv\u00ed pr\u00e1\u0161ku a vysok\u00e1 rychlost skenov\u00e1n\u00ed br\u00e1nit vytvo\u0159en\u00ed baz\u00e9nu taveniny. Krom\u011b toho m\u016f\u017ee spr\u00e1vn\u00e9mu spojen\u00ed br\u00e1nit tak\u00e9 zne\u010di\u0161t\u011bn\u00ed, jako je olej nebo galvanick\u00e9 vrstvy na povrchu obrobku.<\/p>\n\n\n\n
Trhliny jsou b\u011b\u017enou vadou vysokorychlostn\u00edch laserov\u00fdch pl\u00e1t\u016f, kter\u00e1 \u010dasto souvis\u00ed s koncentrac\u00ed tepeln\u00e9ho nap\u011bt\u00ed a nesouladem materi\u00e1l\u016f. Trhliny se s v\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed objevuj\u00ed, kdy\u017e m\u00e1 substr\u00e1t vysokou tvrdost (nap\u0159. po kalen\u00ed nebo nauhli\u010dov\u00e1n\u00ed), \u00fanavov\u00e9 vrstvy nebo kdy\u017e m\u00e1 pr\u00e1\u0161ek vysokou tvrdost a velkou m\u00edru smr\u0161t\u011bn\u00ed. Citlivost na trhliny je obzvl\u00e1\u0161t\u011b vysok\u00e1 p\u0159i pou\u017eit\u00ed pr\u00e1\u0161k\u016f na b\u00e1zi niklu nebo p\u0159i v\u00edcevrstv\u00e9m laserov\u00e9m pl\u00e1tov\u00e1n\u00ed.<\/p>\n\n\n\n
P\u00f3rovitost v\u00fdrazn\u011b sni\u017euje hustotu povlaku a jeho odolnost proti korozi. U vysokorychlostn\u00edho laserov\u00e9ho pokovov\u00e1n\u00ed jsou p\u0159\u00ed\u010diny p\u00f3rovitosti r\u016fzn\u00e9, v\u010detn\u011b rzi nebo oleje na substr\u00e1tu, ne\u010distot nebo vlhkosti v pr\u00e1\u0161ku, nestabiln\u00edho toku pr\u00e1\u0161ku, nadm\u011brn\u00e9ho mno\u017estv\u00ed pr\u00e1\u0161ku, nedostate\u010dn\u00e9ho v\u00fdkonu nebo vysok\u00e9 rychlosti skenov\u00e1n\u00ed.<\/p>\n\n\n\n
Tento probl\u00e9m v\u00e1\u017en\u011b ovliv\u0148uje kvalitu povrchu po vysokorychlostn\u00edm laserov\u00e9m pl\u00e1tov\u00e1n\u00ed. M\u016f\u017ee b\u00fdt zp\u016fsoben nadm\u011brn\u00fdm mno\u017estv\u00edm pr\u00e1\u0161ku, n\u00edzk\u00fdm v\u00fdkonem, vysokou rychlost\u00ed skenov\u00e1n\u00ed, vysokou v\u00fd\u0161kou trysky, malou velikost\u00ed laserov\u00e9ho bodu nebo kontaminac\u00ed optick\u00fdch \u010do\u010dek, co\u017e zp\u016fsobuje ne\u00fapln\u00e9 roztaven\u00ed pr\u00e1\u0161ku a \u0161patn\u00e9 sm\u00e1\u010den\u00ed.<\/p>\n\n\n\n
P\u0159\u00ed\u010dinou vzniku d\u016flk\u016f je obvykle ne\u00fapln\u00e9 roztaven\u00ed pr\u00e1\u0161ku nebo nedostate\u010dn\u00e9 roztaven\u00ed. Tento probl\u00e9m je b\u011b\u017en\u00fd u proces\u016f s n\u00edzk\u00fdm v\u00fdkonem, nadm\u011brn\u00fdm mno\u017estv\u00edm pr\u00e1\u0161ku nebo vysokou rychlost\u00ed skenov\u00e1n\u00ed, co\u017e jsou typick\u00e9 projevy \u0161patn\u00e9ho slad\u011bn\u00ed energie a pr\u00e1\u0161ku p\u0159i vysokorychlostn\u00edm laserov\u00e9m pl\u00e1tov\u00e1n\u00ed.<\/p>\n\n\n\n
Tyto morfologick\u00e9 vady obvykle souvisej\u00ed s p\u0159eh\u0159\u00e1t\u00fdm baz\u00e9nem taveniny a vyskytuj\u00ed se sp\u00ed\u0161e p\u0159i p\u0159\u00edli\u0161 vysok\u00e9m v\u00fdkonu, p\u0159\u00edli\u0161 vysok\u00e9 teplot\u011b baz\u00e9nu taveniny nebo p\u0159i nadm\u011brn\u00e9m zkapaln\u011bn\u00ed pr\u00e1\u0161ku. To m\u016f\u017ee ovlivnit vzhled a rozm\u011brovou p\u0159esnost vysokorychlostn\u00edho laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed d\u00edlu.<\/p>\n\n\n\n
P\u0159ilnut\u00ed pr\u00e1\u0161ku k trysce m\u016f\u017ee naru\u0161it tok pr\u00e1\u0161ku a ovlivnit stabilitu vysokorychlostn\u00edho laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed. Mezi p\u0159\u00ed\u010diny pat\u0159\u00ed nadm\u011brn\u00fd v\u00fdron pr\u00e1\u0161ku, zv\u00fd\u0161en\u00e1 teplota trysky, mal\u00e1 pracovn\u00ed vzd\u00e1lenost trysky nebo drsn\u00fd \u010di zne\u010di\u0161t\u011bn\u00fd povrch trysky. Spr\u00e1vn\u00e9 odsazen\u00ed pl\u00e1tovac\u00ed hlavy m\u016f\u017ee pomoci tento probl\u00e9m zm\u00edrnit.<\/p>\n\n\n\n
Ucp\u00e1n\u00ed pr\u00e1\u0161kem p\u0159\u00edmo p\u0159eru\u0161uje vysokorychlostn\u00ed laserov\u00fd proces pl\u00e1tov\u00e1n\u00ed. Mezi b\u011b\u017en\u00e9 p\u0159\u00ed\u010diny pat\u0159\u00ed opo\u017ed\u011bn\u00e9 \u010di\u0161t\u011bn\u00ed nalepen\u00e9ho pr\u00e1\u0161ku, \u0161patn\u00e1 tekutost pr\u00e1\u0161ku, vlhkost nebo ne\u010distoty v pr\u00e1\u0161ku a nerovnom\u011brn\u00e9 rozlo\u017een\u00ed pr\u00e1\u0161ku v syst\u00e9mech s v\u00edce p\u0159\u00edvody.<\/p>\n\n\n\n
Abnorm\u00e1ln\u00ed hluk b\u011bhem procesu opl\u00e1\u0161\u0165ov\u00e1n\u00ed \u010dasto signalizuje probl\u00e9m v procesu. M\u016f\u017ee b\u00fdt zp\u016fsoben kontaminac\u00ed pr\u00e1\u0161kem, vlhkost\u00ed nebo zne\u010di\u0161t\u011bn\u00fdm podkladem. Vysok\u00e1 hustota v\u00fdkonu m\u016f\u017ee v\u00e9st k odpa\u0159ov\u00e1n\u00ed kovu v baz\u00e9nu taveniny, co\u017e zp\u016fsobuje hluk a ovliv\u0148uje korozn\u00ed odolnost laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed.<\/p>\n\n\n\n
Siln\u00e9 rozst\u0159ikov\u00e1n\u00ed jisker m\u016f\u017ee ohrozit bezpe\u010dnost procesu a kvalitu povlaku. Obvykle k n\u011bmu doch\u00e1z\u00ed p\u0159i p\u0159\u00edli\u0161 vysok\u00e9 rychlosti sn\u00edm\u00e1n\u00ed, p\u0159\u00edli\u0161 vysok\u00e9 hustot\u011b v\u00fdkonu, nesouladu v\u00fdkonu a pod\u00e1v\u00e1n\u00ed pr\u00e1\u0161ku nebo p\u0159i p\u0159\u00edli\u0161 velk\u00e9m pr\u016ftoku plynu, kter\u00fd p\u0159edstavuje nadm\u011brn\u00fd p\u0159\u00edkon energie v procesu vysokorychlostn\u00edho laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed.<\/p>\n\n\n\n
Stabiln\u00ed tok pr\u00e1\u0161ku je nezbytn\u00fd pro dosa\u017een\u00ed rovnom\u011brn\u00e9ho vysokorychlostn\u00edho laserov\u00e9ho pokovov\u00e1n\u00ed. Nestabilita toku pr\u00e1\u0161ku je \u010dasto zp\u016fsobena opot\u0159ebovan\u00fdmi \u0161krabkami, ucpan\u00fdmi kan\u00e1ly pro pod\u00e1v\u00e1n\u00ed pr\u00e1\u0161ku, nedostate\u010dn\u00fdm pr\u016ftokem plynu, \u0161patn\u00fdm t\u011bsn\u011bn\u00edm podava\u010de pr\u00e1\u0161ku nebo \u00fanikem vzduchu v potrub\u00ed pro pod\u00e1v\u00e1n\u00ed pr\u00e1\u0161ku.<\/p>\n\n\n\n
Sn\u00ed\u017een\u00e1 \u00fa\u010dinnost znamen\u00e1 zhor\u0161en\u00ed stavu syst\u00e9mu. Mezi mo\u017en\u00e9 p\u0159\u00ed\u010diny pat\u0159\u00ed zne\u010di\u0161t\u011bn\u00ed ochrann\u00fdch \u010do\u010dek, opot\u0159ebovan\u00e9 \u0161krabky, nespr\u00e1vn\u00e1 pracovn\u00ed vzd\u00e1lenost, opot\u0159ebovan\u00e9 otvory pro pr\u00e1\u0161ek zp\u016fsobuj\u00edc\u00ed jeho hrub\u0161\u00ed tok nebo sn\u00ed\u017een\u00ed v\u00fdkonu laseru.<\/p>\n\n\n\n
Vysokorychlostn\u00ed laserov\u00e9 pl\u00e1tov\u00e1n\u00ed je technologie, kter\u00e1 vy\u017eaduje p\u0159esnou kontrolu procesn\u00edch parametr\u016f. V\u00fdskyt v\u00fd\u0161e zm\u00edn\u011bn\u00fdch probl\u00e9m\u016f \u010dasto \u00fazce souvis\u00ed se slad\u011bn\u00edm parametr\u016f, stavem za\u0159\u00edzen\u00ed a \u0159\u00edzen\u00edm materi\u00e1lu. Systematick\u00e9 pochopen\u00ed p\u0159\u00ed\u010din t\u011bchto vad je z\u00e1sadn\u00ed pro dosa\u017een\u00ed vysok\u00e9 kvality vysokorychlostn\u00edho laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed a roz\u0161\u00ed\u0159en\u00ed jeho pou\u017eit\u00ed. Pr\u016fb\u011b\u017enou optimalizac\u00ed procesu a pos\u00edlen\u00edm monitorov\u00e1n\u00ed procesu lze \u00fa\u010dinn\u011b zlep\u0161it stabilitu a v\u00fdt\u011b\u017enost vysokorychlostn\u00edho laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
High-speed laser cladding, as an advanced surface engineering technology, offers significant advantages in improving material properties and repairing damaged components. However, due to the complexity of process parameters and changing environmental factors, high-speed laser cladding can encounter various quality issues in practical applications. This article systematically reviews the common issues and causes in high-speed laser […]<\/p>\n","protected":false},"author":1,"featured_media":4740,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,3],"tags":[103],"table_tags":[],"class_list":["post-4750","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-professional-knowledge","category-blog","tag-lydia-liu"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts\/4750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/comments?post=4750"}],"version-history":[{"count":2,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts\/4750\/revisions"}],"predecessor-version":[{"id":5054,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts\/4750\/revisions\/5054"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/media\/4740"}],"wp:attachment":[{"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/media?parent=4750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/categories?post=4750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/tags?post=4750"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/table_tags?post=4750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}