{"id":4490,"date":"2023-07-26T22:59:00","date_gmt":"2023-07-26T22:59:00","guid":{"rendered":"https:\/\/www.greenstone-tech.com\/?p=4490"},"modified":"2025-10-31T08:14:13","modified_gmt":"2025-10-31T08:14:13","slug":"pouziti-technologie-laseroveho-platovani-pri-zpevnovani-povrchu-laminarnich-chladicich-valcu","status":"publish","type":"post","link":"https:\/\/www.greenstone-tech.com\/cs\/application-of-laser-cladding-technology-in-strengthening-the-surface-of-laminar-cooling-rolls\/","title":{"rendered":"Pou\u017eit\u00ed technologie laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed p\u0159i zpev\u0148ov\u00e1n\u00ed povrchu lamin\u00e1rn\u00edch chladic\u00edch v\u00e1lc\u016f"},"content":{"rendered":"

Lamin\u00e1rn\u00ed chladic\u00ed v\u00e1lce jako kl\u00ed\u010dov\u00e9 za\u0159\u00edzen\u00ed lamin\u00e1rn\u00edho syst\u00e9mu v\u00e1lcov\u00e1n\u00ed za tepla jsou um\u00edst\u011bny mezi v\u00fdstupem z dokon\u010dovac\u00ed v\u00e1lcovny a nav\u00edjec\u00edm kotou\u010dem a hraj\u00ed kl\u00ed\u010dovou roli p\u0159i p\u0159eprav\u011b vysokoteplotn\u00ed p\u00e1sov\u00e9 oceli. Tyto v\u00e1lce pracuj\u00ed v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch, nep\u0159etr\u017eit\u011b pracuj\u00ed p\u0159i teplot\u00e1ch mezi 400 \u00b0C a 600 \u00b0C, jsou vystaveny tepeln\u00fdm r\u00e1z\u016fm od chladic\u00ed vody, st\u0159\u00eddav\u00e9mu zat\u00ed\u017een\u00ed a tlakov\u00fdm sil\u00e1m. V t\u011bchto extr\u00e9mn\u00edch podm\u00ednk\u00e1ch doch\u00e1z\u00ed \u010dasto k opot\u0159eben\u00ed, korozi a odlupov\u00e1n\u00ed povrchu tradi\u010dn\u00edch v\u00e1lc\u016f, co\u017e v\u00fdznamn\u011b ovliv\u0148uje efektivitu v\u00fdroby a kvalitu v\u00fdrobk\u016f.<\/p>\n\n\n\n

\"Lamin\u00e1rn\u00ed
Lamin\u00e1rn\u00ed chladic\u00ed v\u00e1lec<\/figcaption><\/figure>\n\n\n\n
Technologick\u00e1 \u00fazk\u00e1 m\u00edsta v tradi\u010dn\u00edch procesech<\/strong><\/h5>\n\n\n\n

Tradi\u010dn\u011b se p\u0159i v\u00fdrob\u011b lamin\u00e1rn\u00edch chladic\u00edch v\u00e1lc\u016f pou\u017e\u00edv\u00e1 plamenov\u00e9 st\u0159\u00edk\u00e1n\u00ed slitiny Ni60 a n\u00e1sledn\u00e9 induk\u010dn\u00ed p\u0159etaven\u00ed. Tento p\u0159\u00edstup m\u00e1 v\u0161ak zjevn\u00e1 omezen\u00ed:<\/p>\n\n\n\n

    \n
  • Nedostate\u010dn\u00e1 pevnost lepen\u00ed<\/strong>: Pevnost vazby mezi nast\u0159\u00edkanou vrstvou a podkladem je obvykle ni\u017e\u0161\u00ed ne\u017e 200 MPa, co\u017e vede k mo\u017enosti odlupov\u00e1n\u00ed povlaku b\u011bhem pou\u017e\u00edv\u00e1n\u00ed.<\/li>\n\n\n\n
  • V\u00fdrazn\u00e9 deformace a nerovnom\u011brn\u00e9 n\u00e1t\u011bry<\/strong>: Vysok\u00fd p\u0159\u00edkon tepla p\u0159i tradi\u010dn\u00edch procesech zp\u016fsobuje silnou deformaci obrobku s nerovnom\u011brnou mikrostrukturou povlaku, co\u017e m\u00e1 za n\u00e1sledek omezenou \u017eivotnost, kter\u00e1 nespl\u0148uje po\u017eadavky modern\u00ed kontinu\u00e1ln\u00ed v\u00fdroby.<\/li>\n<\/ul>\n\n\n\n
    \"Tradi\u010dn\u00ed
    Tradi\u010dn\u00ed v\u00fdroba lamin\u00e1rn\u00edch v\u00e1le\u010dk\u016f vyu\u017e\u00edv\u00e1 plamenov\u00e9 st\u0159\u00edk\u00e1n\u00ed Ni60 + induk\u010dn\u00ed p\u0159etavov\u00e1n\u00ed.<\/figcaption><\/figure>\n\n\n\n
    Pr\u016flomov\u00e9 v\u00fdhody technologie laserov\u00e9ho opl\u00e1\u0161t\u011bn\u00ed<\/strong><\/h5>\n\n\n\n

    Ve srovn\u00e1n\u00ed s tradi\u010dn\u00edmi technikami modifikace povrchu nab\u00edz\u00ed laserov\u00e9 pl\u00e1tov\u00e1n\u00ed v\u00fdznamn\u00e9 technick\u00e9 v\u00fdhody:<\/p>\n\n\n\n

    Pr\u016flom v metalurgick\u00e9 kvalit\u011b<\/strong><\/h6>\n\n\n\n

    Obkladov\u00e1 vrstva vytv\u00e1\u0159\u00ed \u00faplnou metalurgickou vazbu se substr\u00e1tem, p\u0159i\u010dem\u017e pevnost vazby dosahuje v\u00edce ne\u017e 85% pevnosti substr\u00e1tu. Rychl\u00e9 tuhnut\u00ed b\u011bhem procesu (rychlost ochlazov\u00e1n\u00ed 10^4-10^6 K\/s) vede ke vzniku jemn\u00fdch dendritick\u00fdch mikrostruktur, co\u017e v\u00fdrazn\u011b zvy\u0161uje hustotu povlaku.<\/p>\n\n\n\n

    P\u0159esn\u00e1 tepeln\u00e1 regulace<\/strong><\/h6>\n\n\n\n

    Laserov\u00e9 pl\u00e1tov\u00e1n\u00ed vyu\u017e\u00edv\u00e1 proces s n\u00edzk\u00fdm p\u0159\u00edkonem tepla, kter\u00fd p\u0159esn\u011b \u0159\u00edd\u00ed rychlost \u0159ed\u011bn\u00ed v rozmez\u00ed 3-8%. Tepeln\u011b ovlivn\u011bn\u00e1 z\u00f3na (HAZ) substr\u00e1tu z\u016fst\u00e1v\u00e1 men\u0161\u00ed ne\u017e 1 mm, co\u017e \u00fa\u010dinn\u011b zabra\u0148uje deformaci obrobku a zaji\u0161\u0165uje rozm\u011brovou stabilitu.<\/p>\n\n\n\n

    Inovativn\u00ed materi\u00e1lov\u00fd design<\/strong><\/h6>\n\n\n\n

    Spole\u010dnost Greenstone-Tech vyvinula specializovan\u00fd syst\u00e9m pr\u00e1\u0161kov\u00e9 slitiny p\u0159izp\u016fsoben\u00fd jedine\u010dn\u00fdm pracovn\u00edm podm\u00ednk\u00e1m lamin\u00e1rn\u00edch chladic\u00edch v\u00e1lc\u016f. Tento syst\u00e9m optimalizuje pom\u011br karbidotvorn\u00fdch prvk\u016f, jako je chrom, molybden a wolfram, aby se zv\u00fd\u0161ila odolnost proti opot\u0159eben\u00ed p\u0159i vysok\u00fdch teplot\u00e1ch a z\u00e1rove\u0148 se zachovala hou\u017eevnatost povlaku.<\/p>\n\n\n\n

    In\u017een\u00fdrsk\u00e1 praxe a ov\u011b\u0159ov\u00e1n\u00ed v\u00fdkonu<\/strong><\/h6>\n\n\n\n

    Na z\u00e1klad\u011b d\u016fkladn\u00e9ho v\u00fdzkumu mechanism\u016f poruch lamin\u00e1rn\u00edch chladic\u00edch v\u00e1lc\u016f vyvinula spole\u010dnost Greenstone-Tech vlastn\u00ed procesn\u00ed \u0159e\u0161en\u00ed:<\/p>\n\n\n\n

    Inovativn\u00ed za\u0159\u00edzen\u00ed a procesy<\/strong><\/h6>\n\n\n\n

    Vysokorychlostn\u00ed pl\u00e1tovac\u00ed za\u0159\u00edzen\u00ed \u0159ady ULC v kombinaci s koaxi\u00e1ln\u00edm syst\u00e9mem pod\u00e1v\u00e1n\u00ed pr\u00e1\u0161ku zaji\u0161\u0165uje p\u0159esnou kontrolu procesu pl\u00e1tov\u00e1n\u00ed. Optimalizac\u00ed kl\u00ed\u010dov\u00fdch parametr\u016f, jako je v\u00fdkon laseru (3-4 kW), rychlost skenov\u00e1n\u00ed (10-15 mm\/s) a rychlost pod\u00e1v\u00e1n\u00ed pr\u00e1\u0161ku (20-30 g\/min), je trvale udr\u017eov\u00e1na kvalita pl\u00e1tovac\u00ed vrstvy.<\/p>\n\n\n\n

    Dosa\u017een\u00e9 ukazatele v\u00fdkonnosti<\/strong><\/h6>\n\n\n\n

    Re\u00e1ln\u00e9 aplikace ukazuj\u00ed, \u017ee tlou\u0161\u0165ka pl\u00e1\u0161\u0165ov\u00e9 vrstvy z\u016fst\u00e1v\u00e1 stabiln\u00ed na 1,3 mm a tvrdost povrchu dosahuje 55-60 HRC. Dokonce i p\u0159i teplot\u011b 600 \u00b0C si povlak zachov\u00e1v\u00e1 vynikaj\u00edc\u00ed odolnost proti opot\u0159eben\u00ed, bez defekt\u016f, jako jsou p\u00f3ry nebo trhliny. \u017divotnost t\u011bchto v\u00e1lc\u016f v\u00edce ne\u017e t\u0159ikr\u00e1t p\u0159evy\u0161uje tradi\u010dn\u00ed postupy.<\/p>\n\n\n\n

    Syst\u00e9m kontroly kvality<\/strong><\/h6>\n\n\n\n

    Byl zaveden komplexn\u00ed proces kontroly kvality, kter\u00fd zahrnuje ultrazvukov\u00e9 zkou\u0161ky, anal\u00fdzu gradientu tvrdosti a metalografick\u00e9 vy\u0161et\u0159en\u00ed. T\u00edm je zaji\u0161t\u011bno, \u017ee ka\u017ed\u00fd opraven\u00fd v\u00e1lec spl\u0148uje stanoven\u00e9 technick\u00e9 normy. Pr\u016fmyslov\u00e9 ov\u011b\u0159en\u00ed potvrzuje, \u017ee tento proces prodlu\u017euje cyklus \u00fadr\u017eby lamin\u00e1rn\u00edch chladic\u00edch v\u00e1lc\u016f na 2,5kr\u00e1t del\u0161\u00ed ne\u017e tradi\u010dn\u00ed metody, co\u017e v\u00fdrazn\u011b zkracuje prostoje.<\/p>\n\n\n\n

    \"Zv\u011bt\u0161en\u00fd
    Zv\u011bt\u0161en\u00fd pohled na lok\u00e1ln\u00ed detaily lamin\u00e1rn\u00ed laserov\u00e9 vrstvy v\u00e1le\u010dk\u016f<\/figcaption><\/figure>\n\n\n\n
    Laserov\u00e9 pl\u00e1tov\u00e1n\u00ed vs. sva\u0159ov\u00e1n\u00ed plamenem<\/h6>\n\n\n\n

    Proces laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed:
    Obrobek \u2192 Odma\u0161\u0165ov\u00e1n\u00ed \u2192 Laserov\u00e9 pl\u00e1tov\u00e1n\u00ed \u2192 Dokon\u010dovac\u00ed pr\u00e1ce \u2192 Kontrola<\/p>\n\n\n\n

    Sva\u0159ov\u00e1n\u00ed plamenem:
    Obrobek \u2192 Odma\u0161\u0165ov\u00e1n\u00ed \u2192 P\u00edskov\u00e1n\u00ed \u2192 P\u0159edeh\u0159ev \u2192 Sva\u0159ov\u00e1n\u00ed st\u0159\u00edk\u00e1n\u00edm \u2192 P\u0159etavov\u00e1n\u00ed \u2192 Izolace \u2192 Dokon\u010dovac\u00ed pr\u00e1ce \u2192 Kontrola<\/p>\n\n\n\n

    Srovn\u00e1n\u00ed komplexn\u00edho v\u00fdkonu laserov\u00e9ho nava\u0159ov\u00e1n\u00ed a sva\u0159ov\u00e1n\u00ed plamenem<\/strong><\/p>\n\n\n\n

    V\u00fdkon<\/th>Laserov\u00e9 opl\u00e1\u0161t\u011bn\u00ed<\/th>Sva\u0159ov\u00e1n\u00ed plamenem<\/th><\/tr><\/thead>
    Pr\u016fb\u011bh procesu<\/strong><\/td>Jednoduch\u00e9, snadno ovladateln\u00e9<\/td>Slo\u017eit\u00e1, \u00fazk\u00e1 f\u00e1zov\u00e1 linie pevn\u00e1 l\u00e1tka-kapalina, obt\u00ed\u017en\u00e1 kontrola zrcadla<\/td><\/tr>
    Lepen\u00ed<\/strong><\/td>Metalurgick\u00e1 vazba<\/td>\u010c\u00e1ste\u010dn\u00e1 metalurgick\u00e1 vazba, n\u00e1chyln\u00e1 k odtr\u017een\u00ed<\/td><\/tr>
    Tvrdost (HRC)<\/strong><\/td>\u226555<\/td>\u226556<\/td><\/tr>
    V\u00fdkonnost n\u00e1t\u011bru<\/strong><\/td><\/td><\/td><\/tr>
    Odolnost proti opot\u0159eben\u00ed<\/td>Rychlost opot\u0159eben\u00ed k (mm\u00b3\/(N-m), 10-\u2075)<\/td>Rychlost opot\u0159eben\u00ed k (mm\u00b3\/(N-m), 10-\u2075)<\/td><\/tr>
    Odolnost proti korozi<\/td>Neutr\u00e1ln\u00ed soln\u00e1 mlha 1000h, stupe\u0148 10 nebo vy\u0161\u0161\u00ed<\/td>Neutr\u00e1ln\u00ed soln\u00e1 mlha 1000h, stupe\u0148 10 nebo vy\u0161\u0161\u00ed<\/td><\/tr>
    Pr\u00e1\u0161ek a vyu\u017eit\u00ed<\/strong><\/td>Pr\u00e1\u0161ek na b\u00e1zi \u017eeleza, 12 kg\/m\u00b2<\/td>Pr\u00e1\u0161ek na b\u00e1zi niklu, 13-14 kg\/m\u00b2<\/td><\/tr>
    \u017divotnost n\u00e1t\u011bru<\/strong><\/td>\u22652 roky, objem v\u00fdroby oceli \u22658 milion\u016f tun<\/td>1,5-2 roky<\/td><\/tr>
    Stabilita procesu<\/strong><\/td>Stabiln\u00ed proces, dobr\u00e1 opakovatelnost<\/td>Citliv\u00e9 na pr\u00e1\u0161ek, n\u00e1chyln\u00e9 k defekt\u016fm, jako jsou d\u00edrky.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    Technologick\u00fd v\u00fdhled<\/strong><\/h5>\n\n\n\n

    S rostouc\u00edm d\u016frazem na ekologickou v\u00fdrobu se technologie laserov\u00e9ho pl\u00e1tov\u00e1n\u00ed st\u00e1v\u00e1 preferovan\u00fdm \u0159e\u0161en\u00edm pro zpevn\u011bn\u00ed povrchu lamin\u00e1rn\u00edch chladic\u00edch v\u00e1lc\u016f d\u00edky sv\u00fdm v\u00fdjime\u010dn\u00fdm parametr\u016fm a ekologick\u00fdm v\u00fdhod\u00e1m. Spole\u010dnost Greenstone-Tech bude pokra\u010dovat v optimalizaci procesn\u00edch parametr\u016f, v\u00fdvoji nov\u00fdch slitinov\u00fdch materi\u00e1l\u016f a v podpo\u0159e rozs\u00e1hl\u00e9ho vyu\u017eit\u00ed t\u00e9to technologie p\u0159i kontinu\u00e1ln\u00edm v\u00e1lcov\u00e1n\u00ed za tepla a bude poskytovat technickou podporu p\u0159i modernizaci za\u0159\u00edzen\u00ed v ocel\u00e1\u0159sk\u00e9m pr\u016fmyslu.<\/p>","protected":false},"excerpt":{"rendered":"

    Laminar cooling rolls, as key equipment in the hot rolling laminar system, are positioned between the finishing mill exit and the coiler, playing a crucial role in transporting high-temperature strip steel. These rolls operate in harsh conditions, running continuously at temperatures between 400\u00b0C and 600\u00b0C, subjected to thermal shocks from cooling water, alternating loads, and […]<\/p>\n","protected":false},"author":1,"featured_media":4488,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,3],"tags":[103],"table_tags":[],"class_list":["post-4490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-cases","category-blog","tag-lydia-liu"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts\/4490","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=4490"}],"version-history":[{"count":3,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts\/4490\/revisions"}],"predecessor-version":[{"id":5358,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/posts\/4490\/revisions\/5358"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/media\/4488"}],"wp:attachment":[{"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/media?parent=4490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/categories?post=4490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/tags?post=4490"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/www.greenstone-tech.com\/cs\/wp-json\/wp\/v2\/table_tags?post=4490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}