{"id":2187,"date":"2021-07-20T14:22:17","date_gmt":"2021-07-20T14:22:17","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2187"},"modified":"2021-07-20T14:22:17","modified_gmt":"2021-07-20T14:22:17","slug":"austenitic-heat-resistant-stainless-steel","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/nl\/austenitic-heat-resistant-stainless-steel\/","title":{"rendered":"Austenitische hittebestendige roestvrij staal"},"content":{"rendered":"<p>Roestvrijstalen platen van 309 en 310 zijn austenitische staalsoorten die bestand zijn tegen hitte en gekenmerkt worden door een hoog gehalte aan Cr en Ni. 309S en 310S zijn respectievelijk de lage-koolstofversies ervan. In oxiderende media hebben ze beide uitstekende corrosieweerstand en hoge temperatuurbestendigheid. Bij kamertemperatuur heeft de matrixmicrostructuur van austenitisch roestvrij staal 310 een zuivere \u03b3-structuur. 310 staat ook wel bekend als \u201c2520 roestvrij staal\u201d omdat het respectievelijk 25% chromium en 20% nikkel bevat. 310S en 309S oxideren niet gemakkelijk bij hoge temperaturen en worden vaak gebruikt als hoogtemperatuurbestendige kwaliteiten. De experimentele resultaten laten zien dat de oxidatiegraad van 310 langzamer is bij temperaturen onder 1000\u00b0C. Terwijl de temperatuur blijft stijgen tot 1200 \u2103, versnelt de oxidatiegraad van 310 snel. Bovendien worden ze ook gebruikt bij het transport en de opslag van sterke zuren zoals zuurzuur met een concentratie van 65% ~ 85%.<\/p>\n<p>&nbsp;<\/p>\n<p>Alternatief materiaal in andere normen:<\/p>\n<p>JIS G4303 SUS 309S, SUS 310S<\/p>\n<p>EN 10088-1 X12CrNi23-13\/ 1.4833, X15CrNiSi25-21\/ 1.4841, X8CrNi25-21\/ 1.4845<\/p>\n<p>&nbsp;<\/p>\n<p>Chemische samenstelling<\/p>\n<table>\n<tbody>\n<tr>\n<td>ASTM<\/td>\n<td>309<\/td>\n<td>309S<\/td>\n<td>310<\/td>\n<td>310S<\/td>\n<\/tr>\n<tr>\n<td>C<\/td>\n<td>\u22640.20<\/td>\n<td>\u22640.08<\/td>\n<td>\u22640.25<\/td>\n<td>\u22640.08<\/td>\n<\/tr>\n<tr>\n<td>Si<\/td>\n<td>\u22641.00<\/td>\n<td>\u22641.00<\/td>\n<td>\u22641.50<\/td>\n<td>\u22641.50<\/td>\n<\/tr>\n<tr>\n<td>Mn<\/td>\n<td>\u22642.00<\/td>\n<td>\u22642.00<\/td>\n<td>\u22642.00<\/td>\n<td>\u22642.00<\/td>\n<\/tr>\n<tr>\n<td>P<\/td>\n<td>\u22640.045<\/td>\n<td>\u22640.045<\/td>\n<td>\u22640.045<\/td>\n<td>\u22640.045<\/td>\n<\/tr>\n<tr>\n<td>S<\/td>\n<td>\u22640.030<\/td>\n<td>\u22640.030<\/td>\n<td>\u22640.030<\/td>\n<td>\u22640.030<\/td>\n<\/tr>\n<tr>\n<td>Cr<\/td>\n<td>22.00~24.00<\/td>\n<td>22.00~24.00<\/td>\n<td>24.00~26.00<\/td>\n<td>24.00~26.00<\/td>\n<\/tr>\n<tr>\n<td>Ni<\/td>\n<td>12.00~15.00<\/td>\n<td>12.00~15.00<\/td>\n<td>19.00~22.00<\/td>\n<td>19.00~22.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Bij hoge temperatuur kunnen 310 roestvrij staal met hoge hittebestendigheid de prestaties stabiel houden en zijn het niet gemakkelijk om door buitenafwerking te worden aangetast of geoxideerd. Dit komt voornamelijk door het hoge Cr-gehalte in 310 roestvrij staal zelf. Metaal-Cr kan samenwerken met zuurstof om een Cr2O3-oxidefilm te vormen die de oppervlakte van 310 staal constant bedekt tot het geheel is verpakt, wat overeenkomt met 310 staal dat op \u201cbeschermende kleding\u201d wordt geplaatst, waardoor de interne contactpunten van 310 metaal met de buitenwereld worden voorkomen. Dit is de belangrijkste reden waarom 310 staal bij hoge temperaturen een goede oxidatiebestendigheid heeft.<\/p>\n<p>Voor hittebestendig roestvrij staal is het chroom (Cr)-element stabiel bij hoge temperaturen, ontstaat er geen oxidatie en vallen de korsten niet af. Het Cr-gehalte mag echter niet te hoog zijn, anders neemt ook de taaiheid van het roestvrij staal af, omdat Cr kan bijdragen aan de vorming van de \u03b1-compositie en de \u03b3-compositie remt. Te veel \u03b1 kan gemakkelijk leiden tot de vorming van een breekbare fase. Daarom hopen we in austenitisch roestvrij staal dat het Cr-gehalte gematigd blijft, wat niet alleen de prestaties van het materiaal in alle aspecten garandeert, maar ook voorkomt dat bepaalde breekbare fasen ontstaan.<\/p>\n<p>Nikkel is een zeer belangrijk element in het hittebestendige austenitische roestvrij staal en speelt een actieve rol bij het bevorderen van de vorming van \u03b3. Een toename van het Ni-gehalte kan ervoor zorgen dat de overgangstemperatuur van \u03b3 naar \u03b1-fase erg laag wordt, waardoor de stabiliteit van de austenietmatrix kan worden verbeterd. Bovendien kan een geschikte hoeveelheid Ni duidelijk verbeteren van de algemene mechanische eigenschappen en de goede laseigenschappen van roestvrij staal.<\/p>","protected":false},"excerpt":{"rendered":"<p>309 and 310 stainless sheets of steel are heat-resistant austenitic steels characterized by high Cr and Ni content. 309S and 310S are their low carbon versions respectively. In oxidizing media, they both have excellent corrosion resistance and high-temperature strength. At room temperature, the matrix microstructure of austenitic stainless steel 310 is pure \u03b3. 310 is [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2187","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"309S and 310S are their low carbon versions respectively. 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