{"id":4268,"date":"2019-02-18T02:28:53","date_gmt":"2019-02-18T02:28:53","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=4268"},"modified":"2019-02-18T02:33:26","modified_gmt":"2019-02-18T02:33:26","slug":"degassing-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/tr\/degassing-molten-aluminum\/","title":{"rendered":"Erimi\u015f Al\u00fcminyumun Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131"},"content":{"rendered":"

Erimi\u015f Al\u00fcminyumun Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131<\/strong><\/p>\n

Once the \u00c7EVR\u0130M\u0130\u00c7\u0130 GAZ G\u0130DERME \u00dcN\u0130TES\u0130<\/a> is fully lowered into Erimi\u015f Al\u00fcminyumun Gazdan Ar\u0131nd\u0131r\u0131lmas\u0131<\/strong> with the shaft in place, the degassing operation can begin. The best shaft location is slightly off the centerline of the crucible or ladle to help avoid vortex formation with its circular rotation in the liquid metal. An offset distance of 2-4 in. from the centerline is usually sufficient. The use of a baffle plate also is a good idea, because the baffle opposes the circulation movement of metal and reduces vortex formation.<\/p>\n

With the RID in the proper location, the unit should be turned on and the shaft speed should be set to 300 RPM. The inert gas flow also should be on and operators should then adjust the gas flow rate and shaft speed. Gas flow should be increased until see gas bubbles are visible as they float to the surface of the liquid metal. As the gas flow increases, the size of the bubbles should increase.<\/p>\n

The desired result is a good dispersion of small bubbles while maintaining a relatively quiet surface. When an optimal combination of flow rate and shaft rotation speed is found, note the parameters for future use. Also note the total degassing time, which normally falls somewhere between four and eight minutes, unless the temperatures are very high or the amount of gas needed is low.<\/p>\n

\"Erimi\u015f<\/p>\n

Classification of cast aluminum alloys.<\/strong>
\nHer bir d\u00f6k\u00fcm al\u00fcminyum ala\u015f\u0131m\u0131, \u00fc\u00e7\u00fcnc\u00fc ve d\u00f6rd\u00fcnc\u00fc basamaklar\u0131 ay\u0131ran bir ondal\u0131k nokta i\u00e7eren d\u00f6rt basamakl\u0131 bir say\u0131 ile tan\u0131mlan\u0131r.<\/p>\n

\u0130lk rakam, ana ala\u015f\u0131m elementine g\u00f6re ala\u015f\u0131m grubunu belirtir:<\/p>\n

1xx.x Al\u00fcminyum, en az 99.0%;<\/p>\n

2xx.x Bak\u0131r (4%\u20264.6%);<\/p>\n

Bak\u0131r ve\/veya magnezyum ilaveli 3xx.x Silikon (5%\u202617%);<\/p>\n

4xx.x Silikon (5%\u202612%);<\/p>\n

5xx.x Magnezyum (4%\u202610%);<\/p>\n

7xx.x \u00c7inko (6.2%\u20267.5%);<\/p>\n

8xx.x Kalay;<\/p>\n

9xx.x Di\u011ferleri.<\/p>\n

The second two digits identify aluminum alloy or indicate the alloy purity.<\/p>\n

In the alloys of the 1xx.x series the second two digits indicate the level of purity of the alloy \u2013 they are the same as the two digits to the right of the decimal point in the minimum concentration of aluminum (in percents): 150.0 means minimum 99.50% of aluminum in the alloy, 120.1 means minimum 99.20% of aluminum in the alloy.<\/p>\n

In all other groups of aluminum alloys (2xx.x through 9xx.x) the second two digits signify different alloys in the group.<\/p>\n

The last digit indicates the product form: casting (designated by \u201c0\u201d) or ingot (designated by \u201c1\u201d or \u201c2\u201d depending on chemical composition limits.)<\/p>\n

A modification of the original alloy or impurity limits is indicated by a serial letter before the numerical designation. The serial letters are assigned in alphabetical order starting with A but omitting I, O, Q, and X (the letter \u201cX\u201d is reserved for experimental alloys).<\/p>","protected":false},"excerpt":{"rendered":"

Degassing Molten Aluminum Once the ONLINE DEGASSING UNIT is fully lowered into Degassing Molten Aluminum with the shaft in place, the degassing operation can begin. The best shaft location is slightly off the centerline of the crucible or ladle to help avoid vortex formation with…<\/p>","protected":false},"author":1,"featured_media":4269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[8979,8984,8995,8987,8991,8993,8992,8986,8994,8971,8989,8990,8988,8973,9007,9009,9005,9006,9008,8999,8997,9001,9000,8996,8998,9004,9003,9002,8972,8969,8968,8976,8975,8974,8977],"yoast_head":"\nDegassing Molten Aluminum - AdTech Metallurgical Materials Co.,Ltd.<\/title>\n<meta name=\"description\" content=\"Once the rotary degassing unit is fully lowered into Degassing Molten Aluminum with the shaft in place, the degassing operation can begin.\" \/>\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.adtechamm.com\/tr\/degassing-molten-aluminum\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Degassing Molten Aluminum - 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