| 查看: 1536 | 回复: 14 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
dearlucy铁虫 (小有名气)
|
[交流]
合金的理解 已有7人参与
|
||
| 大家好，我是刚开始接触合金，想请教大家一个问题，Mg-Zr-30合金中的30怎么理解，是指Zr的含量是30%吗？特向大家请教。。。。 |
回复此楼» 猜你喜欢
面上合作单位盖章
已经有9人回复
-
面上函评意见出来了，像什么等级？
已经有17人回复
-
为什么国自然不能直接公布
已经有5人回复
-
梦想
已经有7人回复
-
学科评审组评审是指会评吗？
已经有4人回复
-
为什么资助数各大高校都创新高，自己申请怎么就这么难
已经有14人回复
-
小白求助 投论文要求的highlights应该如何写
已经有4人回复
-
麻烦专家们看看评委们的意见（F口面上）
已经有12人回复
-
怎么看青基中了没有啊
已经有6人回复
-
国社科又开始会评了，不知道这次命运如何
已经有11人回复
dearlucy
铁虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 50.4
- 散金: 5
- 帖子: 139
- 在线: 36.5小时
- 虫号: 1132479
- 注册: 2010-10-26
- 性别: GG
- 专业: 金属功能材料
3楼2011-05-23 16:54:27
2楼2011-05-23 15:52:57
imrsfb
铁杆木虫 (著名写手)
- MM-EPI: 7
- 应助: 12 (小学生)
- 贵宾: 1.17
- 金币: 8106.6
- 散金: 2541
- 红花: 45
- 沙发: 3
- 帖子: 2477
- 在线: 580.8小时
- 虫号: 472279
- 注册: 2007-12-04
- 性别: GG
- 专业: 金属结构材料
★
小木虫(金币+0.5):给个红包，谢谢回帖
小木虫(金币+0.5):给个红包，谢谢回帖
|
The most commonly used magnesium alloys contain aluminum, zinc, and manganese; aluminum and zinc are added in ingot form, dissolving readily at normal melt temperature (ca. 700 oC). Manganese is added as the anhydrous chloride or as a hardener, for example, Al-5% Mn. The alloying elements are added at 720-750 oC; the alloy is homogenized and then cast. High-purity magnesium alloys such as AZ91D, AZ91E, and AM60B contain very low levels of the heavy-metal impurities nickel, iron, and copper, resulting in far better corrosion resistance than ordinary alloys. Iron is removed by saturating the melt with manganese at elevated temperature (700-750 oC) and then reducing the temperature, thus precipitating the iron in the form of an AlMnFe intermetallic compound. Mechanical properties of magnesium alloys improve as grain size is reduced. Carbon inoculation is used commonly to grain-refine aluminum-containing magnesium alloys, the inoculant being added at ca. 780 oC. Zirconium is frequently used to grain-refine alloys lacking aluminum. It is added as a Mg-Zr 30 % hardener above 750 oC. The mechanisms of grain refining are not fully understood, but several theories have been proposed. Both zirconium and magnesium have hexagonal crystal structures with similar lattice parameters, making zirconium an ideal nucleating particle for magnesium. http://www.magnesium.com/w3/data-bank/index.php?mgw=176 |
4楼2011-05-23 17:02:06
dearlucy
铁虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 50.4
- 散金: 5
- 帖子: 139
- 在线: 36.5小时
- 虫号: 1132479
- 注册: 2010-10-26
- 性别: GG
- 专业: 金属功能材料
5楼2011-05-24 10:26:22
20
投票:
