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首页> 外文期刊>Materials transactions >Fabrication of Cr/Steel Graded-Boundary Material by Laser Beam and Electron Beam
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Fabrication of Cr/Steel Graded-Boundary Material by Laser Beam and Electron Beam

机译：激光束和电子束制备Cr /钢梯度边界材料

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With the purpose of developing thick metal/metal graded-boundary materials, the fabrication experiment of Cr/Steel graded-boundary materials was carried out using a laser beam and an electron beam. In order to produce a compositionally graded boundary region between the substrate steel and the added Cr metal, a series of surface alloying treatments were performed with both a CO_2 laser beam and an electron beam. A Cr sheet was placed on a commercial low carbon steel, and then a CO_2 laser beam was irradiated on the surface to produce a homogeneous alloyed layer. On this first surface-alloyed layer, another Cr sheet was placed and then the CO_2 laser beam was used again to produce a second surface-alloyed layer. Four sequential repetitions of the laser surface alloying treatment resulted in a compositionally graded region with about a 2 mm thickness from 60 percent Cr and 40 percent Fe in the surface region to 0 percent Cr and 99 percent Fe in the substrate. Similar procedures were carried out by an electron beam surface alloying treatment to produce Cr/Steel graded-boundary material. Four sequential surface-alloying treatments resulted in a compositionally graded region with a thickness of about 1 mm from 60 percent Cr and 40 percent Fe in the surface region to 0 percent Cr and 99 percent Fe in the substrate. In both cases, no visible root porosities were found in the graded-boundary region. Since the structures of both the high Cr graded-boundary region and the substrate were both BCC, there was almost no volume change and thus no appreciable cracks were formed in the boundary region between the alloyed layers and the substrate even after rapid cooling.
机译：为了开发厚金属/金属梯度边界材料，使用激光束和电子束进行了Cr /钢梯度边界材料的制造实验。为了在基体钢和添加的Cr金属之间产生成分渐变的边界区域，用CO_2激光束和电子束进行了一系列表面合金化处理。将Cr薄板放置在市售的低碳钢上，然后将CO_2激光束照射在表面上以产生均匀的合金层。在该第一表面合金层上，放置另一个Cr片，然后再次使用CO 2激光束产生第二表面合金层。激光表面合金化处理的四个顺序重复导致组成渐变的区域具有约2 mm的厚度，从表面区域的60％Cr和40％Fe到基材中的0％Cr和99％Fe。通过电子束表面合金化处理进行类似的程序，以生产Cr / Steel梯度边界材料。四个顺序的表面合金化处理形成了一个成分渐变的区域，其厚度从表面区域的60％Cr和40％Fe到基材中的0％Cr和99％Fe约为1毫米。在这两种情况下，在渐变边界区域均未发现可见的根部孔隙。由于高Cr梯度边界区域和基底的结构均为BCC，因此几乎没有体积变化，因此即使在快速冷却后，在合金层和基底之间的边界区域也没有形成明显的裂纹。

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