Study of particle erosion damage in Haynes Stellite 6B I: Scanning electron microscopy of eroded surfaces
Study of particle erosion damage in Haynes Stellite 6B I: Scanning electron microscopy of eroded surfaces
复制标题
Haynes Stellite 6B I 中颗粒侵蚀损伤的研究：侵蚀表面的扫描电子显微镜
DOI：
10.1016/0043-1648(78)90143-6
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发表时间：
1978
期刊：
影响因子：
5
通讯作者：
I. Wright
中科院分区：
文献类型：
--
作者：
J. W. Edington;I. Wright
由于目前正在进行的煤转化和由此产生的含尘气体的努力，金属和合金在相对缓慢移动的气体中所携带的固体颗粒的侵蚀行为引起了人们的兴趣。海恩斯钨铬钴合金6B代表了在这种情况下用于耐冲蚀磨损的典型合金，也为研究冲蚀机制提供了合适的合金，因为它在延性基体中基本上包含大的脆性碳化物相。对Stellite 6B表面受氧化铝颗粒侵蚀后的扫描电镜形貌进行了研究，分析了韧性金属基体和脆性碳化物的侵蚀损伤类型。可锻铸金属材料损失的唯一机制是切削，也可能涉及到极细尺度的断裂。材料从碳化物中脱除的机理是表面裂纹的联动。在研究的条件下，发现被腐蚀的氧化铝颗粒的角落破裂并附着在合金或碳化物表面；在研究的最高冲击速度下，在合金表面形成了一层广泛的嵌埋氧化铝碎片，这可能改变了合金的侵蚀行为。
The erosion behavior of metals and alloys by solid particles entrained in relatively slow moving gases is of current interest as a result of ongoing efforts in coal conversion and the consequent production of dust-laden gases. Haynes Stellite 6B represents a typical alloy used for erosive wear resistance in such situations and also provides an appropriate alloy for the study of the mechanisms of erosion because it comprises essentially large brittle carbide phases in a ductile matrix. A scanning electron microscope study of the surface of Stellite 6B after erosion by alumina particles is described, and the types of erosion damage incurred by the ductile metal matrix and the brittle carbides are characterized. The only mechanism of material loss of the ductile metal for which positive evidence was found was cutting, with the possibility that fracture on a very fine scale may also be involved. The mechanism of material removal from the carbides appeared to be by surface crack interlinkage. Under the conditions studied, corners of the eroding alumina particles were found to break off and to adhere to the alloy or carbide surface; at the highest impact velocity studied an extensive layer of embedded alumina fragments was built up on the alloy surface and probably modified its erosion behavior.