双金属耐磨管耐性开裂有不同的表现方式 |
添加时间:2019/12/20 16:23:49 浏览次数: |
在双金属耐磨管塑性加工的出产实践中,特虽是在出产低塑性的钢与合金时,常常会发现在钢材的外表或部现现开裂.从断口的开裂特征来看有两种状况。 In the production practice of bimetal wear-resistant pipe plastic processing, especially in the production of low plastic steel and alloy, it is often found that there are cracks on the surface or part of the steel. There are two conditions from the fracture characteristics. 在开裂前双金属耐磨管经受了较大的塑性变形,其断口呈纤维状,暗淡无光,耐性开裂主要是穿晶开裂,如果晶界处有夹杂物或沉淀物集合,则也会发作晶间开裂。 Before the cracking, the bimetal wear-resistant tube has undergone a large plastic deformation, and its fracture is fibrous and dull. The resistance cracking is mainly transgranular cracking. If there are inclusions or precipitates at the grain boundary, intergranular cracking will also occur. 双金属耐磨管耐性开裂有不同的表现方式:一种是切变开裂,例如密排六方金属单晶体沿基面作很多滑移后就会发作这种方式的开裂,其开裂面就是滑移面,另一种是试样在塑性变形后出现缩颈,一些塑性非常好的资料,如金,铅和铝,能够拉缩成一个点才断开,对于一般的耐性金属,开裂则由试样中心开端,断开构成杯锥状断口。 There are different ways to show the resistance cracking of bimetal wear-resistant tubes: one is shear cracking, for example, the cracking surface of dense hexagonal metal single crystal will occur after a lot of sliding along the base surface, and the other is that the specimen necks after plastic deformation. Some very good plastic materials, such as gold, lead and aluminum, can be pulled to a point before breaking, For general resistant metals, the crack starts from the center of the specimen and breaks to form a cup cone fracture. |
上一页 超低摩阻耐磨复合管管道和管件采用耐振快装法兰连接 |
下一页 双金属复合管兼有基层和复层的所有优点 |
Copyright © 技术支持:遨游网络