当前位置: X-MOL 学术Mater. Sci. Eng. A › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of crystal orientation on inner surface roughness of micro metal tubes in hollow sinking
Materials Science and Engineering: A ( IF 6.4 ) Pub Date : 2021-01-18 , DOI: 10.1016/j.msea.2021.140792
Takuma Kishimoto , Saki Suematsu , Hayate Sakaguchi , Kenichi Tashima , Satoshi Kajino , Shiori Gondo , Shinsuke Suzuki

The crystal deformation behavior of the micro tube was investigated to clarify the crystal orientation, which suppressed the development of the inner surface roughness during the hollow sinking. Stainless steel tubes with an outer diameter of 1.50 mm and a wall thickness of 0.045 mm were drawn without an inner tool. The inner surface roughness and crystal orientation were examined using the same measurement area. The results indicate that the crystal grains with the {102} crystal planes vertical to the normal to the drawing direction (ND) suppressed the increase in the height of the unevenness of the surrounding crystal grains, including themselves. The height deviation of the unevenness was larger upon the increase of the wall thickness than upon its decrease. Meanwhile, the number of crystal grains with the {102} crystal plane vertical to ND was larger with decreasing wall thickness than with increasing wall thickness. Therefore, it was considered that this crystal orientation of the grains suppressed the development of the inner surface roughness during the hollow sinking. The development of the inner surface roughness was suppressed with decreasing wall thickness because the crystal grain rotated so that the normal direction of {102} crystal plane was parallel to the ND: meanwhile the tensile and compressive stresses were applied to the tube in the drawing and transversal directions, respectively.



中文翻译:

晶体取向对中空沉微金属管内表面粗糙度的影响

研究了微管的晶体变形行为,以弄清晶体取向,从而抑制了中空下沉过程中内表面粗糙度的发展。在没有内部工具的情况下绘制了外径为1.50 mm,壁厚为0.045 mm的不锈钢管。使用相同的测量面积检查内表面粗糙度和晶体取向。结果表明,具有{102}晶面垂直于拉伸方向(ND)的法线的晶粒抑制了周围晶粒(包括其自身)的不平坦高度的增加。凹凸的高度偏差随着壁厚的增加而比其减小时的大。与此同时,与壁厚增加相比,{102}晶面垂直于ND的晶粒数目更大。因此,认为晶粒的这种晶体取向抑制了中空下沉期间内表面粗糙度的发展。内壁粗糙度的减小通过壁厚的减小而得到抑制,因为晶粒旋转使得{102}晶面的法线方向与ND平行:同时在图中向管施加了拉应力和压应力,并且横向方向。据认为,晶粒的这种晶体取向抑制了中空下沉期间内表面粗糙度的发展。内壁粗糙度的减小通过壁厚的减小而得到抑制,因为晶粒旋转使得{102}晶面的法线方向与ND平行:同时在图中向管施加了拉应力和压应力,并且横向方向。据认为,晶粒的这种晶体取向抑制了中空下沉期间内表面粗糙度的发展。内壁粗糙度的减小通过壁厚的减小而得到抑制,因为晶粒旋转使得{102}晶面的法线方向与ND平行:同时在图中向管施加了拉应力和压应力,并且横向方向。

更新日期:2021-01-19
down
wechat
bug