1) capillary crack
发纹
1.
Research of the inner capillary crack of 20 steel tube rolled by horizontal continuous casting round billet;
20钢水平连铸圆管坯轧制的钢管内部发纹研究
2.
The magnetic particle detection method of centre hole in the heavy rotor has been introduced and its testing result also has been analyzed and summarized,especially prescribing the views of experience on the harmfulness of capillary crack defects.
特别是对发纹类缺陷的危害性提出了经验性的见解。
2) spontaneous crack
自发裂纹
3) crack developing
裂纹发展
1.
According to observation and analysis rock blasting high-speed photography experiment for deferent solid medium, the basic law of erack developing, and crack length and crack developing speed have been revealed under the deferent blasting methods.
本文通过对不同材质爆破高速摄影试验的观察和分析 ,揭示了在不同爆破方法下裂纹发展的基本规律以及裂纹长度和扩展速度。
4) surface hair_crack
表面发纹
5) Screw thread heating
螺纹发热
补充资料：发纹
发纹
hair crake
fOWen发纹(halr。rake)钢的一种宏观缺陷。指钢的塔形车削试样经酸蚀法或磁粉法显示出的、呈纵向分布的细小纹缕。它是钢中夹杂或气泡、疏松等在钢的加工变形过程中沿锻轧方向被延伸所致。发纹严重地危害着钢的力学性能，特别是疲劳强度等。用于制造重要机件的钢材，对发纹的数量、大小和分布状态都有严格的限制。 (颜广庭)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条