%0 Dataset
%T Collection of papers on the design and development of key equipment and tools for polar drilling
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/9945235f-f0bc-4ddd-b073-9f27ea1198a8
%W NCDC
%R 10.12072/ncdc.SRIPE.db1685.2022
%A chi shenggao
%K Heat treatment;welding;impregnated teeth;mechanical properties
%X From 2018 to 2021, five papers on the design and development of key equipment and tools for polar drilling were published in Jingzhou and Wuhan, Hubei Province, including the research on low temperature heat treatment process, low temperature welding process, impregnated tooth formula, etc. The expansion temperature curves of low alloy fine grain steel for - 50 ℃ at different T 8 / 5 were measured by Gleeble 3800 thermal simulator. The microstructure and hardness of the thermal simulation samples were observed by optical microscope and microhardness tester. By analyzing the continuous cooling transformation (CCT) characteristics of low alloy fine grain steel used at - 50 ℃, the sh-cct curve of HAZ of low alloy fine grain steel used at - 50 ℃ was obtained.