中、外文摘要及关键词的书写格式

摘   要

(格式：小三号黑体、20磅行距、段前后30磅、居中)

长大隧道越来越多地选用全断面隧道掘进机（TBM）施工技术，其中刀具是关键制约技术之一。本课题以秦岭隧道工程为背景，借鉴WIRTH公司先进刀具技术，研究设计了硬岩掘进机刀具。

首先，对刀具关键技术问题进行了分析研究，在此基础上提出了设计方案，然后进行了刀轴、轴承、联接螺栓等关键零部件的设计计算分析，应用计算机辅助设计技术完成了掘进机刀具全套设计图纸。设计中选用4Cr5MoSiV1作为刀圈材料，拟定了刀圈的热处理工艺，使所设计刀圈具有高强度以及良好的耐磨性和红硬性；……

（格式：小四号宋体，20磅行距，两边对齐）

关键词（小四号黑体，左对齐）：全断面隧道掘进机；刀具；热处理工艺（小四号宋体）

Abstract

（格式：小三号Times New Roman，20磅行距、居中)

Full face tunnel boring machine (TBM) is increasingly applied to the tunnel construction. One of the key restricting technologies lies in TBM cutters. In this design project TBM cutter for hard rock conditions is studied and designed in accordance with QINLING tunnel using WIRTH cutters for reference.

Firstly, the analyses and studies on the key technologies of the cutter are performed. Then ,based on this the design scheme of the cutter is proposed, some calculations are carried out for the important cutter parts such as cutter shaft, cutter bearings, bolts etc., a complete set of cutter design drawings is accomplished by means of computer aided design. In this design, 4Cr5MoV1 is used as the material of cutter ring, its heat treatment process is drawn up to make the cutter ring has a performance of better wear resistance, strength and hardness in higher temperature;…….

（格式：小四号Times New Roman，20磅行距，两边对齐）

Key words(小四号Times New Roman，加粗，左对齐): TBM；  cutter；heat treatment process (小四号Times New Roman)