该进度表中的滚珠丝杠的原材料是什么？

题目：滚珠丝杠螺母设计与优化 摘要：滚珠丝杠螺母是一种高精度传动装置，广泛应用于机床、自动化设备、航空航天等领域。本文基于滚珠丝杠螺母的工作原理和结构特点，通过仿真和实验研究了滚珠丝杠螺母的优化设计和性能提升。主要研究内容包括：滚珠丝杠螺母的结构设计、材料选型、加工工艺、装配调试、性能测试和优化改进等方面。通过对滚珠丝杠螺母的研究和优化，提高了其传动效率和精度，为相关领域的应用提供了技术支持和参考。 关键词：滚珠丝杠螺母；结构设计；优化改进；性能测试；应用研究 Abstract: Ball screw nut is a high-precision transmission device, which is widely used in machine tools, automation equipment, aerospace and other fields. Based on the working principle and structural characteristics of ball screw nut, this paper studies the optimization design and performance improvement of ball screw nut through simulation and experiment. The main research contents include: structural design, material selection, processing technology, assembly debugging, performance testing and optimization improvement of ball screw nut. Through the research and optimization of ball screw nut, the transmission efficiency and accuracy are improved, providing technical support and reference for related fields. Keywords: ball screw nut; structural design; optimization improvement; performance testing; application research.