前言高温持久强度试验机用于测定金属材料在高温恒定负荷作用下的机械性能。它一般可分为单头和多头两种,由于多头持久强度试验机成本低,操作简便,因此,国外已获得广泛应用。R_6A型多头持久强度试验机具有结构简单,占地面积小而且造价低,耗电少等优点。廿多年来我们所还对杠杆,上、下夹具,温控系统等进行了多次改进。至今已完全可按国家持久 Preface High temperature strength test machine for determining the mechanical properties of metal materials under high temperature and constant load. It generally can be divided into two kinds of single-headed and long, long-lasting strength tester for low cost, easy to operate, therefore, has been widely used abroad. R_6A long-lasting strength testing machine with simple structure, small footprint and low cost, low power consumption and other advantages. Over the past 20 years, we also made many improvements on leverage, upper and lower fixtures and temperature control systems. So far it has been completely sustainable by the country