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试验目的我厂生产的935吨/时锅炉采用悬吊结构。其中最大的一根主梁重达56吨、长24.6米、高3.8米,结构形式为焊接工字梁,采用武汉钢铁公司和鞍山钢铁公司生产的16Mn(Cu)钢,上、下盖板厚度有70、68、40毫米三种。由于锅炉为露天布置,安装工地的最低气温为-20℃,因此必须考虑大梁的低温脆性问题和使用安全问题。在实验室条件下用不同的试验方法和评定标准测得16Mn(Cu)钢板有不同的脆性转变温度,试验结果汇总于表1。
Test purpose I plant the production of 935 tons / hour boiler suspension structure. The largest one weighs 56 tons, a length of 24.6 meters and a height of 3.8 meters. Its structure is made of welded I-beam with 16Mn (Cu) steel produced by Wuhan Iron and Steel Company and Anshan Iron and Steel Company. The thickness of upper and lower cover is 70 , 68,40 mm three. Because the boiler is laid out in the open air and the minimum temperature at the installation site is -20 ° C, the low temperature brittleness issue and the safety of use of the girder must be considered. The different brittle transition temperatures of 16Mn (Cu) steel were measured under different laboratory conditions and evaluation criteria under laboratory conditions. The test results are summarized in Table 1.