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在伟大的毛泽东思想的光辉指引下,在无产阶级文化大革命取得伟大胜利的凯歌声中,几年来,我国钢铁工业有了很大的发展,结合我国资源情况,增加了不少的品种,并且有许多新的钢种已成功地应用于工农业的各个方面。15MnV 钢就是我国新创造的一种新型低合金钢之一。电力系统的有关部门,为了紧密配合我国的钢铁革命,大胆地提出了以15MnV 钢代替20号钢,用于电站的大型锅炉的安装工怍,尤其是在东北地区,常常是在零下20～30℃的条件下进行的。因此这种钢材在这样的低温条件下焊接,会产生什么样的效果?对焊缝有何影响?焊缝的性能如何?等等,都不清楚。为此,我们对这种钢材的无缝钢管在低温条件下进行了一系列的焊接试验,现将试验情况介绍如下:
Under the brilliant guidance of the great Mao Tsetung Thought and in the triumphant triumphant song of the great proletarian cultural revolution, in the past few years, the steel industry in our country has undergone tremendous development. In light of the resources of our country, many varieties have been added and there are Many new steel grades have been successfully used in all aspects of industry and agriculture. 15MnV steel is one of the new low alloy steel newly created in our country. Relevant departments of the power system, in order to closely cooperate with the steel revolution in our country, boldly proposed the installation of large-scale boilers with 15MnV steel instead of 20 steel for power station construction workers, especially in the northeast region, often at minus 20 to 30 ℃ under the conditions of. Therefore, it is unclear what kind of effect this kind of steel will be welded under such low temperature conditions, how it affects the weld, how the performance of the weld, and so on. To this end, we conducted a series of welding tests on the seamless steel tubes of this kind of steel at low temperature. The test conditions are as follows: