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随着科学技术和工业的不断发展,工程結构件和机械设备所承受的载荷也在不断增加。为此,世界各国都在大力研究发展低合金高强度鋼,出現了一些屈服强度高达65～70公斤╱毫米~2、抗拉强度80～100公斤╱毫米~2的钢材。同时,也研究和发展了高强度焊条,以促进高强度钢在生产中的使用和进一步发展。几年来,我所結合国家资源和生产条件,先后研究成功屈服强度为70公斤╱毫米~2的14CrMnMoB和14CrMnMoVB高强度鋼,并試制成功工艺性能滿意、机械性能符合要求的CHT-17高强度焊条。經过两次生产和高压容器的焊接与爆破試驗,质量良好。現将这种焊条的性能和试验结果简介如下。
With the continuous development of science and technology and industry, the loads on structural parts and machinery and equipment are also increasing. To this end, all countries in the world are vigorously studying the development of low alloy high strength steel, there have been some yield strength of up to 65 ~ 70 kg / mm ~ 2, tensile strength 80 ~ 100 kg / mm ~ 2 steel. At the same time, also research and development of high strength electrode, in order to promote the use of high strength steel in the production and further development. In recent years, combined with national resources and production conditions, I have successfully studied the 14CrMnMoB and 14CrMnMoVB high-strength steels with a yield strength of 70 kg / mm 2, and successfully developed the CHT-17 high-strength electrode with satisfactory process performance and satisfactory mechanical properties . After two production and high pressure vessel welding and blasting test, the quality is good. Now this electrode performance and test results are as follows.