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自1964年以来,我厂在压力容器的生产中逐渐推广应用了低合金高强度钢,其中包括16Mn、15MaV、15MnTi、15MnN、14MnMoV、15MnMoVN、18Mn MoNb 及14MnMoVN 等。在某些高压容器中也部分地采用过19Mn5、BHW35、FG43等西德高强度钢。这些钢的屈服强度在35～60公斤/毫米~2之间。在上列各种高强度钢的焊接过程中,都在不同程度上产生过焊接裂纹,有的甚至造成了灾难性事故。总结我厂十余年制造高强度钢压力容器的经验,焊接裂纹主要有如下几种形
Since 1964, our factory gradually popularized and applied the low alloy high strength steel in the production of pressure vessels, including 16Mn, 15MaV, 15MnTi, 15MnN, 14MnMoV, 15MnMoVN, 18Mn MoNb and 14MnMoVN. In some high-pressure vessels are also partially used 19Mn5, BHW35, FG43 West Germany high-strength steel. The yield strength of these steels is between 35 and 60 kg / mm2. In the above various high-strength steel welding process, are to varying degrees, have produced welding cracks, and some even caused a catastrophic accident. Summary of our plant more than ten years experience in manufacturing high-strength steel pressure vessels, welding cracks mainly have the following shape