2. In terms of scientific research, fully develop stainless steel welding materials with excellent technology and good performance, and solve the welding problem of stainless steel covered electrode coating. We have used various stainless steel covered electrode to weld high carbon steel, high strength and ultra-high strength low alloy steel with poor weldability on many military and large civil engineering equipment, and achieved no crack after low temperature preheating or no preheating welding.
3. Develop high strength steel for domestic 654.38+ 1 100 million m3 crude oil storage tank, and popularize it in batches. The catalytic mechanism of Nb, Mo and other elements in the heat affected zone of high-strength steel with large weld energy was found, and the relationship between composition, microstructure and production process parameters was established, so that the characteristics of high-strength steel with large weld energy were more deeply and comprehensively understood.
4. Zhang Hanqian is in charge of the project "Research on High-strength B6 10E Welding Technology and Supporting Welding Materials for Large Oil Storage Tanks", and developed the supporting welding technology of 65,438+1100 million m3 high-strength steel for crude oil storage tanks in China, laying a foundation for large-scale popularization and application.
5. On June 9th, 2006, B6 was in charge of the project "High-strength quenched and tempered steel with low welding crack sensitivity for pressure vessels", and found out the influence characteristics of B, Ni and Cr on the properties of this kind of steel plate, and successfully developed 6 10MPa series with low welding crack sensitivity for pressure vessels at -20℃, -40℃ and -50℃.
Baidu Encyclopedia-Zhang Hanqian