High-strength impact-resistance type steel used for shelf beam and welding technology thereof

Abstract

The invention discloses a high-strength impact-resistance type steel used for shelf beam, which comprises the following chemical components by weight percentage: 0.13-0.28% of C, 0.20-0.30% of Si, 0.20-0.46% of Mn, 0.85-0.95% of Cr, 0.28-0.32% of Ti, 0.16-0.22% of Mo, 0.24-0.36% of Nb, 0.05-0.07% of Cu, 0.18-0.36% of V, 0.59-0.79% of Al, 0.25-0.32% of rare earth trace element and the balance of Fe and impurity; the rare earth trace element comprises the following chemical components by mass percentage: 2-4% of Nd, 4-8% of Ce, 3-5% of Er, 2-6% of Pr, 1-4% of Pm, 0-5% of Dy, and the balance of La; the total content of impurity is less than or equal to 0.2, wherein, P is less than or equal to 0.005%, S is less than or equal to 0.007%, H is less than or equal to 0.004%, N is less than or equal to 0.006%, and O is less than or equal to 45ppm. The steel processing technology comprises the following steps: feeding, electroplating, drawing, annealing, insulating, pickling, drying and warehousing. The invention also designs a processing technology of the high-strength impact-resistance type steel used for shelf beam. The high-strength impact-resistance type steel used for shelf beam can obviously increase the wear-resistant compact-resistant capability of the steel, and has the advantages of simple operation technology, energy saving and environmental protection.

Description

technical field [0001] The invention belongs to the field of alloy steel and its processing, in particular to steel for high-strength impact-resistant shelf beams and its welding process. Background technique [0002] At present, because of the use of ordinary steel for shelf beams, after bending and stretching, the material of the bent part is stretched and thinner than other parts. Once the bent part is damaged, the shakeout pipe is often directly scrapped and cannot be used again. , resulting in a great waste; if the two ends of the thickened shelf beam are welded on the shelf with steel, due to the traditional welding process, the material properties caused by welding will deteriorate, thereby affecting the original performance of the weldment, or the welding Due to the combined action of welding stress or other brittle factors, cracks and pores are produced, which are easy to break and fall off during use, and high temperature and a large amount of harmful gas are gener...

AI Technical Summary

Problems solved by technology

[0002]At present, due to the use of ordinary steel for shelf beams, after bending and stretching, the material of the bent part is stretched, and it is thinner than other parts. Once the part is damaged, the shakeout pipe is often scrapped directly and cannot be used again, resulting in a great waste; if the two ends of the thickened shelf beam are welded to the shelf with steel, due to the traditional welding process, the material caused by welding The performance deteriorates, which affects the original performance of the weldment, or the weld seam produces cracks and pores due to the joint action of welding stress or other brittle factors, which are easy to break and fall off during use, and high temperature and a large amount of heat are generated during the welding process. Harmful gas is neither energy-saving nor environmentally friendly. If you don’t pay attention, it will cause damage to the staff and endanger your health.