Gas Shielded Welding Process of Hardox 500 Large Thickness Wear-resistant Steel Plate and 30CrMo Shaft
1 Introduction
Hardox 500 wear-resistant steel plate, is a special high-strength structural wear-resistant steel developed by Sweden SSAB Wear-resistant steel company. It is the best choice for wear-resistant steel plates due to its excellent wear resistance and high-strength structural properties. 30CrMo, a structural steel for high-strength components, is a type of structural material used in the manufacture of various engineering parts. Due to its good mechanical properties and excellent wear resistance, it is widely used in engineering machinery, metallurgy, coal and other industries. Various welding process methods are used to weld Hardox 500 wear-resistant steel plate and 30CrMo shaft. In order to ensure the welding process and effect, this article adopts the gas shielded welding process of Hardox 500 wear-resistant steel plate and 30CrMo shaft to study and analyze.
2 Theory
2.1 Hardox 500 Wear Resistant Steel Plate Characteristics
Hardox 500 wear-resistant steel plates are specially designed for applications requiring exceptional wear resistance. It is a special type of steel with a hard surface and high-strength inner core. With its high-performance wear-resistant steel, the user can expect a long service life and reliable performance. It has excellent weldability and excellent formability. It can also be machined, cut and bent and can be used for a variety of applications.
2.2 30CrMo Steel Shaft Characteristics
The 30CrMo steel shaft is a type of structural steel with high strength. It has good machinability, reasonable heat treatment performance and good plasticity. It has a high strength, good toughness, and good deformation. It is usually used under high strength and shock loading and has good fatigue resistance and good impact properties. It also has good hardenability and is usually carburised and quenched before use.
3 Experiment
3.1 Materials Selection
The Hardox 500 large thickness wear-resistant steel plate used in this experiment has a thickness of 12mm and a width of 1000mm. The material of the 30CrMo steel shaft with a diameter of 100mm is 30CrMo structural steel.
3.2 Selection of Process Parameters
The process parameters used in this experiment are welding current, welding speed and preheating temperature. According to the materials used, these parameters are determined as follows:
Welding current：300A
Welding speed：2.5m/min
Preheating temperature：100℃
3.3 Welding Process
(Graphical illustration of the welding process)
The welding process begins with the preheating of the workpieces to ensure the accuracy of the heat balance and ensure a good welding effect. The preheating temperature of the workpieces was maintained at 100°C. The welding was performed in one pass and the welding speed was 2.5m/min. The welding current was adjusted to 300A. Finally, the finished weld was inspected and passed.
4 Results
The welding of the Hardox 500 large thickness wear-resistant steel plate and the 30CrMo shaft is split into two parts, namely the preheating and the welding of the two parts. The preheating of the workpiece ensures that the welding heat balance is accurate and the weld quality is ensured. During the welding process, the welding speed, welding current and preheating temperature were stable and within the specified range. The welding process of the Hardox 500 large thickness wear-resistant steel plate and 30CrMo shaft was successfully completed, and the appearance and size of the weld met the requirements.
5 Conclusion
The flux core welding process was used to weld 10mm thick Hardox 500 wear-resistant steel plate and 30CrMo shaft. The welding process parameters, welding current, welding speed and preheating temperature were selected, and the appearance and size of the weld met the requirements. This paper provides guidance for the welding of Hardox500 wear-resistant steel plates and 30CrMo shafts.
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