Device and method adopting high-rigidity metal for friction surfacing of low-rigidity metal
A low-hardness metal and high-hardness technology, applied in the field of solid-phase welding, can solve the problems of waste of materials, low efficiency, short duration of high temperature, etc., and achieve the effect of expanding the selection range, good continuous controllability, and high heating efficiency
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[0042] Example 1
[0043] This embodiment uses the above-mentioned device for preparation, friction surfacing LY12 aluminum alloy metal with A3 steel, the hardness of A3 steel is HV165, the hardness of LY12 aluminum alloy is HV120, and the resistance heating device 7 heats and controls the temperature of A3 steel at 500℃- 800℃, LY12 aluminum alloy is fixed on the water cooling device 2, and the water cooling device 2 is fixed on the workbench 1. In the test, the size of the A3 steel bar is φ20mm, and the size of the LY12 aluminum plate is 300mm*150mm*6mm. The specific steps of the welding process are as follows:
[0044] Step (1), start the resistance heating device 7 to heat the end section of the A3 steel bar, adjust the power supply to set the current to 900A, and heat the temperature of the A3 steel bar to the preheating temperature of 500°C. Preheating the final section of the A3 steel bar can not only achieve the preheating temperature of the steel bar, but also maintain the ...
Example Embodiment
[0048] Example 2
[0049] This embodiment uses the above-mentioned device for preparation, using A3 steel friction surfacing T2 pure copper, the hardness of A3 steel is HV165, the hardness of T2 pure copper is HV68, the resistance heating device 7 heats and controls the temperature of A3 steel at 800℃-1000 ℃, T2 copper is fixed on the water cooling device 2, and the water cooling device 2 is fixed on the workbench 1. In the test, the size of the A3 steel bar is φ20mm, and the size of the T2 copper plate is 300*150*6mm. The specific steps of the welding process are as follows:
[0050] Step (1), start the resistance heating device 7 to heat the end section of A3 steel, adjust the power supply to set the current to 1200A, and heat the temperature of the A3 steel to the preheating temperature of 800°C. Preheat the end section of the A3 steel to preheat The temperature of the steel can also maintain the rigidity of the upper section of the A3 steel to ensure the pressure between the tw...
Example Embodiment
[0057] Example 3
[0058] In this embodiment, the same device and process as in embodiment 2 are used, and the temperature of the A3 steel is heated to the preheating temperature instead of 500°C. The specific steps of the welding process are as follows:
[0059] Step (1), start the resistance heating device 7 to heat the end section of the A3 steel, and heat the temperature of the A3 steel to the preheating temperature of 500°C, and preheat the end section of the steel to preheat the steel temperature while maintaining the upper section of the steel The rigidity guarantees the pressure between the two metals and prevents the high hardness metal from softening and yielding as a whole and cannot provide pressure.
[0060] In step (2), the cooling device 2 is fed with flowing cooling water through the bottom through hole, the water temperature is -5°C, and the speed is 2m / min. Cooling water cools T2 copper to maintain rigidity and form a temperature gradient; T2 copper maintains rigi...
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