Chapter 102 Aluminum and Steel: How can we love each other with different personalities

  Compared with steel, aluminum alloy has higher strength under the same weight. Therefore, in order to reduce weight, many equipment will choose to use aluminum alloy. The earliest was the aviation industry, and then expanded to the automobile and other industries.

  In the field of shipbuilding, aluminum alloys have also been widely used internationally. However, there is a big problem in welding aluminum alloys and steels together.

The melting point of aluminum alloy is only six to seven hundred degrees, and the melting point of steel is more than one thousand degrees. Therefore, if ordinary welding methods are used, the aluminum alloy will melt first, but the steel is still in solid form. In this way, the melted aluminum alloy will Floating on steel, even if some parts are fused together, the weld will be uneven.

  How can people with different personalities love each other, and how can people with different natures blend together?

  At this time, Meng Fansheng raised a very serious question.

  Qin Tao looked at Meng Fansheng cheerfully. This man had an ordinary appearance, except that his mouth was relatively large. When he spoke, the shape of his mouth would change constantly, and the big mouth seemed to be dancing on his face.

   "Yes, aluminum alloy and steel seem to be difficult to weld together." Zhao Ling was also a little worried at this time.

"Everyone, think about it, if aluminum alloy and steel are not easy to weld, how can ships from other countries realize that the lower hull is made of steel and the upper building is made of aluminum alloy? Are they riveted together?" Qin Tao asked back.

  Hearing this, everyone was taken aback.

  Yes, it has become a popular trend in foreign countries, which means that this problem has been solved long ago!

   "Qin Gong, can you tell everyone how to weld?" Zhao Ling asked.

  Qin Tao rolled his eyes at him. Didn't he get used to calling him Brother Tao before? Why did you change your mind again? However, now that Zhao Ling is a representative of the army stationed in the factory, she should keep some distance from herself.

In front of the other two people, Qin Tao couldn't care about these things either. Facing expectant eyes, Qin Tao said: "At present, there are mainly several ways to weld aluminum and steel. Friction welding uses friction to weld two metals together. fused together, one of the workpieces had better be in the shape of a shaft to be suitable for this type of welding."

   This is also easy to understand. Weld a pillar on the steel plate, then rotate the pillar, and the bottom of the pillar will rub against the steel plate to generate heat, and finally bond together.

   "Explosive welding, this is suitable for welding aluminum and steel plates."

   "Explosive welding?" Almost all of them said in unison. They didn't expect such a violent method to exist in the field of welding.

"Yes." Qin Tao looked at Meng Fansheng's big mouth with a smile: "Explosive welding refers to using the shock wave generated by the explosive detonation to drive the metal movement, and collide with the two metal surfaces to form a jet to remove the surface film. , and form a welding method of metallurgical connection under the action of shock wave high pressure. Because it is instantaneous welding, the workpiece as a whole will not be affected by high temperature, and only melt at the welding joint. This weld often forms a wavy interface with high bonding strength. The interface resistance is small. The explosive welding equipment is simple, the production cost is low, and it is suitable for industrial production."

   "The third method is brazing, which uses gas welding flame as the heat source and melts lead solder for welding. If the requirements for the weld are not high, aluminum welding rods can also be used for welding."

  Who said aluminum and steel can't be welded together? Qin Tao provided three ways.

  Hearing what Qin Tao said, everyone present nodded their heads one after another. Meng Fansheng continued to speak with a big mouth: "So, what welding technology does your shipyard have?"

   "Not yet." Qin Tao is very sincere.

The news came too fast. Qin Tao originally thought that it would be a few months before the Navy would rush to build the missile boat. Who would have thought that the construction of the catamaran would be agreed now. The master welder at the shipyard We are all busy welding that dredger, even if we practice welding technology occasionally, it is also aluminum alloy welding, and the welding technology of aluminum and steel has not yet been involved.

  The rice needs to be eaten bite by bite. Who would have thought that before the chicken legs were finished, a large pot of braised pork would be served.

   Even if you can’t eat it, you have to eat it!

   Talked for a long time, isn't it for nothing?

   "Qin Gong, you mean, there is not yet, but there will be in the future?" Zhao Ling asked.

   Sure enough, Zhao Ling is still considerate. Qin Tao nodded, and it would be much more convenient if someone complimented her.

   "Yes, if the navy decides to use aluminum alloy for the superstructure, then we can immediately hire specialized master welders to train our welders, or help complete the welding of aluminum alloy and steel hulls by ourselves," Qin Tao said.

   If you want to use it, let's find a way. If you don't use it, then we won't bother. This is what Qin Tao means now. After all, the construction period of the dredger is also very tight.

   "Well, we won't know until we try it. Let's see if your welding results can meet the needs of the navy." Meng Fansheng said.

  Qin Tao was helpless: "So, you don't require aluminum alloy for the hull?"

  Meng Fansheng shook his head: "The navy is not that extravagant."

  Actually, steel for the hull and aluminum alloy for the superstructure is a more suitable matching solution. If the whole body is made of aluminum alloy, it can certainly make the hull lighter, but there is also a big problem that cannot be solved.

  In addition to the high cost and the fact that it can be burned, the bigger problem is the corrosion of seawater. There is salt in seawater. For ordinary steel, as long as a few more layers of paint are applied, it can still protect the steel from corrosion, but not for aluminum alloy. corrosion problems.

Therefore, in the time and space before Qin Tao's rebirth, after the majestic and domineering catamaran missile boat was launched into the water, after discovering this problem, after several researches, he finally used the simplest method: as long as he returned from the sea, he would directly use the crane to lift the boat to the water. This kind of catamaran missile boat is hoisted to the land on the inclined slide for launching to bask in the sun, leaving only three or four duty boats floating on the water at the pier.

  Once there is a mission, these missile boats can quickly slide into the water to attack collectively. Solving this big problem simply and directly, the wisdom of the Orientals shines.

   Now, Qin Tao and the others have used high-strength steel, and even started rampaging at the customs, invincible, showing the strength of this catamaran, so there is no need for the army to require the hull to be made of aluminum alloy.

Qin Tao nodded: "Okay, then I will invite the master welder to come over tomorrow and show you that our shipyard has already built two catamarans with rich experience. Even if I am not here, they can start from tomorrow. Welding the hull, by the way, it would be even better if you could send someone to come with me."

  Zhao Ling nodded: "The part I'm in charge of needs to be welded before the outfitting can start. I can go with you."

  (end of this chapter)