"Are these two end times coming? It feels like purgatory, the world is full of fire! Liu Kui said to the Zerg mother nest who was inseparable from him.

From a distance of a few hundred meters away from Liu to see the red lava, he could feel a heat wave constantly attacking him.

"Can this temperature melt ice crystals?" Liu Kui asked the Zerg brood again.

The Zerg Motherhive replied: "Throw it down and try it!" ”

Liu Kui prepared some ice crystals and some other kinds of crystals and the Zerg brood to a crater where magma was more active, and threw the crystals down.

"This volcanic ash is all over people's heads! Why don't we get closer? If you get closer, it's better to see if all these thrown crystals have really melted! It's a bit hard to see from this distance! Liu Kui discussed with the Zerg Nest.

The Zerg Hive agreed with Liu Kui's opinion and nodded in agreement.

Liu Kui felt very surprised by this move of the Zerg Nest: No matter what he said yesterday, this Zerg Nest is a strong pole to raise the bar, today is good, he casually said that this Zerg Nest who loves to drill the horns of the horns agreed so happily, is it that the method of training brain fusion and body that he insisted on during this time has played a role?

Liu Kui thinks that it should be, and there will be gains if he exercises like this.

The Zerg Brood proposed to Liu Kui, "Aren't you going to forge a sword?" Throw all your crystals into the lava of the volcano, melt them and forge them into the sword or other weapon you want. ”

Zhan Xiaogui nodded: "Actually, I thought about it a long time ago, isn't this that I'm observing whether the crystals thrown down are melting?" But since you said that, I have a question for you! If the crystals that were thrown down really melted, wouldn't it be mixed with magma? How can you separate the melted crystal water from the magma from the ice crystals and other crystals? If you can't separate it from the lava, you won't be able to forge a sword! ”

The Zerg brood nodded in agreement and began to think about it.

After a few minutes, he said, "I know this lava Pompeii worm with a long cry!" They are not afraid of magma at all! I can find a way to swallow the ice crystals and burrow into the magma table to melt all the crystals they swallowed, and then come out to the toilet and pull them down, and we can prepare the sword mold to be cast, and let the lava Pompeii worm pull directly into the mold! ”

Liu Kui's frowning brows also relaxed a lot when he heard the Zerg Motherhive say this, and he turned his head sideways to look at the Zerg Motherhive and nodded with a smile: "I have a proposal, can it be like this?" ”

"How?" Zerg brood road.

Zhan Xiaogui turned his head sideways and looked at the Zerg brood again: "Don't let the lava Pompeii worms swallow the crystals, let them hold the crystals in their own hands, and then let these lava Pompei worms get them into their own molds after the crystals are all melted in the magma?" I'm afraid of impurities if I swallow it! ”

Hearing Liu Kui say this, the Zerg Mother's Hive nodded in agreement, expressing his approval!

The current Zerg Brood is very supportive and concerned about Liu Kui's sword casting.

It took the initiative to search for some methods and processes about castings and some matters to be paid attention to in its very powerful brain, and then asked Liu Kui to agree and approve of these matters after reading these matters, and then show these matters searched by the Zerg Mother Hive to the lava Pompeii worms, so that they can understand the basic knowledge of castings, etc.

Liu Kui agreed and read the contents of the castings found by the Zerg Hive, and then decided to have the Zerg Hive transmit the contents of the castings to the lava Pompeii Worm.

The main content is: "The quality of castings mainly includes appearance quality, internal quality and use quality. Appearance quality refers to the surface roughness, surface defects, dimensional deviation, shape deviation and weight deviation of castings; The intrinsic quality mainly refers to the chemical composition, physical properties, mechanical properties, metallographic structure of the casting, as well as the holes, cracks, inclusions, and segregation existing in the casting; The use quality refers to the working durability of the casting under different conditions, including wear resistance, corrosion resistance, cold and heat resistance, fatigue, shock absorption and other properties, as well as machinability, weldability and other process properties.

The quality of the casting has a great impact on the performance of the mechanical product. For example, the wear resistance and dimensional stability of machine tool castings directly affect the accuracy and life of machine tools; The size, profile accuracy and surface roughness of the impeller, casing and inner cavity of hydraulic parts of various pumps directly affect the working efficiency of pumps and hydraulic systems, the development of energy consumption and cavitation, etc.; The strength and resistance to quenching and heat inducing of internal combustion engine cylinder blocks, cylinder heads, cylinder liners, piston rings, exhaust pipes and other castings directly affect the working life of the engine.

There are many factors that affect the quality of castings, the first is the design manufacturability of castings. When designing, in addition to determining the geometry and size of the casting according to the working conditions and the properties of the metal materials, the rationality of the design must also be considered from the perspective of casting alloy and casting process characteristics, that is, obvious size effects and solidification, shrinkage, stress and other problems, so as to avoid or reduce the occurrence of defects such as component segregation, deformation and cracking of castings. Second, there must be a reasonable casting process. That is, according to the structure, weight and size of the casting, the characteristics of the casting alloy and the production conditions, select the appropriate parting surface, modeling, and core making method, and reasonably set up the casting bar, cold iron, riser and gating system.

to guarantee the acquisition of high-quality castings. The third is the quality of the raw materials used for casting. The quality of metal charges, refractories, fuels, fluxes, metamorphic agents, casting sand, molding sand binders, coatings and other materials is not up to standard, which will cause defects such as porosity, pinholes, slag inclusions, and sticky sand in castings, which will affect the appearance quality and internal quality of castings, and in serious cases, will make castings scrapped.

The fourth is process operation, to formulate reasonable process operation procedures, improve the technical level of workers, so that the process regulations can be correctly implemented.

In casting production, the quality of castings should be controlled and inspected. First of all, it is necessary to formulate process rules and technical conditions from raw materials, auxiliary materials to the control and inspection of each specific product. Each process is controlled and inspected in strict accordance with the process rules and technical conditions.

After such a long period of existence and operation in the last days, there are now more and more aliens and alien creatures on the earth! Their ability to survive on the earth is also getting stronger and stronger, including some species that did not use lungs to breathe before have mutated and evolved again and again, and now they can actually adapt to breathing with lungs, and they will also learn to walk upright or something.