Noisy and noisy, Chu Hao returned to the extremely familiar life of Luozhou, had nothing to do with Han Lu, held a cup of tea in his hand after eating, and quietly watched the two girls busy in the kitchen, and even the grove where he practiced felt extremely familiar and cordial. Pen & Fun & Pavilion www.biquge.info

It's a pity that this kind of day, he can only live one day, and he has to go to Panxi, Ling Shuang has been in Panxi for so long, and there are still a lot of things waiting for him to confirm and sign, he really doesn't dare to delay it anymore.

To be honest, he also thinks it's interesting, he doesn't just buy a piece of equipment, why do those foreign devils who sell equipment have to let him sign in person, he is really full, it seems that he doesn't see the chairman, these foreign devils feel that they are not respected, what is wrong with this, who is used to it.

But there is no way, the ten tons of vacuum self-consumable electric arc furnace he needs now, and even the entire titanium alloy production line, its technology is basically mastered by the Western world, take the vacuum self-consumable electric arc furnace as an example, Huaxia can make the maximum is only three tons.

The advantages of large-tonnage vacuum self-consumable electric arc furnace are obvious, with higher production efficiency and lower cost.

If you don't use a large-tonnage production line, it is not conducive to the expansion of steel mills in the first place, and secondly, the cost increases, reducing profits and competitiveness.

But this is also something that can't be helped, not to mention that it is only 2001 now, even in the previous life to 2014, the share of China's manufacturing industry is the largest in the world, and there are many key technologies in the hands of the Western world.

Science and technology, a bite is not a fat person, can only be accumulated step by step, no matter how smart the Chinese people, hard work, can only from walking, to running, how can not fly.

Some people may wonder why the cars made by independent brands are still not so passable, and they are always a little wrong compared with joint venture brands.

Belch...... How to say that, the first is the technical secrecy, the second is that the cost of materials is not the same, what is the power of the country, which means that regardless of the cost, how many scientists are needed, how many enterprises are needed, how many enterprises are needed, how many good materials can be used, and the purity of the materials is also excellent.

In addition, it is the preciousness of some materials, let's take rare earths as an analogy, rare earths are known as industrial vitamins, if added to the material, it is the finishing touch.

But among these seventeen rare earth elements, the cheapest lanthanum is 134 yuan a ton, and the most expensive scandium is more than 20 million tons, and a kilogram of scandium is more expensive than a ton of lanthanum.

Then these spacecraft use scandium, and ordinary alloys use lanthanum, which of course has a different effect, after all, the cost is there.

As for civilian ones, many times, let alone the use of rare earths, even titanium alloys cannot be used.

Another aspect regardless of the cost is the purity just mentioned, 99% purity is 1341 tons of lanthanum oxide, but 99.999% lanthanum oxide is 41,000 tons.

Sometimes it costs much, much more to increase the purity level.

Or relying on luck, in fact, it is also one aspect regardless of the cost.

For example, when machining a mechanical part, the accuracy required by the part, that is, the tolerance zone, is plus or minus 0.1 filament, that is, one thousandth of a millimeter.

However, the accuracy of the machine tool itself is not enough, and the accuracy of the parts it can process can only be guaranteed in 1 wire, so what to do.

Done in large quantities.

For example, there is only one part, and then the processing unit will make a hundred, and then pick one of the hundred, after all, the machine tool can ensure that it can reach 1 wire, that is to say, the accuracy of the parts will change between 0 and 1 wire, and there will be 0.1, 0.2, 0.3 and so on in the middle.

Then pick out the only good one among the hundred, and as for the rest, it will be scrapped, do private enterprises dare to do this.

In addition, the requirements for use are different, the service life of the aircraft engine of a military aircraft is preferably 8,000 hours in the United States, more than 4,000 hours in Europe, and Russia has also caught up, almost 4,000 hours. As for Huaxia, because it started too late, the tenth master still used the Russian AL-31F, with a life span of only 900 hours, and later in 2010, a scientific and technological breakthrough was organized, and it was extended by 600 hours, reaching 1,500 hours.

As for civil aviation aircraft, the general retirement time is 25 years, generally speaking, the aircraft is carried out without stopping the aircraft, medium and large aircraft can fly for about ten hours a day, 25 years is basically 90,000 hours.

If it is according to the engine life of the tank, it will be even more excessive, the engine of the general tank is 500 hours overhaul, and it can be used for 200 hours after the overhaul, which means that it has a total of 700 hours of life.

However, for civilian vehicles, before the mandatory scrapping regulations for small family cars were abolished, the mandatory scrapping kilometers of cars were 600,000 kilometers, that is, according to the average speed of 60 kilometers per hour, which is an impossible standard, which is basically 10,000 times the life of a tank engine.

However, this cannot be said that the engine of the tank is not good, and the scrapped tank engine can continue to work for two or three thousand hours in areas with relatively poor conditions, such as oil drilling and geological survey.

Therefore, it is not difficult to want a good one, it is not difficult to want a cheap one, and the hardest thing is to be good and cheap.

Of course, it doesn't mean that China can't do it, and those who dare to touch aero engines are only a handful on the entire planet, and they have already killed 99% of the countries in seconds.

"What, I'll have to leave later, there is still a bit of urgency on the steel mill side that I need to deal with. Chu Hao said a little sneeringly.

Xia Yun had already known the news, so there was no surprise, as for Han Lu, her brows furrowed slightly, and then she pretended to be indifferent and said, "If you go, don't go." ”

Having said that, Han Lu didn't even notice that the rice on the chopsticks had leaked, and still sent it to his mouth, and then pulled it out, as if he had really eaten something.

"When I get back, I'll bring you a present. Chu Hao said.

Hearing this, Han Lu couldn't help but smile at the corner of his mouth, he was almost hurt by Chu Hao's stupidity, and glanced at Chu Hao, "Come on, let's say something normal, you don't go to Paris, London, what gifts can you bring to Panxi, bring me two pieces of titanium alloy back." ”

Being said like this, Chu Hao was suddenly a little dumbfounded, his thoughts moved, and he was in a hurry: "Who said that there are no good things over there, there are no ethnic minorities, there are many things with ethnic minority characteristics." ”

"Bang!"

Glancing at Chu Hao with disdain, Han Lu put the chopsticks on the bowl and sat up directly.

"Why are you going?" Chu Hao shouted.

"Pack your bags, or wait until tomorrow class, and whoever will pack it for you." ”

Han Lu had already walked to Chu Hao's bedroom and was busy.