The single crystal alloy thing is a legendary thing for Liang Yuan in the previous plane, strictly speaking, more than 90% of ordinary military fans will not recognize what this thing is used for even if the single crystal alloy is thrown in front of them.

"Single-digit success rate ???"

Liang Yuan's voice was full of disbelief, in other words, it must be below ten percent, probably the actual product yield is too unbearable to witness, and his wife used a single digit This is a very tactful statement.

"This is comparable to the yield rate of C2 chips when Lao Su just repaired the first week of trial operation of the wafer production line. Liang Yuan smacked his lips and sighed.

"What about the proven technology of the Americans?"

"There is no information on the yield of Pratt & Whitney single crystal alloys, but the yield of the first generation of single crystal alloys of Rolls-Royce and GM is above 50% in industrial production, and the second generation technology will not be less than 70%. ”

"Ah, there is so much difference, why not change the production process of single crystal alloy. Liang Yuan said with some suffrage.

Because the connection between single crystal alloy and the military industry is extremely close, even in the era of the Internet, there is very little information related to it on the public network, of course, even if there is, it is definitely not more common than wild pandas to really understand military fans.

Liang Yuan only vaguely remembered that the republic of the previous plane had not increased the yield of single crystal alloys to more than 20 percent until the new century had passed for a long time.

"My mother and teacher also thought about it for a long time, and finally chose the heat protection coating of the blade and the metal surface treatment process of the afterburner section of the engine. ”

"Our launch vehicle technology and re-entry satellite technology are not bad, and the heat-resistant coating technology should be good, right?"

Thinking about the problem of the yield of single crystal alloy that had not been solved in the last plane for thirty years, Liang Yuan continued to ask with some reluctance.

Li Yuanling looked at Liang Yuan staring at herself, a little funny, some proud and a little sad, Li Yuanling always thought that Liang Yuan had a great enthusiasm for the aerospace field at this age, and it must have come from his own words and deeds.

Otherwise, in terms of Liang Yuan's current business talent. The success that can be achieved by finding any industry is much simpler than now, and in Li Yuanling's view, the so-called successors and family history are nothing more than that.

Pinched Liang Yuan's cheek affectionately, Li Yuanling said with a smile: "If this problem is completely clarified, it will be impossible without half a year." ”

"But before your dad comes over, I can talk to you briefly. ”

After Comrade Lao Liang was promoted to the director of the sub-bureau, his mount made great progress because of his position in the railway field. A two-axle rail official car produced in the fifties became the new mount of Comrade Lao Liang.

The 150-horsepower diesel engine drove a single car of less than 20 tons, and the average axle load was less than 10 tons, which was definitely one of the fastest cars on the road in the 80s at the Ministry of Railways of the Republic.

According to what the two girls just conveyed, Comrade Lao Liang plans to get off work a little early, depart from Dandong Station at 4 o'clock in the afternoon, and arrive at Shengjing South Station at 8 o'clock at night, but he will not delay the family reunion for dinner.

Of course, the Shengdan railway is still busy at the moment, and the Republic is still providing a lot of economic assistance to North Korea. If he was in a hurry to have dinner in Shengjing, the trucks in the sub-bureau would definitely have to make temporary changes, and some special trains for materials going to North Korea might be delayed.

However, the two girls knew from their usual conversations that Liang Yuan did not have any good impression of that friendly neighbor like a brother, so they tried their best to persuade Uncle Liang to "use power for personal gain", and swore that Liang Yuan would run back to Europe in a few days.

Considering that the tank matter had something to do with him, Comrade Lao Liang finally agreed to come over before dinner. In case of missing this time, judging from Liang Yuan's uncertain performance in the first half of the year, it is really a high probability event for someone to go abroad.

After all, the things in Comrade Lao Liang's plan are not far from each other, even if they do not involve the entire Yuanjia. If you don't make it clear to Liang Yuan, without Liang Yuan's endorsement and nodding, you can't use the power of the entire Yuanjia to do it, it will definitely be half the effort.

Finding that Li Yuanling had an expression of telling you a long story, Ning Wanjia happily brought a plastic stool from outside and came in, put it on the side of the reception sofa, and drove Liang Yuan to stay on the stool, and occupied the entire sofa with Ning Wanfei in someone's complaining gaze.

Li Yuanling looked at the shy Ning Wanjia with a smile, although she didn't agree to Liang Yuan's request to squeeze the sofa together. But he put his little hand on the armrest of the sofa and let Liang Yuan grasp it.

Thinking that Ning Wanjia when she was a child liked to squeeze together with Liang Yuan very much, and when she faced the ridicule of adults, she often stared at her dark eyes, nodded innocently and said things like "I am Xiaoyuan's little daughter-in-law", Li Yuanling felt that the relationship between the two childhood sweethearts would become more and more interesting.

Of course, there is something more interesting in Li Yuanling's memory, once someone squeezed the wrong person and recognized the wrong daughter-in-law at that time. Faced with a fat beating first, and then a huge tragedy of snacks or bottles being snatched away.

"Actually, this matter has to start with the policy when we first founded the country......." Li Yuanling looked like she was stuck in memory.

After the establishment of the republic, it can be said that everything is in ruins, and the devastated land is matched only by weak economic capacity and a large number of illiterate people.

Although the 40,000,000 compatriots sound very imposing, most of them are at the bottom level of those who can only be pulled out to watch the scene, and the bigwig-level elites who can play charity and barristers sit and talk are simply few in the huge population base.

Needless to say, even heavy industries such as steelmaking machinery still need industrial workers that a fledgling republic with hundreds of millions of rural laborers could provide.

Even if you have the money and the technology, what can no one do?

Therefore, giving up certain industries has become an inevitable choice, and after several large-scale meetings involving almost all academicians of the Chinese Academy of Sciences in the 50s, it has become a last resort choice for the Republic to seize space and release aviation.

Although aerospace and aviation are both the top embodiment of human technology, the specific technical issues between the two are very different.

The physical environment faced by space vehicles may be much worse than that of aviation vehicles, but many spacecraft work for less than as long as aircraft, and the environment faced by equipment such as satellites with long working hours is a near-constant vacuum, and there is little need to consider the motion mechanics of the product except for cosmic radiation and low temperatures.

This means that space vehicles can use many extreme materials with partial high performance, which is not the case for aerospace vehicles. (To be continued......)

PS: There is one more chapter in the evening