"It's not a matter of craftsmanship now...... Wait...... What did you just say? You're able to build big propellers?"

At first, Gong Shuangqin didn't react, but in a blink of an eye, his face was stunned, and then an octave sound came from the receiver of the phone, which made Meng Jianye move the phone away from his ears slightly, so as not to damage the eardrums.

"Why don't you speak? Are you kid fooling around again?"

"Wronged, Director Gong, who am I fooling, I can't fool your old man, if not, you can come to our Endeavor Second Branch Factory at any time, if I say half a lie, you will press me to the back of the boat as a propeller!"

……

At the same time as the first time, the second branch of the foundry workshop.

Master Tian looked at the defective products cast two days ago with some shame, and then raised his eyes to look at the slender young man who looked like a big girl who was carefully inspecting the scrapped ship propeller in front of him, and his eyes became full of resentment.

The young man had arrived yesterday morning, very suddenly, and very strongly, and as soon as he arrived, he had run to the warehouse to inspect the remaining large scrapped marine propellers.

In this way, Master Tian didn't feel anything, he failed more than a dozen times, and he didn't care about being looked at again, but the problem was that this guy just looked at it, and the mouth didn't say a good word during the inspection, from the selection of alloy materials to the specific ratio, from the design of the mold to the final pouring, he didn't say a good word.

This made Master Tian on the side quite embarrassed, his own wounds have already been shown to you, is it necessary to sprinkle salt on them? Even if it is necessary, is it good for you to sprinkle it behind your back, and if you do this in front of you, won't your conscience hurt?

As it turned out, the young man who looked like a mother, but had a special mouth, didn't know what a conscience was, and when he saw the scrap that had been baked two days ago, his mouth was as if it had been opened, and the whole casting process was a mess.

What kind of salt is this sprinkling salt on the wound? It is clearly a tear and two more stabs.

Master Tian couldn't help it even if his temper was good, and he directly said angrily: "You can do it." ”

As a result, the arrogant boy gave him a simple answer: "Tomorrow!"

Now that a night has passed, what is in front of Master Tian is just a repetition of yesterday's scene, constantly inspecting and inspecting, but there is no recasting at all, Master Tian's heart is anxious, and not angry, just do it, look at what kind of big-tailed wolf to pretend?

I took a closer look at it again. ”

Just when Master Tian was thinking about himself, Liang Mingqiu, who was checking the situation of the propeller, stood up from the huge blade, waved his hand and turned his head to Master Tian, who was stunned, and said, "Master Tian, through yesterday's and today's inspection, the problem is generally clear. ”

Master Tian had no expression on his face, but he pouted indifferently in his heart, but it was not clear, from yesterday to now, if my Lao Tian's mouth is neat, it is clearer than you kid.

When Meng Jianye organized a group of people to send a group of people to a large shipyard in Jiangnan to learn the processing technology of large marine propellers, he said that no matter how long it takes, as long as he learns and achieves achievements, he will return to the Endeavor Factory.

Three years have passed, and the apprentices of Endeavor Factory have been recruited by the factory either because of the temptation of the big city or because of their excellent quality, and they have successively transferred their working relationship from Endeavor Factory.

Only Liang Mingqiu never took staying in Jiangnan as a thing.

It stands to reason that Liang Mingqiu's conditions are better than others, not only his own casting technology and machining technology are quite excellent, but the family can also provide him with a lot of support, although Liang Mingqiu's grandfather was refrigerated because of the special period, but there are several uncles in the family who have done well in the army, one of them has also made meritorious contributions on the southwest front, plus the two aunts in state-owned enterprises are also very capable.

The Liang family, which was still in turmoil a few years ago, has been stable in recent years, so there is no need for Liang Mingqiu to say anything, the family began to think about leaving him in Jiangnan Province, after all, no matter how good the Endeavor Factory is, it can't compare to the prosperous Jiangnan, let alone a shipyard with a history of more than 100 years.

But whether it was the olive branch of the shipyard or the kindness of his family, Liang Mingqiu refused them all, not for anything else, just because he promised Meng Jianye what he said: "Don't worry, I will go back after I finish my studies." ”

Some people say that he is stupid, some people say that he is a shaft, and some people say that he will regret it, but Liang Mingqiu is still the same, and it seems that he really wants to stick to this kind of stupidity and this kind of shaft to the end.

Seeing that Liang Mingqiu was really a king and a strong heart, the Liang family could only sigh and leave it alone, and a certain shipbuilding factory also began to gradually isolate Liang Mingqiu, and kicked him out when the people were angry.

So Liang Mingqiu, who was unlucky as always, returned to Endeavor Factory alone with the huge aura of a shipyard graduate, and then under the arrangement of Meng Jianye, he started the road of strong installation 13.

Fortunately, many employees of Endeavor Factory, including Master Tian, did not know the inside story, otherwise it would not be as simple as being indignant, but vomiting blood every minute.

Okay, being approved by a dropout who was kicked out of the factory is scorched on the outside and tender on the inside, is there still a reason for heaven?

Of course, since our classmate Liang Mingqiu has a more delicate appearance than a girl, it is a matter of no heavenly reason, so what Tianli is, I don't know at all, because of this, I don't need to pay attention to Master Tian's feelings, and without waiting for Master Tian's reaction, he leaned down and pointed to the small cracks on the leaf surface and said to himself:

"Stress corrosion cracks, several problematic propellers in the past two days are this problem, as the name suggests, this crack is produced by the combined action of stress and corrosive medium.

According to my production experience in a shipyard in the past three years, brass has low resistance to stress corrosion, especially high-strength brass with a single structure brass is more sensitive to stress corrosion, because of this, the reasons for stress corrosion cracks in brass propellers are nothing more than the following three points. ”

Master Tian, who was outside the fugue, was completely stunned, why did he suddenly talk about the reason? Isn't it time to criticize the process? What the hell is a stress corrosion crack?

Just when Master Tian was a little unsure, he saw Liang Mingqiu stretch out a finger and said expressionlessly: "First, because the temperature of the metal mold is too low, the paddle cooling speed is fast, which produces a large residual thermal stress of casting. ”

Then he stretched out a second finger: "The second is due to the rapid cooling of the paddles, which changes the normal metallographic structure of the brass." ”

"Third, when there is a large stress in the high-zinc brass casting with more than 20% zinc, the casting is placed in a humid atmosphere, especially in the atmosphere containing ammonia or sulfur dioxide, which can quickly produce intergranular and transcrystalline rupture. Saying that, Liang Mingqiu raised his third finger, and at this moment Master Tian was already dumbfounded.