Super military empire

"Chief Zhao, are there any statistics on the artillery? In addition, which unit produced it? When did a detailed investigation of the production have been done?" Such a few hours passed, Liu Yijiu felt that You should be able to investigate something.

There was no way to find out on the western front. They were all guns produced in the late 1960s. They were never used. This time they were pulled out of the arms warehouse.

Liu Yijiu was surprised to find that many guns did not even have numbers on them!

If the situation on the Eastern Front is the same, it would be impossible to find out.Even if it is found, no one will admit it.

This responsibility, not many people will admit, in the end, the responsible person will definitely be shot.

"According to the factory number and our registration, all these mortars are manufactured by the Guixi 2983 Factory..." Liu Yijiu hadn't thought of it, but he had already checked the production unit.

"Is the muzzle deformed very seriously?" Liu Yijiu was surprised and asked.

"Yes, according to our technical staff's analysis of this accident, it should be a quality problem that occurred during the production process. Some of the guns were produced in the past and were pulled directly from the warehouse, and some guns were recent. It was produced every month. Which one of the blast chambers was the latest one to be shipped to the front line. The officers and soldiers of the army have always responded that a lot of guns fired a few rounds and they had to stop and cool the gun barrels. Putting the latest production guns into use, who would have thought..." Zhao Bingyi said helplessly.

Liu Yijiu nodded, indicating that he already knew.

And recorded the name of the unit of 2983 Factory in his notebook.

This is very important. If there is a problem with ordnance equipment during use, it must be held accountable according to the production batch number.Therefore, it has always been required that the technical data during the production process must be kept in the archives. These technical data include drawings, process regulations, quality inspection tracking cards, inspection records, and a series of things.

According to the use of equipment, all technical data must be preserved when the equipment is not scrapped.

Liu Yijiu still asked Zhao Bingyi to show him the guns first.

What Liu Yijiu didn't expect was that Zhao Bingyi brought him to see a small open space not far in front of the 123rd division headquarters, where dozens of mortars of various calibers were actually placed.

"The soldiers of the mortar company would rather have grenades than use these guns..." Zhao Bingyi was very sad.

Once upon a time, these things were the favorite things of their soldiers.

Liu Yijiu did not speak, but started to measure the caliber of these guns with Luo Tong who was yawning, illuminated by the flashlights of soldiers sent by Zhao Bingyi.Now they can do everything like this. Only in the arsenal or research institutes are there hardness testing equipment and physical and chemical analysis equipment.

Only then can we know what exactly caused it.

The data obtained is roughly the same as the batch of mortars on the western front. Liu Yijiu has basically determined that the guns on the western front should come from the 2983 factory. If not, at least the same batch. material.

"Master, there is a bulge under the barrel..." After Liu Yijiu finished measuring all the guns, he just stood up, and Luo Tong, who had been squatting on the ground and recording data with him, called out.

There is no need to look with the naked eye. Because the surface of the barrel has been processed and has a surface treatment process, it is very smooth to the touch. If there is a bulging phenomenon, anyone with a slightly better hand can feel it.Only those experienced masters can feel the slight surface quality problem.

Liu Yijiu quickly asked him to bring the barrel over.

Touching from one end to the other with your hand, his face becomes harder to look.

"This is not a bulge, but the deformation is too serious..." This situation should be caused without heat treatment.

The steel used to manufacture the barrels and the barrels originally required very high hardness, and special gun steel was produced to make the barrels.In order to improve the cutting performance of the barrel and make the processing easier, heat treatment is used to reduce the hardness before processing, and at the same time to improve the uniformity of the barrel material. After rough machining, quenching and tempering heat treatment will be carried out, and then semi-finishing. Quenched and tempered at high temperature...

The barrel produced in this way has high hardness and good toughness.

Especially for some special gun steel, after such a process, the gun barrel has very high high temperature strength and ablation resistance.

Only with good high-temperature strength can the barrel be deformed due to the instantaneous high temperature and high pressure and friction when the gun is ejected from the bore.

"Director Zhao, please arrange for someone to saw these barrels open, and have someone help me pick up a magnifying glass with the largest multiple of yours... If there is nothing unexpected, I think I have found the cause of the problem." Liu Yi Jiu's face is really ugly.

Those bastards who are producing dare to do such a thing!

"What's the problem?" Zhao Bingyi didn't expect that the young man sent by the Ministry of Machines and Machines could easily discover the cause.

Is this a joke?

"Now it's just a guess. After sawing this open and watching the metallographic structure of the barrel, I can only confirm it!" Liu Yijiuqiang said, enduring the anger in his heart.

Zhao Bingyi didn't say anything, but asked someone to go to the maintenance department to find a technician from the maintenance department to come here with the things Liu Yijiu wanted.

"What? Saw this barrel? Chief Zhao, are you kidding? The hardness of this barrel is comparable to our saw blades. It can't be sawed at all. Once you saw it, the teeth would have to be smoothed... …" The teacher from the logistics and maintenance department of the 123rd Division came here to see, and suddenly became angry.

"I told you to saw it, don't talk nonsense!" Zhao Bingyi now faintly guessed why.

He is in charge of the logistics supply of the entire Eastern Front, and has an understanding of the most important artillery production process.

Only the gun steel that has not been quenched, or the hardness of the quenching is not enough, can it be cut with an ordinary saw blade!

The chief who raised the objection at the beginning, under the anger of the chief, personally picked up a saw, took a barrel with one hand with a dissatisfaction, placed it on the stand, and put the saw on it. Pull.

The feeling from his hand made him stunned.

This is simply unscientific!

He thought that with such a sudden pull, the saw blade in his hand would break, at least it would slip on it, and it would not move at all.But there was the kind of resistance that saw the saw blade saw into ordinary steel.

The sky had begun to light up slightly, he put the barrel in front of his eyes in disbelief, and yes, there was a silver-white saw mark on it!And at least more than ten threads of depth!(One millimeter is 100 silk. According to different regions, state-owned units are called silk and some are called directors.)

This is the hardest cannon steel, and it is the hardened cannon steel!

So soft.

"Huhuhu..." As if facing an enemy, the director desperately started sawing the barrel.

When Zhao Bingyi saw this situation, the raging anger in his chest had already burned him almost crazy.Those bastards responsible for the production did not treat the lives of frontline fighters as a single thing!

"Saw everything apart!" He gave an order with a pale face. If this is the case for the entire batch, the people in charge of the 2983 factory are absolutely to blame!

Even if he took his old life, it was not enough to make up for the sacrifices of the soldiers.

Commander Xu Shiyou didn't sleep all night, and was able to fall asleep with the counsel of the guards and the old generals in the early morning. After sleeping for more than an hour, he got up.I asked if the personnel sent by the after-installation had arrived, and finally heard that the 123rd Division had people saw the barrel.

I heard that what caused the blasting phenomenon has been found out.

Suddenly, he couldn't care about the exhaustion of his face and his dissatisfied bloodshot eyes, and even his face could not be washed, so the guards drove him towards this side.

The sky was already bright, and many barrels were sawn or broken. The wall thickness of the mortar barrel was not too thick. After the sky was light, Liu Yijiu started to observe all the barrels with a magnifying glass. Observing the position.

"Records, No. 1 barrel, the internal trachoma is obvious, and it is suspected that no flaw detection or missed inspection has been carried out. At the same time, the grain structure is coarse and no heat treatment has been carried out..."

"Record, the 18th barrel, the internal grain structure is coarse, the organization is sparse... It is suspected that no heat treatment process has been carried out..."

"Record, the 22nd barrel, the internal grain structure is coarse, the outer surface grain is fine and compact, it is suspected that the quenching time is not enough, and the high temperature tempering process is not carried out..."

"recording……"

Liu Yijiu used a magnifying glass to carefully observe every gun barrel that was slit.

These are not comparable to microscopes, but they can have a clear understanding of the internal organization of steel.Of course, this must be done after observing a lot of metallographic structure!

"Director Zhao, most of these guns are not heat-treated, or the heat treatment process is not enough, and the time is not enough. Some are heat-treated, but the material itself has casting defects, and the bubbles are formed during casting. Because of the high temperature and high pressure, irregular deformation will appear. It will gradually crack due to the high temperature and high pressure inside. Finally, the deformation will be too large and the shell will be stuck inside, causing the phenomenon of blasting..." Liu Yijiu took a lot of deep breaths, suppressed the anger in his heart, and said to everyone with a serious face.

"Where is the bastard in the logistics equipment headquarters? Get out of this girl! I want to see what you bastards do. You can't take the lives of soldiers, because your incompetence can make many soldiers in vain. Life was lost!" Before Zhao Bingyi had time to answer, a clear and angry young girl voice came from outside the crowd.

Immediately afterwards, I saw a female soldier wearing a cadre uniform carrying a handful of s75 made by Liu Yijiu in her hand, opening the surrounding technicians and walking in with frosty faces...