The carbon content data of the mathematical model of molten steel smelting was finally fixed at 0.55%. The mechanical and chemical properties are more than 20% better than the electric furnace steel produced in the electric furnace steel plant, which can fully meet the needs of horizontal-lever diesel engine pistons, crankshafts, gears and low-bore pressure percussion barrels.

.

Of course, this is a simulation calculation result, and it is not clear what the actual error value is. Yu Hua hopes that the error value can be less than 1%.

The total smelting took 33 minutes. Now, the molten steel is tapped and the prototype steel ingot is cast.

Yang Zhi and a group of Red Army soldiers stared at the test furnace. The steel bucket, commonly known as the "steel ladle", came to the molten steel outlet. It contained deoxidizer. At the same time, the converter operator controlled the tilt angle of the furnace body and the slag ball device entered

state of readiness.

The slag ball device mainly prevents large amounts of mixing of steel slag and molten steel. It was designed by the Japanese metallurgical industry in the 1970s. The structure is a sphere composed of dolomite and iron core. The technical content is average and the design is extremely exquisite. Yu Hua unceremoniously put this

The exquisite design is put to use.

At this moment, everyone was holding their breath, not even daring to take a breath.

The metal baffle of the steel tap opened, and a ball of red flame burst out like an explosion, churning upwards with great force. Before anyone could react, in just one second, hot and scalding molten steel flowed rapidly along the groove.

, enter the steel ladle located directly below.

"It's out, the molten steel is out!" Looking at this scene, the workers and soldiers at the nearest distance burst into tears and couldn't help but cry from the deepest part of their hearts.

Molten steel, symbolizing the future of molten steel, was quietly born at a historic moment.

Looking at the continuous flow of molten steel, everyone present seemed to be possessed and fell into a state of obsession. An inexplicable feeling surged from the depths of the soul and spread throughout the body. The extremely dazzling molten steel appeared in the distance.

Far more attractive than any other stunning beauty.

It is so surging and powerful, it is so bright and moving...

As soon as the news of the molten steel came out, it swept through everyone in Sancha Bay like a bombshell. The entire Sancha Bay boiled instantly. Countless workers from the Military Industry Bureau and soldiers from the First Red Division were extremely excited and celebrated the moment in their own ways.

At 10:20 am on August 3, 1937, the world's first furnace of molten steel smelted by an oxygen top-blown converter was born in Sancha Bay, Yulin, northern Shaanxi, China.

"Add slag retaining balls and prepare the round ingot mold." Yu Hua looked calm and calm, not caring about the emotions of the workers and soldiers around him. He looked through the furnace mouth and saw that the molten pool in the furnace had been reduced by three-quarters, and continued.

The release of molten steel is worthy of celebration, but anyone can celebrate, except him.

The first smelting test is not over yet.

The chief dispatcher nodded, quickly waved the flag, and conveyed his respective instructions to the slag ball production team and the molten steel casting production team.

Soon, a slag ball with a diameter of 8 cm was placed above the tap hole of the converter to block the surrounding slag. At the same time, the molten steel pouring production team on standby immediately became busy checking whether there were any problems with the round steel ingot mold.

There are 90 sets of round steel ingot molds with an inner diameter of 80 mm and a length of 2.4 meters. They are connected in parallel to improve pouring efficiency. After the casting of these round ingots is completed, they will be sent to Liushugou Industrial Zone for tempering, forging and rolling, and then converted into stainless steel.

Seamed steel pipes, after a series of treatments, become qualified standard mortar tube blanks.

After a few minutes, the molten steel was poured out, and the ladle containing two tons of bright yellow molten steel was slowly lifted by a ten-ton crane, left the converter, and came to the sky above the pouring area.

The regrouping team constantly communicated with the pouring team. The ladle gradually lowered its height and came to the top of the pouring opening. The angle was tilted and the nozzle was aligned. In an instant, the molten steel with a temperature of 1,500 degrees Celsius suddenly flowed out and entered circles along the pouring opening.

Within the ingot mold.

After two tons of molten steel were poured, the scene was extremely spectacular. Ninety sets of round ingot molds ignited with billowing flames, and the molten steel inside entered the cooling stage.

"Deputy Team Leader Yu, what are we going to do next?" Yang Zhi, who was also staying in the main control room, asked curiously when he saw the scene in the pouring area below.

Hearing this, Yu Hua responded with a smile: "When the real test results are obtained and steel is smelted, then the first smelting test passes and a 24-hour trial production is carried out. If it is iron, then it is declared a failure and the problem is found.

Revise."

Although Yu Hua knew very well that what was being smelted was steel, he had to maintain the most basic rigor before formal test results were released.

"I see, then what we are smelting must be steel." Hearing this, Yang Zhi nodded, staring at the ninety sets of round ingot molds in the pouring area, murmuring softly, full of hope in his heart.

Based on the length of each set of molds being two meters and four meters, one round steel ingot can produce four mortar barrels. The round ingot here can theoretically produce 360 ​​barrels.

Three hundred and sixty barrels, in a sense, this is three hundred and sixty mortars!

After the joy of the first batch of molten steel flowing out, the factory once again fell into a state of expectant waiting. Everyone focused on the cooling round ingot molds, understanding that the quality of these finished products ultimately determines the success of the first smelting test.

Is it steel?

Or iron?

The molten steel in the round ingot mold cools and crystallizes, gradually forming grains. After a few hours, it is time to demould. As the first set of round ingot molds is opened, the fiery red round ingot comes into view, responsible for the final test result detection.

Two workers came forward with sledgehammers and carried out the simplest quality inspection on the red round ingot.

In this era, the easiest way to detect whether it is steel or iron is to smash it!

Pig iron will crumble and steel will deform.

"Dong dong dong!" The sledgehammer hit the surface of the round ingot hard, and a dull and powerful sound came out. The surface of the fiery red round ingot was slightly deformed, and irregular iron oxide was scattered. The body of the round ingot did not appear to be broken.

.

One hammer was not enough to seal the coffin. Under everyone's gaze, the two workers worked hard with their sledgehammers and hammered the ingot again and again.

Looking at the hammered surface of the ingot, the soldiers and workers surrounding them tried their best to remain silent and disciplined, but after a while, they could no longer bear the emotions in their hearts.

This is steel!
Chapter completed!