At four o'clock in the afternoon, the Yangtze River Shipyard delegation, with three cooperation agreements/15 sets of spindle propellers, left in a very happy mood, and felt that the trip was worthwhile.

We had a meal of a lifetime and signed three significant documents, the first of which was a long-term strategic cooperation agreement on the purchase of a spindle propeller.

This agreement is valid for at least ten years!

The second is a single business contract, the propeller spindle of a luxury cruise ship is 2.2 million, and the profit of this thing is relatively low, and the cost of materials is not cheap.

The third and most important one, Jiang Feng promised to provide support to [Yangtze River Shipyard] in many aspects such as technology/equipment in the future, and the return was business orders.

Each takes what it needs, win-win cooperation, Jiang Feng wants to take orders to make money, shipyards need technology, or need high-end processing capabilities, there is no conflict of interests.

After signing an order of 1000+2.2 million yuan, and there are more potential cooperation opportunities, Jiang Feng was very satisfied, and happily sent away the bigwigs of the shipyard and returned to work in the factory shed.

Idle and bored, smelting metal scrap!

The mechanical experts and Wei Wu and Wei Liu started to throw the remaining iron filings/iron blocks/leftovers into the electric furnace the size of a toilet, and started to heat up.

"Zizi Zizizi~~~"

500kw high-power high-frequency current, heating iron from room temperature to 100-200-300- until a full 2,000 degrees Celsius in minutes, the melting efficiency is very high.

Low heat leakage and excellent temperature insulation!

This also has a huge benefit--- the surroundings are not heated too badly, and there is a very comprehensive ventilation system in the shed, so there is no feeling of being too hot.

Ten minutes later, 3.6t of homogeneous molten iron was stirred and poured into the shaft embryo mold 17cm×4.85m, which could be filled with four sticks and some of the remaining ones, which were cast into large iron ingots.

Then, there is the heating of aluminum alloy chips...

Eventually, four sets of spindles/propellers/transmissions were produced from the smelted scrap, and even a lot of aluminum alloy was processed.

Spend money to buy raw materials, can't be wasted!

There was nothing to say all night, and the next morning, the steel purchased by the maintenance plant arrived, with a total of more than 270 tons of iron/aluminum/copper/titanium/lead plates and other materials, worth more than 270 yuan.

The average Nima is 10,000 yuan a ton!

200t steel/50t aluminum/5t titanium/15t copper... They were all neatly arranged and piled up in a corner, and the people who paid to send the steel company away, everyone continued to work.

First of all, the raw materials required for smelting the main shaft propeller of a large cruise ship ordered by [Yangtze River Shipyard];

It has a diameter of 45cm and cannot seep in...

The penetration depth of the metal jet is 10CM, and the depth is already weak, and the spindle diameter of 45CM is obviously unable to completely penetrate, and the best effect cannot be achieved.

Therefore, [mechanical experts] have studied a new type of shaft embryo alloy material, named: ZG--101, the formula uses copper and iron as the main raw material, and tungsten, nickel, titanium and aluminum...

Cheap / high hardness / strong toughness / anti-rust / casting is not easy to produce dark damage, the internal structure is compact, the plasticity is excellent, very suitable for processing propellers!

Ji Yuan/Wei Wu/Wei Liu started to work, and Jiang Feng also counted with his fingers: "With a diameter of three meters and a thickness of 30 centimeters, then the volume is 1.5× 1.5×3.14×0.3m..."

"It should be 2.1 cubic meters, that's right!"

"The alloy density is 8.5, and it takes 18 tons!"

"Damn, this cost is not low~~"

The steel billet is 18 tons, the utilization rate is 20%, and the actual weight of the propeller is about 3.55 tons.

This 3.5t electric melting furnace has been modified to greatly increase its capacity and power, with a maximum effective working capacity of 1.25 cubic meters/10 tons, which needs to be divided into two meltings.

In 15 minutes, heat 2800+ degrees, melt and pour the sealed mold box, immediately melt the second furnace, and before the temperature is reduced to 2300 degrees, the second furnace is out of the pot.

The melting point is 1860 degrees / the boiling point is 3150 degrees, and the temperature is not reduced to 2,000 degrees Celsius.

"Add 5.15 tons of iron ingots..."

"Add 2.27 tons of brass..."

"Add 1.38 tons of aluminum ingots..."

"Add Gr2 pure titanium 200kg..."

"Add 80kg of refined tungsten powder..."

...... Wait a minute.....

This is the amount of one furnace, two furnaces in a row, and finally the "big discus" for casting the propeller is made, stirred evenly, and strengthened with a tool [high-frequency pulse electromagnetic gun].

Then it is necessary to produce a "big discus" to make two large propellers, the technology is slightly difficult, and the accuracy can ensure that the error is less than 0.03 wires, and it is fully qualified.

However, it was a very simple job for the [super machining center], and it was easy to produce two propellers/two propeller shafts in half a day.

However, if the alloy is consumed about 26T, the cost of raw materials will be 500,000 yuan, and there will be electrical loss, and the total cost may be as high as 600,000 yuan in Nima!

600,000/2.2 million, less than 370%...

cough cough~ Although it is not too high, compared with the average profit of heavy industry manufacturing enterprises, this has actually reached the level of rebellion, four times the net profit!

Jiang Feng was still very unhappy, complaining about his cheating father---

The profit of a small propeller is 900%, which is more profitable than making a large propeller, which is too cheating; he doesn't know that this is the market, and the bigger the profit, the lower the profit.

It's worth a lot of money, but it's not necessarily profitable!

In the afternoon, Wei Da/Wei Er/Wei San/Wei Si/Gong Dagong 2 Gong 3 Gong 4 took the special car of [Xinsheng Coal Mine] back to the maintenance plant, and the top brace project was very successful.

The coal mine is very satisfied, and the municipal safety supervision department came to inspect and evaluate the acceptance of the project, which is very good!

The project money has been paid off, and the final payment paid in advance by the coal mine to buy the equipment has been swallowed up by the coal mine.

The balance of bank card + WeChat is less than 300,000...

Jiang Feng sighed: "Thank you for your hard work!"

The mercenaries shook their heads: "It's not hard!"

They are the mercenaries of the silicon-based civilization, always tireless in their hard work, without fear, without even much thought and emotion, and acting according to the rules of the system.

Now that there are not many orders and the work is limited, Jiang Feng recalled four engineers and arranged for Wei Dawei and Wei Er to work with mechanical experts to produce propellers/spindles.

The alloy scrap/scraps/debris are re-smelted and cast alloy embryos, and the seven people are just divided and cooperated, and the assembly line is operated quickly.

Jiang Feng felt bored, and went back to his room, preparing to recruit two medical soldiers to help his mother see a doctor! Meniere's syndrome is difficult to treat, but mercenaries are even better.

The second-level [Medic] medical skill is against the sky!

He is good at traditional Chinese medicine/western medicine/pharmacy, internal medicine and surgery, injection and prescription surgery, midwifery, acupuncture and moxibustion, and research and development of Chinese and Western medicine.