Half a month passed in a blink of an eye, and at this time, the cooperation between Lin Qiangsheng and the Commission of Science, Technology and Industry for National Defense began to show its power. The Commission of Science, Technology and Industry for National Defense can command many domestic industrial departments and enterprise units, especially the top domestic high-tech military units and scientific research institutes. These units have good basic conditions, sufficient researchers, relatively new equipment, and the power of the Commission of Science, Technology and Industry for National Defense is very large; as the competent department, it can completely mobilize these military production enterprises and scientific research institutes to carry out supporting related research and processing and production for the experimental projects in Harbin Institute of Technology.

Lin Qiangsheng not only used several five-axis machine tools in his own underground research laboratory to process complex parts for the project team, but also saw that Chen Bin and Zou Jiahua were able to mobilize so many scientific research units, and the project team also received strong support from the University of Technology. Experts, professors and researchers from the disciplines of mechanical casting, metal materials and heat treatment also participated in the research project, and he excitedly proposed a new research plan to the two leaders, and with the consent of Chen Bin and Zou Jiahua, he successively established the laboratory of automotive metal materials and the laboratory of automotive non-metallic materials (composite materials such as automotive engineering plastics and ceramic materials).

Lin Qiangsheng regards the research of automotive materials as particularly important, with the international more and more attention to automobile performance, automotive environmental protection, automobile safety and other indicators, the world's famous automobile companies are moving towards the goal of more fuel-efficient, lighter, stronger and more comfortable research and development, aluminum alloy, ultra-high strength steel, high-grade engineering plastics and other new materials will become the focus of sales competition of automobile companies.

The research projects of the metal laboratory led by Professor Li Xun, an expert in metal materials, include (yield strength) high-strength steels above the strength level of 340MPa, ultra-high-strength steels of 590MPa, 700MPa, and 980MPa, as well as girder steel plates with a yield strength of 500MPa~600MPa, and even more advanced 700MPa~800MPa yield strength girder steel plates.

In the 21st century, the steel strength of the frame of advanced commercial vehicles in the world has reached the level of 700MPa~800MPa. In North America, some cars also use heat-treated frames above 1200MPa, and the weight of the frame is significantly lower than that of similar domestic products. At present, the level in Europe and the United States is also 500MPa~600MPa. Some luxury cars in North America reach the highest level of 800MPa~900MPa.

Although the domestic gap is a bit big, in the early 80s, the steel products produced in China were generally at the level of 200MPa, and the output of high-strength steel was small and the level was low, but for the development of the automobile industry, the domestic steel technology must catch up!

Lin Qiangsheng put forward the requirement that we must catch up with the advanced footsteps of foreign countries, and replace ordinary carbon steel with high-strength low-alloy steel with better performance, which can not only greatly reduce the weight of the car and reduce fuel consumption. And it's also about making the car safer.

Li Xun and other metal experts and scholars also know that the development of high-strength alloy steel is an urgent need of the country, which can not only greatly save steel consumption, but also reduce the pressure on resources, energy and the environment. There is no doubt that the only way to achieve the sustainable development of China's steel industry is to vigorously promote the application of high-strength low-alloy steel. Therefore, the Institute of Metal Materials of the Chinese Academy of Sciences happily accepted this research project.

In terms of leaf springs, the design full-load static stress level of domestic variable-section leaf springs is generally 200MPa~250MPa, which is slightly higher than the level of equal-section leaf springs, but lower than the full-load static stress level of 650~750MPa of internationally renowned commercial vehicle leaf springs. In order to achieve the purpose of exporting cars to earn foreign exchange. This commercial vehicle leaf spring index must also be compared with foreign countries, and it is also necessary to overcome technical difficulties at home.

There is also the manufacturing process of aluminum alloy wheels produced by low-pressure casting process, at present, domestic cars are also generally using steel wheels, some imported cars are using aluminum alloy wheels, and steel wheels will soon be eliminated from the range of use of cars in foreign countries. China must also keep up with the market, and the research on the manufacturing process of aluminum alloy wheels has also been handed over to the Metal Research Institute to overcome.

In addition, there are aluminum alloy cylinder head manufacturing and processing technology, a new type of HT200 type gray cast iron with a minimum tensile strength of 200MPa, and a pre-research on the tensile strength of 250MPa gray cast iron, as well as cylinder rings, valves, crankshafts, camshafts, and the materials of these spare parts should be developed in the direction of higher strength and wear resistance.

Fortunately, as the Institute of Metal Research of the Chinese Academy of Sciences, there are a large number of scientific researchers. The number of experts alone has reached more than 100, and there are more than 20 leaders of various projects.

Director Li Xun did not hesitate after receiving the task. He knows that these studies on the metal materials of cars are now an important task entrusted to the Institute of Metal by the state. He divided the team into two, and Lei Tingquan, director of the Department of Metal Materials and Heat Treatment of the University of Technology, was in charge of the research project, and Li Xun, director of the institute, returned to the Institute of Metal Research, Chinese Academy of Sciences, Shen Y, to arrange and lead the scientific research task.

Recently, Chen Bin told Lin Qiangsheng that after the central leadership decided to solve the problem of car metal material production, the state will establish two experimental hot-dip galvanizing units with an annual output of 80,000 tons and complete production lines in Beiman Special Steel Plant. to produce galvanized sheets for cars. In addition, Beiman Special Steel will also cooperate with the research project of car metal materials, and improve the production process through national appropriations and self-raised funds to build or import new production equipment, so as to produce high-strength alloy steel and ultra-high-strength alloy steel to meet the needs of the domestic car industry.

This good news made Lin Qiangsheng overjoyed, the country was able to let Beiman Special Steel supply car metal products, which shows that the central leadership attaches great importance to his requirements! Beiman Special Steel is not only close to Bincheng. Moreover, this is a veteran military enterprise, and the state can make this unit cooperate with the manufacture of automotive metal materials, which must have been carefully considered, and the manufacture of automotive metal materials is quite important!

In addition to these, Lin Qiangsheng also suggested to Chen Bin and Zou Jiahua to pay attention to the research of non-metallic materials and composite materials such as engineering plastics. He also specially invited many experts and scholars from the Institute of Chemistry of the Chinese Academy of Sciences to visit Bincheng, and Lin Qiangsheng took care of all the food, housing and transportation, just to invite these experts, scholars and researchers from BJ, SH, Hefei and other places.

In the past, the domestic research in the field of engineering plastics is not strong, although the domestic 50s began to develop the plastics industry, but it has always been in the stage of technological backwardness, not only the product performance is not good, the quality is poor, and the product process performance is not good. The products produced are not beautiful and easy to fade, brittle, cracked, rough, and single color are the characteristics of such composite products such as domestic engineering plastics.

Lin Qiangsheng knows that it is in the new material of the car. The proportion of engineering plastics is getting more and more attention, and developed countries regard the amount of plastic used in automobiles as an important symbol to measure the level of automobile design and manufacturing! At present, Germany has the largest amount of automobiles, accounting for more than 15% of the materials used in the whole vehicle.

In the early 80s, Europe and the United States successively formulated smog, energy conservation and emission reduction, and stricter fuel consumption regulations, prompting car companies to spare no effort to develop automotive lightweight technology. The lightweight of automobiles is mainly reflected in the optimization design of automobiles, the application of alloy materials and non-metallic materials, and the three development directions are 10%~15%, 30%~40%, and 45%~55% of the lightweight and weight reduction of automobiles. The "weight reduction" effect of non-metallic materials such as engineering plastics is the most obvious, and its main role in automobiles is to make automobiles lightweight. And it's easy to make customers feel more upscale than iron. At present, more and more automotive parts are beginning to use engineering plastics instead of metal parts.

Lin Qiangsheng put forward the idea of using high-grade engineering plastics for the tail, fenders, front and rear bumpers, etc., and at present, the domestic products for Binqi are low in life, easy to fade and easy to wear, which has seriously reduced the grade of Jetta brand cars. This time, he took advantage of the rare opportunity to cooperate with the Commission of Science, Technology and Industry for National Defense to propose a research project to Chen Bin and Zou Jiahua, two directors and deputy directors.

Research and manufacture of a series of advanced lightweight materials, such as: PA/PPO alloy front fenders, PC/PBT alloy pedestrian protection energy absorbing blocks, PVC materials for instrument panels and interior doors, as well as long glass fiber reinforced polypropylene materials with better process performance, higher strength and rigidity, and superior bending performance for instrument panels and interior door modules of high-end vehicles.

"Replacing metal parts with plastic parts not only reduces the weight of the vehicle. Reducing fuel consumption and emissions can also improve the power, comfort and safety of automobiles, so its future development is bound to be widely used in automotive power and chassis systems, interior and exterior decoration parts, automotive electronics and other components. Polyamide (PA) materials are mainly used in power, chassis parts and structural parts, accounting for about 20% of the total vehicle plastics; Polycarbonate, polyoxymethylene, modified polyphenylene ether and thermoplastic polyester and other materials are mainly used in electronic and electrical parts and structural parts, accounting for about 15% of the total number of vehicle plastics. Modified polyphenylene ether (PP) and ABS engineering plastics and their alloy materials are mainly used in interior and exterior parts. With the improvement of vehicle grades, the application of engineering plastics increases, and the proportion of ABS and its alloys increases. For example, the use of long glass fiber reinforced composite materials instead of metal exterior trim parts can reduce the impact of external objects (including pedestrians) on the body; Plastic products also have the ability to absorb and attenuate vibration and noise. It can improve the comfort of the ride; The use of plastic as body covering is very suitable for use in heavily polluted areas; Steel parts are easy to rust and corrode metal if the paint surface is damaged or the early corrosion protection is not done well, but automotive plastics are highly corrosion-resistant. The corrosion resistance of plastics to acids, alkalis, salts, etc. is greater than that of steel plates. Furthermore. The cost of replacing metal parts with plastic parts can be reduced by 30%~40%. The specific gravity of general plastics is 0.9~1.6, and the specific gravity of glass fiber reinforced composites will not exceed 2.0, while A3 steel is 7.6, brass is 8.4, and aluminum is 2.7. This makes plastic the material of choice for lightweighting in automobiles. The use of plastic can reduce the weight of parts by about 40%. At the same time, the total manufacturing cost of the car can also be greatly reduced. Our country has long put forward the development plan of replacing steel with plastic and replacing iron with plastic, but in recent years, we have seen that the development of the domestic plastic industry is not satisfactory, and many cutting-edge research is really only at the level of cutting-edge research, and the development of the car industry must allow us to catch up with developed countries, which is urgently needed. Otherwise, Binqi's plan to earn foreign exchange through exports will be difficult to achieve! Lin Qiangsheng told the comrades from the Institute of Chemistry of the Chinese Academy of Sciences from the capital about the application of automotive engineering plastics and the arduous task of developing the engineering plastics industry.

He stood on the podium, with a long blackboard behind him, and an imported Sharp projector beside him, which had not yet entered the domestic market. At this time, the advanced projector provided by Lin Qiangsheng undoubtedly attracted a lot of attention, he borrowed a large classroom of the University of Technology to introduce the research project to experts and professors, but people kept coming in at the door, but most of them focused on this brightly colored projector and car image.

At this time, an old expert from Sinochem raised his hand, and he stood up directly without waiting for Lin Qiangsheng and said: "This little comrade, you just mentioned the use of engineering plastics to make bumpers and car tails. I have always wondered if these two parts can be made of engineering plastics. Shouldn't bumpers be made of steel? How do you use engineering plastics? Aren't you fooling people, what if you get killed in an accident? ”

Suddenly, the experts and professors of the Institute of Chemical Industry laughed, some nodded in approval and some were noncommittal. In any case, the performance of most of the materials that Lin Qiangsheng said just now is still correct, but it is difficult to study these new materials, Lin Qiangsheng choked these experts and professors depressed enough, and they seized a problem to criticize Lin Qiangsheng out of a breath, but the bumper and tail made of plastic are really not within the scope of many people's cognition, which makes many experts hard to believe.

Lin Qiangsheng nodded with a smile and said: "As we all know, plastic is a soft and thin material in many people's minds, and it is characterized by not being able to withstand heavy pressure. But! Can the experts here deny that the development of modern chemistry can make engineering plastics produce better performance by adding special materials, such as glass fibers and other additives? ”

The experts and professors of the Sinochem Institute sitting in the front row shook their heads secretly, indeed, as Lin Qiangsheng said, by improving engineering plastics, it is indeed possible to manufacture materials with better performance. However, traditional thinking restricts these domestic experts and makes them dare not imagine, and conservative thinking seriously restricts domestic scientific and technological innovation, which is also an important reason for the large number of experts, professors and researchers to study abroad. In foreign countries, they can see the most cutting-edge science and technology, have access to the latest research equipment, and can open up their minds and grow their horizons. Compared with China, the research environment abroad is much freer, and there is also a good atmosphere for innovation.

Lin Qiangsheng continued: "Different fiber-reinforced thermoplastic composites based on polypropylene resin, whether GMT, SR-PP or LGFPP, have some common characteristics, namely: compared with metal materials, they have the characteristics of low density, light weight, high specific strength, corrosion resistance, and easy molding; Compared with thermosetting composite materials SMC and hand lay-up FRP, they have the characteristics of short molding cycle, good impact toughness, and renewable utilization. In particular, the characteristics of renewable use make it very suitable for the requirements of new environmental protection laws in Europe and the United States! ”

"In addition, as far as I know, automobile companies such as Toyota and Honda in Japan, as well as automobile companies such as General Motors, Ford and Chrysler in the United States are all researching new materials, and bumpers made of engineering plastics are also an important project for their research! In addition, experts and professors may not know that the bumper of the Jetta sedan produced by Binqi is made of engineering plastics, and this car has also been exported to more than 1,000 developed countries in Europe and the United States! ”

After Lin Qiangsheng finished speaking, the experts, professors and researchers of the Institute of Sinochem from the capital were immediately in an uproar, they didn't expect that even foreigners would buy such cars, it seems that engineering plastics can really make bumpers! (To be continued......)