Which is better, high carbon steel or aluminum alloy?

- Dec 22, 2020-

Among many metal materials, high carbon steel and aluminum alloy are the most popular among many manufacturers because of their very high cost performance. They are widely used in automobile manufacturing and home appliance manufacturing. In the end, high carbon steel and aluminum alloy, which one has better performance! 

High carbon steel, often called tool steel, has a carbon content from 0.60% to 1.70% and can be quenched and tempered. Hammers, crowbars, etc. are made of steel with a carbon content of 0.75%; cutting tools such as drill bits, taps, and reamers are made of steel with a carbon content of 0.90% to 1.00%. After heat treatment, high hardness (HRC60-65) and good wear resistance can be obtained. The hardness is moderate in the annealed state, and it has good machinability.

aluminium alloy

Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and it has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. With the rapid development of industrial economy, the demand for aluminum alloy welded structural parts is increasing, and the weldability research of aluminum alloy is also in-depth. Aluminum alloy is currently the most used alloy. Good thermal conductivity: The thermal conductivity of aluminum is very high, second only to silver, gold, and copper in metals, and three times that of iron.

Advantages and disadvantages of high carbon steel and aluminum alloy

Advantages and disadvantages of high carbon steel

Advantages:

1. High hardness (HRC60-65) and good wear resistance can be obtained after heat treatment.

2. Moderate hardness in annealed state, with good machinability.

3. The raw materials are easily available and the production cost is low.

The disadvantages are:

1. Poor thermal hardness. When the working temperature of the tool is greater than 200°C, its hardness and wear resistance drop sharply.

2. Low hardenability. The diameter of fully quenched in water quenching is generally only 15-18mm; the maximum diameter or thickness (95% martensite) of fully quenched in oil quenching is only about 6mm, and it is easy to deform and crack.

Advantages and disadvantages of aluminum alloy

Aluminum alloy advantages

Low density: The density of aluminum is 2.7, which is about 1/3 of copper (8.9) or steel (7.8). The low density is very beneficial to the light weight of aerospace vehicles, ships, vehicles and other vehicles and buildings. It can also save moving and processing costs, reduce costs, and be widely used in various fields such as industry, construction, and civil; Good corrosion resistance and weather resistance: Aluminum and aluminum alloys can form a hard and dense oxide film with good corrosion resistance in the atmosphere, which can be further improved by surface treatment such as anodizing, electrophoretic painting, and powder spraying. The corrosion resistance of aluminum;

Good decoration: Aluminum alloy has good plasticity, and can process various specifications and formed products. Through surface treatment, it can produce different properties and different colors of film, which has good decoration;

Disadvantages of aluminum alloy

Aluminum alloy is a brittle and hard material, the tensile strength is close to the yield strength, the toughness is poor, the hardness is low, it is not wear-resistant, not impact-resistant, the thermal conductivity is large, the thermal deformation is large, the thermal stability is poor, and the mechanical strength of the material cannot be improved by heat treatment. .

China is the world's manufacturing plant. Every year, a large number of Chinese manufacturing goes to the world. Chinese manufacturing is becoming more and more popular. With the rapid development of my country's manufacturing industry, a large amount of raw materials are lost every year. Among many raw materials, metal raw materials are the most used. The two most widely used materials in the current market are high carbon steel and aluminum.

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