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Several materials for making metal stamping

    Several materials for making metal stamping
    With the development of science and technology and the changes of the times, the metal stamping industry has gradually penetrated into people’s lives. Product parts from stamping parts can be seen everywhere in life, ranging from the daily necessities commonly used in people’s lives to large parts such as aerospace. Metal stamping parts, since the use of metal stamping parts is so wide, what are the commonly used materials?
    Metal stamping
    1. Hot rolled steel plate
    Hot-rolled steel is a high-quality carbon structural steel with a carbon mass fraction of 0.1%~0.15%. It is a low-carbon steel. Compared with cold-rolled steel, hot-rolled steel is cheaper and has higher plate thickness and strength. Therefore, it has a wide range of applicability in the stamping field, especially in the automotive metal stamping parts, hot-rolled steel plate occupies a considerable proportion, commonly used in beams, longitudinal beams, chassis structural parts, support parts and manufacturing formability requirements High parts;
    2. Cold rolled steel plate
    There are many classification methods for cold-rolled steel plates. According to the deoxidation method, it can be divided into boiling steel, killed steel and semi-killed steel; according to the steel type and alloy composition, it can be divided into low carbon steel, low alloy high strength steel, phosphorous steel, and ultra-low carbon steel. Non-interstitial atomic steel, etc.; according to the strength level, it can be divided into ordinary strength level and high strength level; according to the stamping level or use, it can be divided into general use, stamping use, deep drawing use, extra deep drawing use, and ultra deep drawing use;
    Three, stainless steel
    Stainless steel refers to a high-alloy steel with a mass fraction of chromium reaching more than 11%. Its main characteristics are high corrosion resistance and heat resistance, rust resistance and surface brightness. The stainless steel used in stamping has Ferritic stainless steel, austenitic stainless steel and martensitic stainless steel. The stamping performance of ferritic stainless steel is close to that of cold-rolled steel plate. In the production process of this kind of stainless steel, hot rolling, cold rolling and annealing methods can also be used to obtain the texture structure, which has good drawing performance. But its hardening index is about 92, and the elongation is 25%~30%, which are less than austenitic stainless steel, so its elongation type stamping performance is poor; among them, SUS430 can be used for stamping forming. Ferritic stainless steel and austenitic stainless steel represented by SUS304;
    Four, coated steel plate
    In order to prevent various acidic or alkaline air, humidity, water, oil and other substances from corroding metal stamping parts, the United States, Japan and other countries have put forward the goal of five years of corrosion resistance of automobile body surface and ten years of resistance to perforation and corrosion. Developed a new coated steel sheet. At present, most domestic automobiles also require the use of coated steel plates with different specifications and quantities; the resistance to powdering and peeling of coated steel plates in stamping and forming will affect its stamping formability. There are two types of coating peeling: the first is the formation of particles due to the internal failure of the coating, the particle size is generally smaller than the thickness of the coating, and it falls off in the form of powder, which is called chalking; the second is due to the adhesion failure between the coating and the substrate Formed flake particles, the size of the particles is generally similar to or larger than the coating