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Introduction of several materials for making metal stamping parts

by:Fortuna     2021-03-05
The materials used in the production of metal stamping parts usually depend on the requirements of production design and functionality. When selecting metal stamping parts, the stamping performance of the material should be evaluated scientifically and reasonably, and the relationship between the stamping performance of the sheet and the stamping process should be correctly grasped, as follows We briefly introduce a few metal stamping parts materials; 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%, which belongs to low-carbon steel, compared with cold-rolled steel plate , Hot-rolled steel plate is cheaper, thicker and stronger, so it has a wider range of applicability in the stamping field, especially in the automotive hardware stamping parts, hot-rolled steel plate occupies a considerable proportion, often used in beams, Longitudinal beams, chassis structural parts, supporting parts and parts with high manufacturing formability requirements; 2. Cold-rolled steel sheets There are many classification methods for cold-rolled steel sheets. According to the deoxidation method, they can be divided into boiling steel, killed steel and semi-killed steel; According to steel type and alloy composition, it can be divided into low carbon steel, low alloy high strength steel, phosphorous steel, ultra-low carbon non-interstitial atomic steel, etc.; according to the strength level, it can be divided into ordinary strength level and high strength level; according to 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; third, stainless steel refers to high alloy steel with a mass fraction of chromium reaching more than 11%, and its main feature is that it has high The corrosion resistance and heat resistance, rust resistance and surface brightness, stainless steel used in stamping and forming include 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 sheet. 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, 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 to prevent the corrosion of metal stamping parts by various acid or alkaline air, moisture, water, oil, etc., the United States, Japan and other countries have put forward the goal of five years of corrosion resistance on the surface of automobile bodies and ten years of resistance to perforation and corrosion, and they have developed new coated steel plates. At present, most domestic automobiles also require the use of coated steel plates of different specifications and quantities; the resistance of the coated steel plate to powdering and peeling during stamping 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 failure of adhesion between the coating and the substrate. The formed flake particles, whose size is generally similar to or larger than the thickness of the coating, fall off in the form of scales, which is called exfoliation. The size and form of the pulverization and peeling of the coating are related to the composition, performance, structure, thickness and forming conditions of the coating. Recommended article: What are the factors to choose stamping materials? Previous post: Working principle of pneumatic punch press for stamping parts processing equipment
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