Effect of cold stamping sheet model bearing NN3928MBKRCC1P4

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Thickness tolerance of 1 steel
The thickness of the steel plate of model bearing NN3928MBKRCC1P4 tolerance is the actual thickness exceeds the standard deviation allowed, it not only affects the parts stamping cracking, surface wrinkling, the springback value, even may cause significant die accident. This is one of the three elements of punching failure.

model bearing NN3928MBKRCC1P4
Plate thickness tolerance ripple, actually affect the mold to exert pressure on the size of the part, the metal flow easily, thus affecting the cracking and wrinkling parts stamping.
Defects on the surface of 2 steel
According to the regulations, the surface of model bearing NN3928MBKRCC1P4 hot rolled steel plate shall not have cracks, scarring, folding, bubble, layered and laminated on the use of harmful defects. But allowing the depth (or height) shall not exceed the thickness tolerance of half of the pits, depression, scratches and other minor, local defects, and ensure the minimum thickness.
Any surface defects of cold rolled and hot rolled steel plate exists, especially beyond the surface defects of the standard permit, will become the direct cause of stamping cracking, paint quality and appearance quality.
Chemical composition of 3 steel
(1) carbon. Carbon is a basic element in steel, it improves the strength of steel plate, particularly the tensile strength.
(2) silicon. Silicon can improve the strength of model bearing NN3928MBKRCC1P4 cold rolled steel sheet.
(3) mn. The beneficial effect can prevent the steel peroxidation and cold-rolled steel plate edge to avoid cracking.
(4) P. Has the good function of cold rolling and annealing. But p with cold brittleness, also have adverse effects on welding performance.
(5) sulfur. Useless elements harmful to stamping.
(6) aluminum. To prevent aging, plate as deoxidizer, is conducive to the deep drawing properties.

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Introduction

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