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Stainless Steel Common Smelting Forging Rolling Problems
Shrinkage: The shrinkage cavity formed when the liquid steel shrinks in the steel mold is called shrinkage.
Transverse cracks: Transverse cracks occurring on the surface of the ingot, generally on the ingot, generally shallow in depth, and can be removed by fine grinding.
Longitudinal cracks: These are longitudinal cracks produced on the surface of the ingot, usually in the upper part of the ingot and in the corners, while the cracks in the upper part are very deep and difficult to be eliminated by grinding.
Scarring: the surface of the ingot, shell skin or tumor-like metal splash adhesion is called scarring, scarring appears in the lower part of the ingot.
Heavy skin: at the edge of the low-power test piece, showing an irregular dark sparseness when it is surrounded by a large number of oxides gathered inclusions, (mainly ferrous oxide) which is called flipping compound.
Surface inclusions: non-minus inclusions that are visible to the naked eye on the surface of the ingot.
Surface porosity: refers to the exposure of the surface of the ingot visible to the naked eye small holes, mostly in the lower part of the ingot, generally not deep, can be removed by finishing.
Frying: Cracking produced when the surface of the ingot is extremely cold, often mixed with a loud crack, so it is called cracking.
Rising: The head of the ingot is irregularly raised, which is a defect called rising, also called bubbling up.
Reticulation: The net-like projections on the surface of the ingot are called reticulation.
Pit: A pit on the surface of an ingot is called a pit.
Double casting: clearly visible rejoining marks around the surface of the ingot
Flying Edge: A thin piece of metal that exists perpendicular to the surface of the ingot at the head or tail of the ingot is called a flying edge.
Flying Fin: A thin sheet formed perpendicular to the surface of the ingot is called a flying fin.
Bubbles: Bubbles are due to steel deaeration deoxygenation ** or injection steel system raw material moisture and other reasons and caused by ingots or just now defects, generally divided into subcutaneous bubbles and internal bubbles. (Prevention methods: steel oxidation boiling reduction deoxygenation to be good, furnace chat and all contact with steel refractory materials to be dry, out of the steel tanks, buns, hand boards, molds, etc. to be dry, mold rust spots should be cleaned up, coated with oil to be thin and even.)
White point: white point is actually a kind of fine crack, in just transverse low times specimen was radioactive irregular sawtooth crack, in the longitudinal low times specimen is a round or elliptical star of the silver bright spot, and thus called white point. (The main cause is the cause of hydrogen) Stainless steel common smelting, forging, rolling problems
Forging and forging are a kind of forging process, each has its own advantages and disadvantages, the choice of which method depends mainly on the processing requirements and material properties. In practice, it is often necessary to choose the appropriate process method or a combination of processing according to the specific circumstances, in order to achieve better results.
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Forging factory production of forgings products of different shapes, different forgings products composed of mechanical parts are also different sizes. Forging plant according to the shape of different shapes of forgings used in different processing methods, a variety of cutting and processing of forgings are also a variety of methods. Forging plant commonly used processing methods are turning, drilling, boring, planing, broaching, milling and grinding and several other forging processing methods. Although this...
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Forging low times the organization defects (1) large grain: if the beginning of the forging temperature is too high and the degree of deformation is not enough, or the end of the forging temperature is too high, or the end of the forging deformation falls into the critical deformation zone may be in the steel forging low times the organization of coarse grain defects. Aluminum alloy deformation degree is too large, the formation of weaving; high temperature alloy deformation temperature is too low, the formation of mixed deformation organization can form coarse grain. Coarse grain make...
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