摘要:
To produce sheet steel components optimised for loading, a steel strip is cast between two cooled rolls with a variable nip and the thickness of the steel strip is changed by changing the time of contact between the strand shells and the rolls or by changing the cooling intensity of the rolls on the molten steel cast into the gusset formed by the rolls, thereby changing the thickness of the steel strip. Such a strip has a homogeneous structure and can subsequently be given a special quality by hot or cold rolling for its particular purpose of use.
摘要:
A process for producing metal parts in accordance with the principle of squeeze or forge casting wherein a permanent mold (2) is provided having a mold cavity, a seal (4) is placed on an upper edge flange (5) of the mold surrounding the cavity opening (6), liquid metal (9) is introduced into the cavity, an upper die (3) is inserted (7) into the cavity such that the level of the liquid metal is raised until the higher-level cavity created by the seal (4) is filled, the metal is at least partially solidified, and the final shape of the part is produced by pressing (9) in the upper die, with deformation and spreading of the seal. The result is a completely dense workpiece of excellent dimensional stability which has the texture of a forged part and is correspondingly of very high strength.
摘要:
A process of producing profiles whose cross-section is variable in the longitudinal direction, characterized by the process stages of cutting a blank 31 with a substantially constant width along a longitudinal direction, deforming the blank 31 by deep-drawing to form an open profile whose cross-section is variable along the longitudinal direction, and cutting the flanges projecting from the open profile.
摘要:
A casting roll for a two-roll casting device for the casting of metallic strip from a metal melt, in particular a steel melt, includes a roll body, on a casing surface of which a coating consisting of a coating material is applied by thermal spraying, which has a higher degree of hardness than the roll body. The casting roll according to the invention and the two-roll casting device, while easy to manufacture, has not only a long service life, but also allows for the manufacture of cast strips of optimum quality. This is achieved by the fact that the free surface of the coating, after thermal spraying, has a peak number RPc of at least 10 cm−1.
摘要:
A method of shaping planar parts which have an elastic and plastic range for making components which are curved two dimensionally around two axes under utilization of a high pressure peening shot beam comprises the steps of tension positioning the part to obtain through elastic deformation to obtain the desired contour; peening the surface of the part to be deformed by running a beam of shot along track lines which are essentially lines of equal strain in the parts to be made; controlling the peening shot beam energy such that more central parts receive shot at a higher energy than more peripheral parts of said part; repeating the aforementioned steps on the other side of the part; and separately peening shot treating at least some of thicker edge parts, so as to obtain plastic deformation.
摘要:
A method is provided for shaping an object consisting of a material which is both elastic and capable of permanent deformation, by deforming said object with a blast of solid particles.