Cold-forming die steel collars anticentripetal composite casting technique for rail beam and section

Abstract

The invention discloses a centrifugal composite casting technology for a cold working die steel roll collar used for a rail beam and section mill. The chemical compositions by weight percentage are as follows: outer layer compositions: 1.2 to 2.0 percent of C, less than 0.05 percent of P, less than 1.0 percent of Si, less than 0.05 percent of S, less than 1.0 percent of Mn, less than 1.0 percent of Ni, 10 to 15 percent of Cr, 0.1 to 1.0 percent of Mo, 0.1 to 1.5 percent of V, and the balance being Fe; core compositions: 1.2 to 3.0 percent of C, less than 0.05 percent of P, 1.0 to 3.0 percent of Si, less than 0.05 percent of S, 0.5 to 2.0 percent of Mn, less than 1.0 percent of Cr, less than 1.0 percent of Ni, less than 1.0 percent of Mo, and the balance being Fe. The centrifugal casting technology is adopted to manufacture the cold working die steel roll collar used for various rail beam and section mills; a core adopts high-toughness graphitic steel when the outer layer obtains high wearing resistance; and reasonable casting parameter matching is designed to guarantee the good combination of cold working die steel and the core. Compared with products produced by the prior forging method, the technology has equivalent application effect and low manufacturing cost, and the performance-price ratio is far higher than that of the forging production method. The technology realizes the casting which substitutes the forging, and satisfies the development direction of the industry.

Description

technical field [0001] The invention relates to a roll ring centrifugal composite casting technology, in particular to a cold working die steel roll ring centrifugal composite casting technology for rail and beam rolling mills. Background technique [0002] At present, the cold-work die steel roll rings used in various rail and beam rolling mills usually adopt forging process. Due to the narrow temperature range in the forging process, the forging process is very difficult, and cracks are prone to occur during the forging process, which is not good in technology and economy. Reasonable. Contents of the invention [0003] The object of the present invention is to overcome the above disadvantages, change forging into casting, and provide a centrifugal composite casting technology for cold working die steel roll rings for rail and beam rolling mills. [0004] The technical scheme adopted in the present invention is: [0005] The chemical composition of the cold working die ...

AI Technical Summary

Problems solved by technology

[0002] At present, the cold-work die steel roll rings used in various rail and beam rolling mills usually adopt forging process. Due to the narrow temperature range in the forging process, the forging process is very difficult, and cracks are prone to occur during the forging process, which is not good in technology and economy. Reasonable