Alloy ball iron guide disc for precision tube mill

Abstract

The invention provides a new type of alloy ductile iron guide disc for a precision pipe rolling mill. Through different combinations of its components, the comprehensive performance of the material is strengthened, so as to solve its poor wear resistance and easy occurrence of "sticking steel" phenomenon, etc. Disadvantages: The guide plate of the present invention is made of sand casting, and its main components (in weight %) are as follows: C: 3.02% to 3.55%, Si: 1.55% to 2.1%, Mn: 0.46% to 0.6%, P: ≤0.03%, S: ≤0.03%, Cr: 0.3%~0.13%, Ni: 2.2%~3.4%, Mo: 0.58%~1.0%, Mg: ≥0.04, the rest are Fe and other unavoidable impurities; The invented material structure is uniform inside and outside, the wear resistance and toughness are greatly improved, and the service life is doubled. In the process of rolling precision alloy seamless steel pipe, it overcomes the disadvantage of "sticking steel" of the ductile iron guide plate in the prior art. , There is no scratch on the surface of the steel pipe, which ensures the normal production and improves the production efficiency. Its service life is 3 to 4 times that of the existing guide plate.

Description

technical field [0001] The invention relates to a guide plate for a pipe rolling mill, in particular to an alloy ductile iron guide plate for rolling a thin-walled seamless steel pipe and an alloy steel pipe by a precision pipe rolling mill. Background technique [0002] The guide plate of the pipe rolling mill is a necessary tool and die in the production process of rolling seamless steel pipes in precision pipe mills. It works with the rolls at the same time to complete the deformation of seamless steel pipes in this process. In a high-temperature environment (about 1100°C), it bears rolling and sliding friction under the action of compressive stress, and at the same time bears the cooling and heating action of cooling water. The working environment is harsh and the consumption is large. The material of the precision pipe rolling mill guide plate currently used is chromium molybdenum copper infinite chilled ductile iron, and its main components are: carbon C; silicon Si; m...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the phenomenon of hardness, low strength and "sticking steel" existing in the guide plate of the precision pipe rolling mill in the use process, and propose a new type of alloy ductile iron guide plate for the precision pipe rolling mill. The different combinations of its components and heat treatment strengthen the comprehensive performance of the material, and are used to replace the current chrome-molybdenum-copper infinite chilled ductile iron guide plate to solve its poor wear resistance, easy to produce "sticking steel" phenomenon, and Seriously affect the production of thin-walled seamless steel pipes and alloy seamless steel pipes and other shortcomings