Composite carbon tool steel/plain carbon steel metallurgical lining board with high resistance, high uniformity and long service life

Abstract

The invention discloses a composite carbon tool steel/plain carbon steel metallurgical lining board with high resistance, high uniformity and long service life. Aiming at characteristics of an explosive composite wear-resistant material and operating requirements of a metallurgical wear-resistant lining board, the surface induction heating principle and the metal phase transformation theory are used for controlling the depth of heat penetration, the hardness of an appropriate layer interface, and the depth and uniformity of a quench hardening layer so that the hardness of the composite layer is distributed in gradient, and the complete martensite phase change is avoided from occuring in the composite interface layer during quenching so to reduce the structure stress formed on the interface and keep the original combination state of the composite board to the greatest extend. The composite metallurgical lining board with high resistance, high uniformity and long service life has surface hardness of larger than 61HRC (rockwell hardness) and uniformity of hardness of less than 3 HRC (rockwell hardness); A 5mm place of the composite layer in the thickness direction has a hardness value of larger than 50HRC (rockwell hardness); and the three fifth to four fifth place of the composite layer thickness has the hardness value of less than 35HRC (rockwell hardness).

Description

Technical field: [0001] The invention relates to a carbon tool steel / common carbon steel high wear resistance, high uniformity and long service life metallurgical composite liner manufactured by explosive welding technology and special medium frequency induction quenching process, which belongs to the manufacture of metallurgical machinery and equipment and the heat treatment of composite materials Comprehensive process technology. Background technique: [0002] The wear-resistant metal composite liner is made of two materials (multilayer + base layer) through explosive welding. -10mm. The base layer is low-carbon steel with high impact toughness, the main grades are Q235, Q345, etc., and the thickness is 20-40mm. The processing of metal composite liners for wear-resistant metallurgy involves two special technologies of explosive welding and heat treatment. The current production status of the products is based on the materials of the composite plates and the technical req...

AI Technical Summary

Problems solved by technology

[0014] Warping deformation will occur after quenching. The amount of deformation is related to the thickness of the substrate, the heat penetration depth and temperature uniformity, and the quenching width. When the heat penetration depth reaches more than 10mm and the quenching width reaches more than 500mm, different degrees of deformation will occur. Conventional manual operation cannot control the amount of deformation