Quenching process of wear-resistant steel balls and steel forgings

Abstract

The invention provides a quenching process of wear-resistant steel balls and steel forgings, and relates to the technical field of wear-resistant material production. The quenching process comprises the steps of: firstly placing formed steel balls and steel forgings in a quenching basket; conveying the steel balls and steel forgings to a quenching furnace along a rail by the quenching basket for quenching treatment; and discharging and entering an oil pool for cooling. The quenching process is characterized in that the quenching furnace is divided into front, middle and rear segments, the quenching temperature at the front segment is controlled at 650-750 DEG C, the quenching temperature at the middle segment is controlled at 920-970 DEG C, the quenching temperature at the rear segment is controlled at 980-1050 DEG C, the quenching time is 2-3h each segment, the quenching furnace adopts natural gas combustion for heating, and the natural gas is sprayed to the kiln from the top end of the quenching furnace in a staged manner for combustion. The quenching process has the characteristics that the process is simple, the temperature is easy to control, the heating temperature is balanced, the penetrating capability is strong, the product hardness is improved to 60HRC from original 58HRC, the difference between the surface hardness and core hardness of the product is decreased to 1.5HRC from original 3HRC, and the product quality is further improved.

Description

Technical field: [0001] The invention relates to the technical field of production of wear-resistant materials, in particular to a quenching process for wear-resistant steel balls and steel forgings. Background technique: [0002] Wear-resistant materials are the core of the field of new materials, and play an important role in promoting and supporting the development of high-tech. In the field of new materials research in the world, wear-resistant materials account for about 85%. With the advent of the information society, special wear-resistant materials play an important role in promoting and supporting the development of high-tech. They are key materials in high-tech fields such as information, biology, energy, environmental protection, and space in the 21st century. The focus of research and development in the field of new materials is also the focus of strategic competition in the high-tech development of countries around the world. [0003] At present, wear-resistant...

AI Technical Summary

Problems solved by technology

At present, the quenching furnaces used to process wear-resistant castings are all electric heating, the heating efficiency is not high, the heat energy utilization rate is low, the heating temperature is unbalanced, and the hardness of wear-resistant steel balls, steel forgings and other wear-resistant castings after quenching is not high enough. There is a large difference between the core temperature and the surface hardness

As we all know, electricity is a secondary energy source, and the cost of electricity is high, and the heating speed is slow. The long-term power shortage in our country makes it difficult for enterprises to apply for transformer expansion, and often makes it impossible for electricity-consuming enterprises to produce normally.