Heat processing process for lockset material and equipment thereof

Abstract

The invention relates to a heat processing process for a lockset material and equipment thereof. The material is 25CrMnSi. The heat processing process comprises the following steps of: normalizing at the temperature of between 920 + / -10 DEG C, keeping the temperature for 120 minutes, and cooling by air; quenching at the temperature of 880 + / -10 DEG C, keeping the temperature for 180 minutes, and cooling by water; tempering at the temperature of between 610 + / -10 DEG C, keeping the temperature for 180 minutes, and cooling by the air. The invention also provides heat processing equipment corresponding to the method. The lockset material prepared by the heat processing process and the heat processing equipment have the following properties: the tensile strength of the lockset material is 850MPa, the yield strength is 700 MPa, the brinell hardness (HB) is between 240 and 280. And the heat processing process and the heat processing equipment have the characteristics of low metal cost, high strength, hardness, plasticity and toughness, simplicity, convenience for operation and small environmental pollution while meeting the mechanical requirements of the lockset material of marine containers.

Description

technical field [0001] The invention relates to a material heat treatment process and equipment thereof, in particular to materials applied to locks. Background technique [0002] The strength, hardness, plasticity and toughness of materials, such as alloy steel, are usually a contradictory unity. Selecting a reasonable alloy composition and content to achieve the optimal alloy material has always been the direction of efforts in the industry. For the special work requirements of the marine container locks, choosing reasonable strength, hardness, plasticity and toughness materials is the technical problem to be solved in this field. [0003] In the prior art, 42CrMo material is used and a corresponding heat treatment process is added at the same time as the material of the lock. The heat treatment includes: [0004] 1. Normalizing: In the mesh belt furnace, the normalizing temperature is 900°C±10°C, and the holding time is 120 minutes, then air cooling; [0005] 2. Quenc...

AI Technical Summary

Problems solved by technology

For example, the existing material 42CrMo uses alloy steel with precious metals, and its material cost is relatively high; at the same time, during the heat treatment process, especially after quenching, the amount of bent-crystal martensite begins to increase, and its plasticity and toughness are poor; Furthermore, the process in heat treatment is relatively complicated, and the cost is high. At the same time, heat treatment is easy to produce more environmental pollution.

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