Heat treatment device and heat treatment method for 18Ni350 maraging steel

CN116694918BActive Publication Date: 2026-07-14ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Filing Date
2023-06-05
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The existing 18Ni350 martensitic aging steel has poor plasticity and toughness, which makes the material prone to fracture during use, especially when subjected to impact, resulting in a shorter lifespan and increased costs.

Method used

A heat treatment apparatus and method for 18Ni350 martensitic aging steel is described, comprising a heating chamber, a cooling chamber, a sample moving mechanism, a gas purification mechanism, and a water cooling mechanism. Through solution treatment, low-temperature solution treatment, aging treatment, and low-temperature aging treatment, nanoscale precipitated strengthening phases are generated using titanium and molybdenum elements, which refines the matrix structure and increases the number of precipitated strengthening phases.

Benefits of technology

It significantly improves the plasticity, toughness, and tensile strength of martensitic aging steel, extends the service life of the material, reduces the cost of using the material, and the workpiece surface is free of oxide layer and has a uniform structure.

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Abstract

The application discloses a kind of 18Ni350 martensitic age steel heat treatment device and heat treatment method;Including being located in heating chamber of furnace body, cooling chamber, sample moving mechanism, gas purification mechanism and water cooling mechanism;Heating chamber is located in the left side of cooling chamber, and the left part of heating chamber is provided with feeding port, and feeding port is provided with feeding port sealing cover;A plurality of heating elements are arranged on the chamber wall of heating chamber, a first temperature and pressure sensor is arranged in the heating chamber, a supporting table is arranged in the heating chamber, a first opening is arranged in the right part of heating chamber, and a heating chamber electric furnace door is arranged on the first opening;The application has the characteristics that the toughness and plasticity of 18Ni350 martensitic age steel are significantly improved, the workpiece surface is free of oxidation layer, the surface is smooth, the structure is uniform, and the service life of the material is improved.
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