A method for processing duplex stainless steel

By establishing two-phase material corresponding solution model and microhardness solution model, optimizing the tool front angle and cutting usage, the problem of uneven distribution of microhardness between the two phases during cutting S32760 is solved, and the uniformity of stress distribution and processing quality are improved.

CN118246190BActive Publication Date: 2025-04-18HARBIN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202410100608.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-21
Publication Date
2025-04-18
Estimated Expiration
2043-03-21

AI Technical Summary

Technical Problem

During the cutting S32760 process, the microhardness distribution of the two phases in the shear zone is uneven, resulting in inconsistent stress distribution, which is difficult for the existing technology to effectively solve this problem.

Method used

Establish a two-phase material corresponding solution model based on stress mixing rules, combine tool front angle and cutting usage to construct a two-phase microhardness solution model, revealing the influence law of tool front angle and cutting usage on the microhardness of the two-phase phases, and obtaining the matching relationship between tool front angle and cutting usage under the condition that the microhardness distribution of the two-phase phase is consistent.

Benefits of technology

By optimizing the tool front angle and cutting usage, the consistency of the microhardness distribution of the two phases is achieved, the uniformity of the stress distribution in the shear zone is improved, and the processing quality of duplex stainless steel is improved.

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Abstract

The present invention discloses a duplex stainless steel processing method, comprising the following steps: S1: establishing a two-phase stress solution model for duplex materials, distinguishing and solving the two-phase stress of the duplex materials; S2: establishing a two-phase microhardness solution model considering the tool rake angle and cutting amount, revealing the influence of the tool rake angle and cutting amount on the two-phase microhardness; S3: revealing the influence of the tool rake angle and cutting amount on the distribution characteristics of the two-phase microhardness in the chips, and obtaining the matching relationship between the tool rake angle and the cutting amount under the condition that the two-phase microhardness distribution is consistent, and optimizing the duplex stainless steel processing method. The present invention reveals the influence of the two-phase stress distribution of duplex materials on the two-phase microhardness through the relevant knowledge of material mechanics. In combination with the relationship between microhardness and plastic strain, a two-phase microhardness solution model considering the tool rake angle and cutting amount is established, solving the problem of uncertain distribution of the two-phase microhardness.
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