A production method of high-efficiency saving type alloy tool steel wire rod

By combining high-temperature diffusion process with water cooling temperature control during the rolling of the finishing mill, the problem of brittle fracture of alloy tool steel wire rod during packaging and transportation was solved, and the uniformity of wire rod structure and the stability of the drawing process were achieved.

CN117587211BActive Publication Date: 2026-06-26ZENITH STEEL GROUP CORP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZENITH STEEL GROUP CORP CO LTD
Filing Date
2023-11-29
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Alloy tool steel wire rods have high hardness, making them prone to brittle fracture during packaging, transportation, and user processing.

Method used

The high-temperature diffusion process is used for segmented heating, combined with rolling in the finishing mill and water cooling to control the temperature. Through high strain rate rolling in the non-recrystallization zone, combined with air cooling after wire drawing and air cooling before packaging, the bainite phase transformation ratio is controlled to avoid the precipitation of martensite and ferrite, ensuring that the wire rod does not break brittlely during packaging and transportation.

Benefits of technology

This achieves uniform microstructure in alloy tool steel wire rods, avoids brittle fracture during packaging and transportation, and ensures no abnormal breakage during the drawing process after annealing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of wire rod production, in particular to a production method of high-efficiency and energy-saving alloy tool steel wire rod, and production steps of the method comprise the following steps: (1) cogging; (2) heating; (3) rolling: adopting a finishing rolling unit to roll, the temperature of an intermediate blank entering the finishing rolling unit is 900-910 DEG C, the temperature of the intermediate blank leaving the finishing rolling unit is 900-920 DEG C, so that the difference between the temperature of the intermediate blank leaving the finishing rolling unit and the temperature of the intermediate blank entering the finishing rolling unit is less than or equal to 20 DEG C; (4) cooling; (5) packing, the temperature of entering and leaving the finishing rolling unit is controlled by the cooling water pressure between the finishing rolling unit racks, high-strain-rate large deformation rolling in a non-recrystallization zone increases the dislocation and substructure density in supercooled austenite, and the produced deformation storage energy.
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