Check patentability & draft patents in minutes with Patsnap Eureka AI!

Cold-drawing machining process for lead-containing free-cutting steel wire rods

A technology of free-cutting steel and processing technology, which is applied in the field of steel processing technology, can solve problems such as drill bit breakage, uneven straightening, and uneven quality of lower hobbing and milling, so as to meet the needs of production and processing and reduce pollution.

Inactive Publication Date: 2015-01-14
WUXI CHENGBO SCI & TECH DEV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned production process is complicated, and the environment will be polluted due to pickling during production
[0005] Generally, there are still some problems in the processing of finished wire rods, such as uneven straightening, uneven quality of lower hobbing, deviation of drill hole diameter, broken drill bit, cracks at the end of the pressure bead, and difficulty in exporting chips, etc.
Of course, the above-mentioned process defects will also appear in the cold drawing process of lead-containing free-cutting steel wire

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cold-drawing machining process for lead-containing free-cutting steel wire rods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The cold drawing process step of the lead-containing free-cutting steel provided by the present invention is as follows:

[0030] (1) Forging: According to the forging regulations of intermediate frequency furnace steel ingots, the remelted ingots are forged into steel ingots of 50mm×50mm×L;

[0031] (2) Hot rolling: heating, hot rolling, coiling, cooling; the process flow is: feeding in front of the furnace → billet heating → rough rolling at 460 rolling mill → head and tail cutting → intermediate rolling at 350 rolling mill → pre-finishing rolling at 280 rolling mill (rolling room) Water cooling) → cutting head and tail → 250 mill finishing rolling (water cooling between rolling mills) → 210 wire rod mill → spinning coils → water cooling;

[0032] Among them, the hot rolling is heated by pushing the steel pusher into the heating furnace. The heating temperature is 1220°C, and the rolling start temperature is 1100°C. After rolling into a Φ6.5mm wire rod, the wire is sp...

Embodiment 2

[0038] The cold drawing process step of the lead-containing free-cutting steel provided by the present invention is as follows:

[0039] (1) Forging: According to the forging regulations of intermediate frequency furnace steel ingots, the remelted ingots are forged into steel ingots of 50mm×50mm×L;

[0040] (2) Hot rolling: heating, hot rolling, coiling, cooling; the process flow is: feeding in front of the furnace → billet heating → rough rolling at 460 rolling mill → head and tail cutting → intermediate rolling at 350 rolling mill → pre-finishing rolling at 280 rolling mill (rolling room) Water cooling) → cutting head and tail → 250 mill finishing rolling (water cooling between rolling mills) → 210 wire rod mill → spinning coils → water cooling;

[0041] Among them, the hot rolling is heated by pushing the steel pusher into the heating furnace. The heating temperature is 1250 ℃, the rolling start temperature (1120 ℃, rolled into Φ6.5mm wire rod and then spinning into a circl...

Embodiment 3

[0047] The cold drawing process step of the lead-containing free-cutting steel provided by the present invention is as follows:

[0048] (1) Forging: According to the forging regulations of intermediate frequency furnace steel ingots, the remelted ingots are forged into steel ingots of 50mm×50mm×L;

[0049] (2) Hot rolling: heating, hot rolling, coiling, cooling; the process flow is: feeding in front of the furnace → billet heating → rough rolling at 460 rolling mill → head and tail cutting → intermediate rolling at 350 rolling mill → pre-finishing rolling at 280 rolling mill (rolling room) Water cooling) → cutting head and tail → 250 mill finishing rolling (water cooling between rolling mills) → 210 wire rod mill → spinning coils → water cooling;

[0050] Among them, the hot rolling is heated by pushing the steel pusher into the heating furnace. The heating temperature is 1240°C, the rolling start temperature is (1080°C), rolled into Φ6.5mm wire rods, and then spinning into c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a cold-drawing machining process for lead-containing free-cutting steel. The cold-drawing machining process comprises the following steps: (1) forging; (2) hot rolling; (3) annealing; (4) straightening, cold-rolling sizing and scalping; (5) cold drawing and bright annealing. By adopting the machining process for steel wire rods provided by the invention, finished wire rods having superior surface quality such as freeness from internal cracks, shrinkage holes, looseness and the like and having uniform performance can be obtained, the production and machining requirements are met, and even the quality of the finished wire rods reaches or exceeds the quality of imported wire rods of the same type.

Description

technical field [0001] The invention relates to a processing technology of steel, in particular to a processing technology of lead-containing free-cutting steel. Background technique [0002] Free-cutting steel (referred to as free-cutting steel) is a kind of steel with good cutting performance by adding an appropriate amount of chemical elements (called easy-cutting elements) that can improve machinability. According to the classification of free-cutting elements, the current types of free-cutting steel mainly include sulfur free-cutting steel, lead free-cutting steel, calcium free-cutting steel, titanium free-cutting steel and composite free-cutting steel. [0003] Among them, the content of lead in lead free-cutting steel is generally ≤0.35% in free-cutting steel, and there are lead added alone or combined lead. Lead in steel generally exists as spherical particles of 1-2 μm alone, or attached to inclusions such as sulfide, so its size and uniformity of dispersion become...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23P13/00
CPCB23P13/00
Inventor 李飞
Owner WUXI CHENGBO SCI & TECH DEV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com