Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of automobile fastener wire

A fastener wire and wire technology, applied in the direction of metal material coating process, etc., can solve the problems of low toughness, prone to cracking, low strength, etc.

Inactive Publication Date: 2020-07-07
DONGGUAN KELEE STEEL WIRE
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many problems in the automotive fasteners produced in my country, such as low strength, low toughness and easy cracking during cold heading, which cannot meet the production needs of high-end automotive fasteners in high strength and high toughness.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] On the one hand, an embodiment of the present invention provides a method for preparing an automotive fastener wire, comprising the following steps:

[0016] S01. Provide low-carbon alloy steel wire rod, the carbon content of the low-carbon alloy steel wire rod is 0.19wt%-0.21wt%, the boron content is 0.0005wt%-0.0030wt%, the sulfur content is ≤0.025wt%, and the phosphorus content is ≤0.025 wt%;

[0017] S02. Pickling and phosphating the low-carbon alloy steel wire rod in sequence, and then performing a first drawing treatment to obtain a first drawn product;

[0018] S03. Perform spheroidizing annealing treatment on the first drawn product to obtain a spheroidized annealed product; the spheroidizing annealing treatment includes: raising the temperature of the first drawn product to 710-730° C. under a protective atmosphere, Keep warm for 5-8 hours; then cool to 540-560°C at a rate of 15-25°C / hour, then continue to cool to 390-410°C at a rate of 75-85°C / hour, and then ...

Embodiment 1

[0054] This embodiment provides a method for preparing an automotive fastener wire, comprising the following steps:

[0055] S11. Provide low-carbon alloy steel wire rod, the composition of the low-carbon alloy steel wire rod refers to Table 1:

[0056] Table 1

[0057] Content (wt%) carbon 0.20 boron 0.0010 silicon ≤0.10 manganese 0.89 sulfur ≤0.025 phosphorus ≤0.025

[0058] Through metallographic microscopic examination, the grain size of the low-carbon alloy steel wire rod is 9-10 grades, the non-metallic inclusions are ≤1 grade, no Widmanstatten structure is contained, and the ellipticity of the low-carbon alloy steel wire rod is ≤0.20mm.

[0059] S12. Pickling and phosphating the low-carbon alloy steel wire rod in sequence, and then performing a first drawing treatment to obtain a first drawn product;

[0060] When pickling, use a hydrochloric acid aqueous solution with a mass concentration of 15%, and pickle for 20 mi...

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

PropertyMeasurementUnit
Ellipticityaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of automobile manufacturing, and particularly relates to a preparation method of an automobile fastener wire. The preparation method provided by the invention comprises the steps of providing a low-carbon alloy steel wire, wherein the carbon content of the low-carbon alloy steel wire is 0.19 wt% to 0.21 wt%, and the boron content of the low-carbon alloysteel wire is 0.0005 wt% to 0.0030 wt%; sequentially carrying out acid pickling and phosphorization on the low-carbon alloy steel wire, and then carrying out first drawing treatment to obtain a firstdrawing product; carrying out spheroidizing annealing treatment on the first drawing product, and obtaining a spheroidizing annealing product, wherein the spheroidizing annealing treatment comprisesthe steps of heating the first drawing product to 710-730 DEG C in a protective atmosphere, and keeping the temperature for 5-8 hours; cooling to 540-560 DEG C at a speed of 20 DEG C / h, continuously cooling to 390-410 DEG C at a speed of 80 DEG C / h, and naturally cooling to normal temperature, wherein the protective atmosphere is methanol pyrolysis gas when the temperature is 550 DEG C or above, and the protective atmosphere is nitrogen when the temperature in the furnace is lower than 550 DEG C; and sequentially carrying out acid pickling and phosphorization on the spheroidizing annealing product, and carrying out second drawing treatment, wherein sodium nitrite is adopted as an accelerant for phosphorization.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a method for preparing automobile fastener wires. Background technique [0002] Fasteners are widely used in automobiles, engineering, construction and other fields. From the perspective of the development of the entire manufacturing industry, fasteners are called "industrial rice" and "screws" of the national economy. For example, in the automotive product structure, although fasteners only account for a small part of the entire structure, they are one of the indispensable organic components of the automotive product structure and play a more important role. Common fasteners include bolts, screws, studs, nuts, and their assemblies such as washers, retaining rings, pins, rivets, connection pairs, etc. There are many types of automotive fasteners, which are mainly divided into four categories, including standard fasteners, non-standard fasteners, stan...

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): B21C37/04C22C38/02C22C38/04C21D8/06C23C22/13
CPCB21C37/04C22C38/02C22C38/04C22C38/32C21D8/065C23C22/13
Inventor 肖杰徐福生罗安武
Owner DONGGUAN KELEE STEEL WIRE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com