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A kind of preparation method of baby carriage fastener wire

A fastener wire and wire technology, applied in the field of preparation of baby carriage fastener wire, can solve the problems of low impact toughness, low forming rate, high brittleness, etc., and achieve high forming rate, improved spheroidization rate and stable performance Effect

Active Publication Date: 2021-10-08
DONGGUAN KELEE STEEL WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the raw materials for making baby carriage screws in China are generally brittle and have low impact toughness. They are prone to cracking during cold heading forming and the forming rate is low.

Method used

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  • A kind of preparation method of baby carriage fastener wire

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preparation example Construction

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

[0016] S01. Provide carbon steel wire rod, the carbon content of the carbon steel wire rod is 0.17wt%-0.19wt%, the phosphorus content is ≤0.020wt%, the sulfur content is ≤0.020wt%, and the aluminum content is 0.030wt%-0.060wt%. ;

[0017] S02. Pickling and phosphating the carbon 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: heating the first drawn product to the austenite transformation temperature under a protective atmosphere Above 20-30°C, keep warm for 5-7 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 co...

Embodiment 1

[0057] This embodiment provides a method for preparing a baby carriage fastener wire, comprising the following steps:

[0058] S11. Provide carbon steel wire rod, the composition of the carbon steel wire rod refers to Table 1:

[0059] Table 1

[0060] Content (wt%) carbon 0.18 silicon ≤0.10 manganese 0.75 sulfur ≤0.020 phosphorus ≤0.020 aluminum 0.045

[0061] Through metallographic microscopic inspection, the carbon steel wire rod is grade 9-10, non-metallic inclusions ≤ grade 1, no Widmanstatten structure, and the ellipticity of the low-carbon alloy steel wire rod ≤ 0.10mm.

[0062] S12. Pickling and phosphating the carbon steel wire in sequence, and then performing a first drawing treatment to obtain a first drawn product;

[0063] When pickling, use a hydrochloric acid aqueous solution with a mass concentration of 15%, and pickle for 20 minutes.

[0064] The first drawing process adopts a wire drawing machine, the tota...

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Abstract

The invention belongs to the technical field of baby carriage preparation, and in particular relates to a preparation method of a wire rod for a fastener of a baby carriage, comprising: providing a carbon steel wire rod, the carbon content of the carbon steel wire rod is 0.17wt% to 0.19wt%, and the phosphorus content is ≤0.020wt%. , the sulfur content is ≤0.020wt%, and the aluminum content is 0.030wt%-0.060wt%. The carbon steel wire rod is pickled and phosphated in sequence, and then the first drawing treatment is performed to obtain the first drawing product; the first The drawn product is subjected to spheroidizing annealing treatment to obtain a spheroidizing annealing product; the spheroidizing annealing treatment includes: under a protective atmosphere, raising the temperature of the first drawn product to 710-730°C and keeping it warm for 5-7 hours; Cool at a rate of ℃ / hour to 540-560℃, then continue to cool at a rate of 75-85℃ / hour to 390-410℃, and then cool naturally to room temperature; when the temperature is above 550℃, the protective atmosphere is methanol cracking gas, When the temperature is less than 550°C, the protective atmosphere is nitrogen; the spheroidized annealed product is pickled and phosphated in sequence, and then the second drawing treatment is performed; the total compression rate of the first drawing treatment is ≥50%, and the partial compression rate is ≤15 %.

Description

technical field [0001] The invention belongs to the technical field of baby carriage preparation, and in particular relates to a preparation method of wire rods for fasteners of baby carriages. Background technique [0002] Children's carriages are classified from the manufacturing industry, and the Chinese government classifies them in the toy industry. The development trajectory of my country's baby carriages and toys is exactly the same: at the beginning of the reform and opening up, it began to undertake the transfer of Taiwan-funded and Hong Kong-funded enterprises, and started as an OEM. With the rapid development of the domestic market in the past ten years, the baby carriage industry has entered a period of great development. This trend Especially after 2008. According to the latest national census statistics, there are more than 70 million infants and young children aged 0-3 in China, accounting for 1 / 5 of the total population. From 2008 to 2016, the global annual ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C21D1/32C21D1/74C21D9/52B21C37/04C23C22/73
CPCB21C37/04C21D1/32C21D1/74C21D9/52C22C38/06C23C22/73
Inventor 王斯华刘晓祥陈文学
Owner DONGGUAN KELEE STEEL WIRE