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Preparation method of baby carriage fastener wire rod

A fastener wire and wire technology, applied in the field of baby carriage fastener wire preparation, can solve the problems of low impact toughness, high brittleness, low molding rate, etc.

Active Publication Date: 2020-07-07
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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  • Preparation method of baby carriage fastener wire rod

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Experimental program
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Effect test

preparation example Construction

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

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

[0017] S02: Carry out pickling and phosphating of the carbon steel wire in sequence, and then perform a first drawing treatment to obtain a first drawn product;

[0018] S03. Perform spheroidizing annealing treatment on the first drawn product to obtain a spheroidizing annealing product; the spheroidizing annealing treatment includes: heating the first drawn product to an austenite transformation temperature in a protective atmosphere Keep the temperature at 20~30℃ for 5~7 hours; then cool to 540~560℃ at a rate of 15~25℃ / hour, then continue to cool to 390~410℃ at a rate of 75~85℃ / hour, then cool naturally ...

Embodiment 1

[0057] This embodiment provides a method for preparing a fastener wire for a stroller, which includes the following steps:

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

[0059] Table 1

[0060] Content (wt%) carbon0.18 silicon≤0.10 manganese0.75 sulfur≤0.020 phosphorus≤0.020 aluminum 0.045

[0061] Through metallographic microscopic examination, the carbon steel wire rod is grade 9-10, non-metallic inclusions ≤ grade 1, does not contain Widmanstatten structure, and the ovality of the low carbon alloy steel wire rod is ≤ 0.10 mm.

[0062] S12, sequentially pickling and phosphating the carbon steel wire rod, and then performing a first drawing treatment to obtain a first drawn product;

[0063] During pickling, a hydrochloric acid aqueous solution with a mass concentration of 15% is used for pickling for 20 minutes.

[0064] The first drawing process adopts a wire drawing machine, the total compression rate is ≥50%,...

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Abstract

The invention belongs to the technical field of baby carriage preparation, and particularly relates to a preparation method of a baby carriage fastener wire rod. The preparation method comprises the following steps of providing a carbon steel wire rod with the carbon content of 0.17-0.19 wt%, the phosphorus content of less than or equal to 0.020 wt%, the sulfur content of less than or equal to 0.020 wt%, and the aluminum content of 0.030 wt% to 0.060 wt%; sequentially carrying out acid pickling and phosphorization on the carbon steel wire rod, and then carrying out first drawing treatment to obtain a first drawing product; performing spheroidizing annealing treatment on the first drawing product to obtain a spheroidizing annealing product, wherein the spheroidizing annealing treatment comprises the steps of heating the first drawing product to 710-730 DEG C in a protective atmosphere, and keeping the temperature for 5-7 hours; cooling to 540-560 DEG C at a speed of 15-25 DEG C / h, and continuously cooling to 390-410 DEG C at a speed of 75-85 DEG C / h, and then naturally cooling to room 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 is lower than 550 DEG C; and sequentially carrying out acid pickling and phosphorization on the spheroidizing annealingproduct, and performing the second drawing treatment, wherein the total compression ratio of the first drawing treatment is greater than or equal to 50%, and the partial compression ratio is less than or equal to 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 a baby carriage fastener wire. Background technique [0002] Baby strollers are divided into the manufacturing industry, and the Chinese government classifies them into the toy industry. The development trajectory of children's bicycles and toys in my country is exactly the same: at the beginning of reform and opening up, it started from undertaking the transfer of Taiwan-funded and Hong Kong-funded enterprises, and started to be OEM. In the past ten years, with the rapid development of the domestic market, the children's bicycle industry has entered a period of great development. This trend This is especially evident 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 a...

Claims

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Application Information

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Patent Type & Authority Applications(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