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Cold-heading finished silk treatment process

A technology of processing technology and finished silk, which is applied in heat treatment furnace, heat treatment equipment, metal material coating process, etc.

Inactive Publication Date: 2014-01-29
浙江瑞利紧固件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the quality of the cold heading finished wire itself is the primary key. Only high-quality cold heading finished wire (such as fine metallographic structure and smooth surface) can produce cold heading products with high difficulty and complex structure, and the quality of the product can be guaranteed. Otherwise, Cracks are prone to occur during the cold heading process of the product, and products with complex structures cannot be formed, and the service life of the mold will also be greatly affected

Method used

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Experimental program
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Embodiment Construction

[0008] The process steps of the high-precision cold heading finished silk processing process of the present invention are: ①Put the finished silk in the spheroidizing annealing furnace for spheroidizing annealing, process step a, add nitrogen gas in the furnace, the ratio of the amount of nitrogen added to the volume of the furnace chamber More than 5:1, the purpose of adding nitrogen is to dilute the air in the furnace and remove oxygen, b, for medium carbon and high carbon cold heading finished silk materials, after the furnace temperature is heated to 550oC-600oC, methanol cracking products [CO] and [ H], the amount of methanol added to the methanol cracking furnace is controlled above 30ml / min, and the methanol cracking products [CO] and [H] have high reducibility, forming a good protective atmosphere in the entire furnace, which can remove the residual oxygen and Oxide on the surface of the material to prevent decarburization of the material, c, the temperature of the furn...

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PUM

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Abstract

The invention discloses a cold-heading finished silk treatment process. The process comprises the following steps: (1) putting the finished silk into a nodulizing annealing furnace for nodulizing annealing; (2) checking the finished silk subjected to the nodulizing annealing, and performing aging treatment on the qualified finished silk; (3) putting the finished silk subjected to aging treatment into a treatment pool and performing surface treatment: (a) performing three passes of acid washing in an acid washing pool; (b) performing water washing in a water washing pool; (c) performing oxalic acid washing in an oxalic acid pool; (d) phosphorizing in a phosphorizing pool; and (e) saponifying in a saponifying pool; and (4) drying. By adopting the process disclosed by the invention, the treated cold-heading finished silk has the advantages of high nodulizing rate and low decarbonization rate and easiness in lubrication and use; for a cold-heading product which is very difficult to produce and has a complicated structure, the quality of the product is good, the cracking in the product cold-heading process can be prevented, and the service life of a die is remarkably prolonged.

Description

technical field [0001] The invention relates to a process for processing cold heading finished silk. Background technique [0002] The cold heading finished wire can be directly used to make various rod parts on the cold heading equipment. The parts have high precision and strong interchangeability, especially high production efficiency and low cost, which can greatly reduce the labor intensity of workers. It is widely used in production and production of automobile and motorcycle parts. Among them, the quality of the cold heading finished wire itself is the primary key. Only high-quality cold heading finished wire (such as fine metallographic structure and smooth surface) can produce cold heading products with high difficulty and complex structure, and the quality of the product can be guaranteed. Otherwise, Cracks are prone to occur during the cold heading process of the product, and products with complex structures cannot be formed. In addition, the service life of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C21D9/52C21D1/74C21D1/32C23C22/07C23C22/78C23C22/83
Inventor 陈利荣徐小红
Owner 浙江瑞利紧固件有限公司
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