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Heat treatment technology for R6 level mooring cable

A mooring chain and process technology, which is applied in the field of marine mooring chains to achieve good economic and social benefits and the effect of improving mechanical properties

Active Publication Date: 2016-08-24
JIANGSU ASIAN STAR ANCHOR CHAIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this kind of product, the traditional heat treatment furnace obviously cannot meet the requirements, and the mining round link chain usually uses induction heating and quenching, but its specification often does not exceed 40mm in diameter, while the minimum specification of mooring chain is 50mm, and the common specification is around 90mm , so it does not apply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1. A heat treatment process for R6 grade mooring chains, comprising the following steps:

[0025] A) After the mooring chain chain enters the quenching furnace tube, the chain link is preheated by the rising furnace gas through the preheating zone to make the temperature reach 300-500°C;

[0026] B) The chain of the mooring chain enters the rapid heating zone, raising the temperature to above 700°C;

[0027] C) Control the temperature of the mooring chain chain at 1045°C in the quenching temperature heating zone. After entering the heat preservation zone, control the temperature at 1015°C and keep it warm for 190 minutes, and then carry out water cooling. The running speed of the chain during quenching is 0.19m / min , enter the heat preservation area for uniform temperature, which is equivalent to the heat preservation of ordinary chamber furnaces or trolley furnaces;

[0028] D) After the mooring chain chain enters the tempering furnace barrel, it is heated ...

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Abstract

A heat treatment technology for an R6 level mooring cable comprises the following steps that firstly, a mooring cable chain enters a quenching furnace barrel to be preheated; secondly, the mooring cable chain enters a rapid heating area; thirdly, the temperature of the mooring cable chain in a quenching temperature heating area is controlled to be at 1,045 DEG C, after the mooring cable chain enters an insulating area, the temperature is controlled at 1,015 DEG C and kept for 190 min, then water cooling is conducted, and the running speed of the chain during quenching is 0.19 m / min; fourthly, the mooring cable chain enters a tempering furnace barrel and then is preheated; and fifthly, the mooring cable chain enters a heating area; sixthly, the temperature of the mooring cable chain in a tempering temperature heating area is controlled at 690 DEG C, after the mooring cable chain enters the insulating area, the temperature is controlled at 640 DEG C and kept for 190 min, and then water cooling is conducted again. According to the heat treatment technology, expected material inner structure transformation of the chain can be achieved; and good economic and social benefits are achieved for application and popularization.

Description

technical field [0001] The invention relates to a marine mooring chain, in particular to a heat treatment process for an R6 mooring chain. Background technique [0002] With the development of ocean development and offshore industry, the market puts forward higher requirements for mooring chains. R6 grade mooring chain is a newly developed mooring chain with high strength and toughness, its tensile strength is ≥1110MPa, and V-notch impact is ≥58J. Since the R6 mooring chain has great heat treatment sensitivity, if the heat treatment process is slightly different during process design or execution, it will have a great impact on the performance of the R6 mooring chain. It can be seen that the heat treatment process is one of the key technologies in the manufacturing process of R6 mooring chains. Therefore, it is necessary to control the strength of the weld seam and the base metal of the R6 mooring chain link through a reasonable heat treatment process, so that it meets the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/00
CPCC21D1/18C21D9/00C21D9/0087
Inventor 邵云亮张明陶安祥陶兴张卫新李剑
Owner JIANGSU ASIAN STAR ANCHOR CHAIN
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