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Manufacturing method for low magnetic anchor chain accessory

A manufacturing method and anchor chain technology, which is applied to ships and other directions, can solve problems such as large expansion coefficient, easy cracks, and low thermal conductivity of austenitic steel, so as to reduce deformation, reduce workpiece temperature difference, and reduce heating speed. Effect

Pending Publication Date: 2021-03-30
JIANGSU ASIAN STAR ANCHOR CHAIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, austenitic steel has low thermal conductivity and large expansion coefficient, and is prone to cracks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method of manufacturing a low magnetic anchor chain attachment, characterized in that the steps of:

[0021] Step 1, prepare, calculate the length of the discharge length according to the drawings, and the bladed material is used;

[0022] Step 2, the billet is subjected to the back of the step, the direction of the billet ratio should be rolled along the material; the temperature above the heat temperature of 850 ° C is not more than 400 ° C / h, and the temperature is 1100 ~ 1250 ° C, final forging The temperature is not less than 900 ° C; forging forging forging per fire ratio 2;

[0023] Step three, perform ultrasonic flaw detection of the initial forged billet obtained by step two;

[0024] Step four, the initial forging of the step three is heated, and the temperature above the temperature above 850 ° C is not more than 400 ° C / h at the time of forging heating, and the final forging temperature is not less than 900 ° C, the total forging ratio is 3;

[0025] Step ...

Embodiment 2

[0033] A method of manufacturing a low magnetic anchor chain attachment, characterized in that the steps of:

[0034] Step 1, prepare, calculate the length of the discharge length according to the drawings, and the bladed material is used;

[0035] Step 2, the billet is subjected to the back of the step, the direction of the billet ratio should be rolled along the material; the temperature above the heat temperature of 850 ° C is not more than 400 ° C / h, and the temperature is 1100 ~ 1250 ° C, final forging The temperature is not less than 900 ° C; forging forging forging forging ratio 2.5;

[0036] Step three, perform ultrasonic flaw detection of the initial forged billet obtained by step two;

[0037] Step four, the first forging of step three is heated, and the temperature above 850 ° C below 850 ° C is not more than 400 ° C / h at the time of heating. The final forging temperature is not less than 900 ° C, and the total forging is not less than 3.5. ;

[0038] Step 5. For th...

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PUM

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Abstract

The invention discloses a manufacturing method for a low magnetic anchor chain accessory. The method comprises the following steps of I, feeding by way of sawing; II, a cogging and swaging direction shall be along a material rolling direction, wherein the forging ratio per fire does not exceed 2.5 during casting; III, ultrasonic flaw detection; IV, initially forged blank heating: forging and heating, wherein the initial forging temperature is 1100-1250 DEG C, the final forging temperature is not lower than 900 DEG C, and the total forging ratio is not less than 3; V, furnace cooling or sand burying cooling for the finally forged blank; VI, solution treatment for the finally forged blank; VII, flaw detection; VIII, machining of the finally forged blank, wherein the amount of feed per time does not exceed 0.5 mm; VIII, inspection and warehousing; and X, ageing treatment. By reducing the heating speed and shortening the temperature difference of a workpiece, cracking is prevented. By reducing the single time deformation and reducing the deformation resistance, the forming quality is improved. During machining, by reducing the amount of feed, tool adhesion is avoided, so that the surface quality of the low magnetic anchor chain accessory is improved.

Description

Technical field [0001] The present invention relates to the field of ships and marine engineering, and more particularly to a method of manufacturing a low magnetic anchor chain attachment. Background technique [0002] Conventional anchoring materials are carbon steel or low alloy steel, with high strength, good toughness, but often severe corrosion during seawater, affecting the service life, so the anchor chain of other materials is required under certain conditions. Austenitic steel has low magnetic or non-magnetic properties, corrosion resistance and low temperature toughness, and has a good application value. However, the austenite steel is low, and the expansion is large, and crack is easy. Therefore, it is necessary to provide a method of manufacturing a low magnetic anchor chain attachment that causes defects or cracking during the forging process. Inventive content [0003] The present invention is to solve the above technical problems, and provide a method of manufact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B63B21/20
CPCB23P15/00B63B21/20B63B2021/203
Inventor 董鑫陶安祥陶良凤张卫新李剑邵云亮张明范鹏
Owner JIANGSU ASIAN STAR ANCHOR CHAIN
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