Copper alloy protection nut and manufacturing method thereof

A technology for protecting nuts and manufacturing methods, which is applied in the field of alloys, can solve problems such as poor metal fatigue and affect production efficiency, and achieve the effects of increasing strength, reducing area shrinkage and derivative rate, and improving tensile strength

Active Publication Date: 2016-01-13
ZHEJIANG PENGCHENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the nuts manufactured by domestic manufacturers mainly use common alloy materials such as 40Cr, 30CrNiMoA, 40CrNiMoA, and 42CrMo. The materials are heat-treated during production to ensure that they will not crack or break during the normal rolling process, but the metal fatigue is relatively high. Poor, after 3-5 months of use, cracking occurs one after another. After being subjected to cold steel, blackhead steel is not easy to break to protect rolling facilities such as rollers, resulting in accidents such as burning shafts, burning oil film bearings, and broken shafts. , leading to the high-speed rolling stoppage, seriously affecting the production efficiency, it can only be applied to the rolling mill below 65m / s, and only suitable for the rolling area with a minimum of 2mm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The invention provides a copper alloy protective nut, which comprises: 55% Cu, 6% Al, 4% Mn, 1% Co, 0.6% Pb, 0.005% B in weight percent, The balance is Zn.

[0026] The manufacturing method of the above-mentioned copper alloy protective nut comprises the following steps:

[0027] (1), take by weight percentage: 55% Cu, 6% Al, 4% Mn, 1% Co, 0.6% Pb, 0.005% B, the balance is Zn, at 735 Under the condition of ℃, carry out annealing and normalizing treatment for 1.5h~3h;

[0028] (2), take out the alloy material in the step (1) and put it into the blank for extrusion molding;

[0029] (3) Carry out the milling process on the molded product of step (2) to make a finished product.

[0030] The step (1) also includes: 0.04% Ti, 0.06% Zr by weight percentage.

[0031] The hardness of the alloy treated in the step (1) is 220HRB±10, and the tensile strength reaches 740Mpa±2%.

[0032] By adopting the above-mentioned proportion and method, the reduction of area of ​​the produ...

Embodiment 2

[0034] A copper alloy protective nut, comprising: 60% Cu, 4.2% Al, 6% Mn, 0.8% Co, 0.6% Pb, 0.005% B, 0.04% Ti by weight percentage , 0.06% Zr, and the balance is Zn.

[0035] The manufacturing method of the above-mentioned copper alloy protection nut comprises the following steps:

[0036] (1), by weight percentage: 55% Cu, 6% Al, 4% Mn, 1% Co, 0.6% Pb, 0.005% B, 0.04% Ti, 0.06% Zr, the balance is Zn, annealing and normalizing treatment for 1.5h to 3h at 735°C;

[0037] (2), take out the alloy material in the step (1) and put it into the blank for extrusion molding;

[0038] (3) Carry out the milling process on the molded product of step (2) to make a finished product.

[0039] The hardness of the alloy treated in the step (1) is 220HRB±10, and the tensile strength reaches 740Mpa±2%.

[0040] Such a ratio not only has the advantages of Example 1, but on the one hand, it enhances the anti-recession ability of the alloy, thereby reducing the reduction of area and derivation...

Embodiment 3

[0042] A copper alloy protective nut, comprising: 55% Cu, 6% Al, 4% Mn, 1% Co, 0.6% Pb, 0.005% B, 0.04% Ti by weight percentage , 0.06% Zr, and the balance is Zn.

[0043] The manufacturing method of the above-mentioned copper alloy protective nut comprises the following steps:

[0044] (1), by weight percentage: 55% Cu, 6% Al, 4% Mn, 1% Co, 0.6% Pb, 0.005% B, 0.04% Ti, 0.06% Zr, the balance is Zn, annealing and normalizing treatment for 1.5h to 3h at 735°C;

[0045] (2), take out the alloy material in the step (1) and put it into the blank for extrusion molding;

[0046] (3) Carry out the milling process on the molded product of step (2) to make a finished product.

[0047] The hardness of the alloy treated in the step (1) is 220HRB±10, and the tensile strength reaches 740Mpa±2%.

[0048] The above ratio and method also have the advantages of stable operation at ordinary times, and when a critical value is encountered, it will break immediately to protect the machine and ...

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PUM

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Abstract

The invention discloses a copper alloy protection nut. The copper alloy protection nut comprises the following components in percentage by weight: 55-60% of Cu, 4-6% of Al, 2.5-4% of Mn, 0.6-1% of Co, 0.6% of Pb, 0.005% of B, and the balance of Zn. The invention further discloses a manufacturing method of the copper alloy protection nut. The copper alloy protection nut has such advantages as high bearing pressure, capability of automatically breaking to protect a roller box, prevention of burning an oil film bearing, high safety and convenience for use.

Description

technical field [0001] The invention relates to alloy technology, in particular to a copper alloy protective nut and a manufacturing method thereof. Background technique [0002] With the advancement of my country's steel rolling technology and the improvement of equipment levels, the wire and bar production lines have gradually moved towards continuous, automated, and efficient production, and their requirements for the stability of high-rolling wires are also getting higher and higher. The current 65M / S has been unable to meet the more efficient rolling efficiency. Especially for the production line mainly based on hot-rolled ribbed steel bars, the finished frame has higher requirements for the higher rolling resistance of the roll box. At present, the use of the roll box in the finishing mill basically relies on imported manufacturers, domestic roll boxes The box and its accessories often fail to meet the rolling torque transmission conditions due to problems such as allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22F1/08B23P15/00
Inventor 何耀耀王勇伟
Owner ZHEJIANG PENGCHENG TECH
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