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a jack top hat

A jack and top hat technology, applied in the field of jacks, can solve problems such as the hardness and tensile strength of the top hat cannot meet the needs, and achieve the effects of improving service life, saving costs, and reducing waste

Active Publication Date: 2016-04-27
ANHUI TONGRUN AUTO ACCESSORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of society, the hardness and tensile strength of the top hat in the prior art can no longer meet the needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A jack top hat, the components and their weight percentages are: C: 1.28%, Mn: 12.8%, Si: 0.82%, Cr: 2.75%, Mo: 0.48%, S: 0.01%, P: 0.008%, Re : 0.07%; the balance is Fe.

[0027] The preparation method of jack top cap comprises the following steps:

[0028] (1) Use intermediate frequency furnace for smelting, temperature: 1568°C; raw materials: 20% scrap steel, 70% pig iron, 10% recycled materials, sampling and analysis after smelting, each component must meet the requirements;

[0029] (2) Inoculation treatment: carry out twice, add the Re of total amount 18% for the first time, incubate with the iron liquid flow when tapping for the second time;

[0030] (3) Pouring: the temperature is 1410°C, and the pouring time is 7 minutes;

[0031] (4) After cooling to room temperature, unpack, polish and trim;

[0032] (5) Quenching treatment: when the temperature is 325°C, keep warm for 1.8 hours; when the temperature is 530°C, keep warm for 2.2 hours; when the temperature ...

Embodiment 2

[0040] A jack top hat, the components and their weight percentages are: C: 1.2%, Mn: 13.0%, Si: 0.7%, Cr: 2.8%, Mo: 0.4%, S: 0.01%, P: 0.01%, Re : 0.1%; the balance is Fe.

[0041] The preparation method of jack top cap comprises the following steps:

[0042] (1) Use an intermediate frequency furnace for smelting, temperature: 1560°C; raw materials: 20% scrap steel, 70% pig iron, and 10% recycled materials. Sampling and analysis are carried out after smelting, and each component must meet the requirements;

[0043] (2) Inoculation treatment: carry out twice, add 20% Re of total amount for the first time, incubate with the iron liquid flow for the second time when tapping;

[0044] (3) Pouring: the temperature is 1400°C, and the pouring time is 6 minutes;

[0045] (4) After cooling to room temperature, unpack, polish and trim;

[0046] (5) Quenching treatment: when the temperature is 320°C, keep warm for 2 hours; when the temperature is 52°C, keep warm for 2.4 hours; when th...

Embodiment 3

[0049] A jack top hat, the components and their weight percentages are: C: 1.4%, Mn: 12.5%, Si: 0.9%, Cr: 2.6%, Mo: 0.6%, S: 0.008%, P: 0.007%, Re : 0.05%; the balance is Fe.

[0050] The preparation method of jack top cap comprises the following steps:

[0051] (1) Use an intermediate frequency furnace for smelting, temperature: 1580°C; raw materials: 20% scrap steel, 70% pig iron, and 10% recycled materials. Sampling and analysis are carried out after smelting, and each component must meet the requirements;

[0052] (2) Inoculation treatment: carry out in two times, add 15% Re of total amount for the first time, incubate with the iron liquid flow for the second time when tapping;

[0053] (3) Pouring: the temperature is 1420°C, and the pouring time is 5 minutes;

[0054] (4) After cooling to room temperature, unpack, polish and trim;

[0055] (5) Quenching treatment: when the temperature is 340°C, keep warm for 1.6 hours; when the temperature is 540°C, keep warm for 2 hou...

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Abstract

The invention discloses a lifting jack top cap which comprises the following components in percentage by weight: 1.2-1.4% of C, 12.5-13.0% of Mn, 0.7-0.9% of Si, 2.6-2.8% of Cr, 0.4-0.6% of Mo, at most 0.01% of S, at most 0.01% of P, 0.05-0.1% of Re and the balance of Fe. The components of the top cap are changed to enhance the hardness and tensile strength to 200-240 HRB and 240-280 MPa, thereby satisfying the demands for production and living; and the service life of the lifting jack is prolonged, thereby saving the cost and reducing the waste.

Description

technical field [0001] The invention relates to the technical field of jacks, in particular to a jack top cap. Background technique [0002] Jack is a kind of light and small lifting equipment that uses a rigid top lifting part as a working device, and lifts a weight in a stroke by a top bracket or a bottom claw. The jack is mainly used in factories, mines, transportation and other departments for vehicle repair and other lifting and support. Its structure is light and strong, flexible and reliable, and can be carried and operated by one person. [0003] Jack is divided into mechanical jack and hydraulic jack two kinds, and principle has nothing in common with each other. In principle, the hydraulic jack is based on the principle of Pascal's principle, that is, the pressure of the liquid is the same everywhere, so that in a balanced system, the pressure exerted on the smaller piston is relatively small, while the pressure on the larger piston is relatively small. The appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/38
Inventor 韦秋林
Owner ANHUI TONGRUN AUTO ACCESSORY