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Alloy material for automobile brake pump piston and preparation method of alloy material

An alloy material and automobile braking technology, applied in the field of iron-based alloys, can solve problems such as easy magnetization, driving safety threats, and reduced sealing performance, and achieve the effects of not easily deformed, excellent antimagnetic properties, and high hardness

Inactive Publication Date: 2016-05-04
HANGZHOU POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the working process, the piston of the automobile brake pump is subject to great pressure and impact force, which is easy to be worn and damaged, and the piston of the automobile brake pump is damaged due to long-term contact with oil. It is easy to be corroded, and the sealing performance will be reduced, correspondingly reducing the service life of the brake pump piston; the brake pump piston is also prone to magnetization during long-term use, which poses a threat to driving safety

Method used

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  • Alloy material for automobile brake pump piston and preparation method of alloy material
  • Alloy material for automobile brake pump piston and preparation method of alloy material
  • Alloy material for automobile brake pump piston and preparation method of alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An alloy material used for automobile brake pump pistons, wherein the percentage of raw material components is:

[0041] C: 0.08%, Mn: 1.50%, P: 0.03%, S: 0.03%, Si: 1.50%, Cr: 18.0%, Ni: 10.0%, Ti: 0.70%, Ta: 0.5%, Nb: 0.20%, Cu: 1.0%, Ge: 0.7%, Sc: 0.30%, Eu: 0.40%, and the rest is Fe.

[0042] Prepared by:

[0043] (1) Add Fe, Mn, Cr, Ni, Ti, Ta, Nb, Cu, Sc, Eu elemental substances to be smelted into the vacuum chamber of the water-cooled copper crucible, vacuumize, and melt at a sintering temperature of 875°C;

[0044] (2) Add C, P, S, Ge, Si simple substances under the condition of metal melting, keep warm for 42min, and stir evenly;

[0045] (3) Cool the molten metal to room temperature at a cooling rate of 70° C. / min to obtain a rod.

[0046] (4) Fill the smelted metal blank with N at normal pressure 2 Under the conditions of tempering and holding for 42min, cool to room temperature at a cooling rate of 70°C / min to obtain rods.

Embodiment 2

[0048] An alloy material used for automobile brake pump pistons, wherein the percentage of raw material components is:

[0049] C: 0.04%, Mn: 0.80%, P: 0.03%, S: 0.03%, Si: 1.0%, Cr: 17.0%, Ni: 8.0%, Ti: 0.45%, Ta: 0.20%, Nb: 0.20%, Cu: 0.70%, Ge: 0.70%, Sc: 0.20%, Eu: 0.20%, and the rest is Fe.

[0050] Prepared by:

[0051] (1) Add the Fe, Mn, Cr, Ni, Ti, Ta, Nb, Cu, Sc, Eu elemental substances to be smelted into the vacuum chamber of the water-cooled copper crucible, vacuumize, and melt at a sintering temperature of 870°C;

[0052] (2) Add C, P, S, Ge, Si simple substances under the condition of metal melting, keep warm for 20min, and stir evenly;

[0053] (3) Cool the molten metal to room temperature at a cooling rate of 50° C. / min to obtain a rod.

[0054] (4) Fill the smelted metal blank with N at normal pressure 2 Under the conditions of tempering and holding for 20 minutes, cool to room temperature at a cooling rate of 50°C / min to obtain rods.

Embodiment 3

[0056] An alloy material used for automobile brake pump pistons, wherein the percentage of raw material components is:

[0057] C: 0.10%, Mn: 2.0%, P: 0.04%, S: 0.04%, Si: 2.0%, Cr: 20.0%, Ni: 11.0%, Ti: 0.70%, Ta: 0.50%, Nb: 0.50%, Cu: 1.20%, Ge: 1.20%, Sc: 0.50%, and the rest is Fe.

[0058] Prepared by:

[0059] (1) Fe, Mn, Cr, Ni, Ti, Ta, Nb, Cu, Sc to be smelted are added to the vacuum chamber of the water-cooled copper crucible, vacuumed, and melted at a sintering temperature of 850°C;

[0060] (2) Add C, P, S, Ge, and Si simple substances under the condition of metal melting, keep warm for 50min, and stir evenly;

[0061] (3) Cool the molten metal to room temperature at a cooling rate of 80° C. / min to obtain a rod.

[0062] (4) Fill the smelted metal blank with N at normal pressure 2 Under the conditions of tempering and heat preservation for 50min, the rod was obtained by cooling to room temperature at a cooling rate of 80°C / min.

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Abstract

The invention provides an alloy material for an automobile brake pump piston. The alloy material comprises 0.04%-0.10% of C, 0.8%-2.0% of Mn, 0.03%-0.04% of P, 0.03%-0.04% of S, 1.0%-2.0% of Si, 17.0%-20.0% of Cr, 8.0%-11.0% of Ni, 0.45%-0.70% of Ti, 0.7%-1.2% of Cu, 0.2%-0.5% of Ta, 0.20%-0.50% of Nb and the balance of Fe; the metal raw materials are sintered under the conditions of vacuum and 850-880 DEG C; subsequently, tempering is carried out at 600 DEG C, followed by cooling, and in such a manner, the alloy material having excellent properties of magnetic resistance, corrosion resistance, pressure resistance and not easy deformation is obtained.

Description

technical field [0001] The invention belongs to the field of iron-based alloys, and in particular relates to an alloy material used for a piston of an automobile brake pump and a preparation method thereof. Background technique [0002] As a symbol of modern civilization, automobiles have promoted the development of human civilization. With the continuous and rapid development of the national economy, my country's automobile industry has made great progress, and the number of motor vehicles has increased rapidly. Automobiles have become the most important means of transportation in contemporary Chinese society. Automobile braking is one of the main performances of automobile active safety. Mandatory and regular detection of vehicle braking has become an important measure for vehicle safety management of vehicle authorities in all countries in the world. [0003] Automobile brake pump pistons are used in the hydraulic braking system of automobiles and are often referred to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/04C22C38/34C22C38/02C22C38/50C22C38/48C22C38/42C22C33/04C21D1/26
CPCC22C38/58C21D1/26C22C33/04C22C38/002C22C38/005C22C38/02C22C38/04C22C38/34C22C38/42C22C38/48C22C38/50
Inventor 罗晓晔
Owner HANGZHOU POLYTECHNIC
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