Titanium alloy piston and connecting rod set applied to diesel locomotive and process method

A technology of piston connecting rod and process method, which is applied in the field of rail transit, can solve the problems of low elastic modulus and yield strength of aluminum parts, affect life, and poor anti-corrosion performance, and achieve long service life, uniform force, high intensity effect

Active Publication Date: 2015-11-25
沈阳泰恒通用技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0024] Steel parts have problems such as being too heavy, poor anti-corrosion performance, and fracture affecting service life
[0025] Aluminum parts suffer from low elastic modulus and yield strength

Method used

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  • Titanium alloy piston and connecting rod set applied to diesel locomotive and process method
  • Titanium alloy piston and connecting rod set applied to diesel locomotive and process method
  • Titanium alloy piston and connecting rod set applied to diesel locomotive and process method

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] A titanium alloy used to manufacture a piston connecting rod group. In order to prevent friction and wear between dissimilar metals, the parts of the piston connecting rod group use the same titanium alloy raw material. The performance indicators of the titanium alloy material are shown in Table 4:

[0047]

[0048] Table 4

[0049] Titanium alloy by mass percentage is:

[0050] The Al content is 5.5-6.5%, the Mo content is 0.5-1.5%, the V content is 3.5-4.5%, the Fe content is less than 0.25%, the O content is less than 0.15%, and the balance is Ti.

[0051] Titanium alloy by mass percentage is:

[0052] The Al content is 5.8-6.2%, the Mo content is 0.8-1.2%, the V content is 3.8-4.2%, the Fe content is less than 0.25%, the O content is less than 0.15%, and the balance is Ti.

[0053] Titanium alloy by mass percentage is:

[005...

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Abstract

The invention discloses titanium alloy. The titanium alloy comprises, by mass, 5.5-6.5% of Al, 0.5-1.5% of Mo, 3.5-4.5% of V, less than 0.25% of Fe, less than 0.15% of O and the balance Ti. A process method for manufacturing a piston and connecting rod set through the titanium alloy includes the first step of smelting and ingot casting, the second step of forging, the third step of heat treatment, the fourth step of machining, the fifth step of ultrasonic flaw detection and the sixth step of finished product forming. Finish machining and rough machining are sequentially adopted for a titanium alloy piston top; surface grinding is adopted for a titanium alloy piston ring and a titanium alloy piston pin; turning is adopted for a titanium alloy connecting rod; and for a titanium alloy connecting rod bolt, a turning rod is adopted, a bolt blank is formed in an upsetting manner, and then finish machining is performed. According to the titanium alloy, the weight of a diesel engine piston system of a diesel locomotive is reduced by 35-50%, the strength is higher than that of a steel piston pin, the service life is longer than that of a steel piston pin, and the corrosion resistance is much better than that of a steel piston pin.

Description

technical field [0001] The invention belongs to the technical field of rail transportation. At present, titanium alloy is applied in the field of rail transportation. It relates to weight reduction, anti-fatigue and anti-corrosion of diesel engine piston connecting rod groups, and particularly relates to new structures, new materials, and materials of titanium alloy piston connecting rod groups. New Technology. Background technique [0002] Titanium alloy has high strength, low density, low elastic modulus, excellent fatigue resistance and corrosion resistance. Titanium will not break, will not rust, and will not corrode in any atmospheric environment. Titanium is so resistant to corrosion that it doesn't even require any paint treatment. Titanium alloy materials with so many advantages have not been applied in rail transit equipment. [0003] The density of titanium alloy is 4.5g / cm 3 , which is 57% of the density of steel, and its strength is equivalent to that of stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18B23P15/00
Inventor 单宇航周杰王永伟高岭昕
Owner 沈阳泰恒通用技术有限公司
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