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High pressure common rail forged piece of engine

A high-pressure common rail and engine technology, applied in the field of high-pressure common rail forgings for engines, can solve the problems of difficult to achieve ideal comprehensive mechanical properties, multiple production equipment and human resources, energy waste, etc., to shorten the production cycle and reduce production costs , the effect of reducing energy consumption

Active Publication Date: 2014-11-12
SHANDONG JINMA INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two production processes not only require secondary heating, resulting in waste of energy, occupying too much production equipment and human resources, but also in some cases, the comprehensive mechanical performance requirements are difficult to achieve the ideal state

Method used

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  • High pressure common rail forged piece of engine
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  • High pressure common rail forged piece of engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The engine high-pressure common rail forging described in this embodiment includes a rail body with an axial passage, and a plurality of radial pipes forged together with the rail body; the material of the forging is low alloy steel, specifically the The content of C in the above-mentioned low alloy steel is 0.30wt%, the content of Si is 0.35wt%, the content of Mn is 0.72wt%, the content of Cr is 0.44wt%, the content of Mo is 0.15wt%, the content of V is 0.16 wt%, the content of Ti is 0.015wt%, the content of Al is 0.015wt%, the content of Ni is 0.12wt%, the content of P is 0.012wt%, the content of S is 0.010wt%, the balance is Fe and unavoidable of impurities. The smelting method of the low-alloy steel is prepared by the method of electric furnace + refining outside the furnace + vacuum degassing. The heat treatment of the high-pressure common rail forgings is realized by the forgings being processed in the rapid cooling zone, the stable zone and the slow cooling zone...

Embodiment 2

[0029] The engine high-pressure common rail forging described in this embodiment includes a rail body with an axial passage, and a plurality of radial pipes forged together with the rail body; the material of the forging is low alloy steel, specifically the The content of C in the low alloy steel is 0.35wt%, the content of Si is 0.25wt%, the content of Mn is 0.85wt%, the content of Cr is 0.48wt%, the content of Mo is 0.18wt%, and the content of V is 0.18wt%. wt%, the content of Ti is 0.015wt%, the content of Al is 0.015wt%, the content of Ni is 0.12wt%, the content of P is 0.012wt%, the content of S is 0.010wt%, the balance is Fe and unavoidable of impurities. The smelting method of the low-alloy steel is prepared by the method of electric furnace + refining outside the furnace + vacuum degassing. The heat treatment of the high-pressure common rail forgings is realized by the forgings being processed in the rapid cooling zone, the stable zone and the slow cooling zone. When ...

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Abstract

The invention relates to a high pressure common rail forged piece of an engine. The high pressure common rail forged piece comprises a rail body of an axial channel and a plurality of radial tubes which are integrally forged and formed with the rail body; the forged piece is made of low alloy steel of which the carbon content is 0.36-0.43wt%; the tensile strength Rm is 980-1100MPa; the yield strength Re is greater than or equal to 650MPa; the percentage elongation after fracture A is greater than or equal to 14%; the percentage reduction of area Z is greater than or equal to 55%. By adopting a forging and cooling process for the high pressure common rail forged piece of the engine, both a rescannable metallographic structure state is ensured, and a prepared product is good in mechanical comprehensive property and particularly is excellent in both tensile strength and machining plasticity; moreover, as the hot forging machining process and the metallurgical process for thermal treatment in the preparation process are organically combined, secondary heating of a thermal treatment process is avoided, the process stability is high, not only is the energy consumption remarkably reduced, but also the production and manufacturing period is greatly shortened, and the production cost is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of engine processing, and more specifically, the invention relates to a high-pressure common rail forging for an automobile engine. Background technique [0002] The high-pressure common rail system has greatly improved the driving performance and emission performance of automobile engines. With the advancement of exhaust after-treatment technology and air-fuel ratio control technology, it is no longer at the expense of high thermal efficiency of the engine. It is very important for energy saving and environmental protection. has great significance. Among the high-strength materials used for high-pressure common rail, alloy steel materials such as Cr, Mo, V and other precious metals are added as needed, and in order to ensure pressure resistance, high-pressure common rail usually needs to be normalized or annealed after hot forging Wait for heat treatment. [0003] In the conventional technology, the fuel ...

Claims

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Application Information

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IPC IPC(8): C22C38/50C21D8/00
Inventor 曾庆峰马祖斌赵昌德李玉田刘贤存郑世念龙金义孟祥海乔世逊
Owner SHANDONG JINMA INDAL GROUP
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