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Engine high pressure common rail forgings

A high-pressure common rail and engine technology, which is applied in the field of high-pressure common rail forgings of engines, can solve the problems that the comprehensive mechanical performance requirements are difficult to achieve, excessive 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: 2016-10-05
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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  • Engine high pressure common rail forgings
  • Engine high pressure common rail forgings
  • Engine high pressure common rail forgings

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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 forging for an engine, comprising 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 carbon with a carbon content of 0.36-0.43wt For low alloy steel, the tensile strength Rm is 980~1100 MPa, the yield strength Re≥650 MPa, the elongation after fracture A≥14%, and the reduction of area Z≥55%. The engine high-pressure common rail forging of the present invention not only ensures a reasonable metallographic structure state through forging and cooling processes, but also has good mechanical comprehensive properties, especially excellent tensile strength and good processing plasticity; Moreover, in the preparation process, the hot forging process is organically combined with the metallurgical process of heat treatment, which avoids the secondary heating of the heat treatment process, and has high process stability, which not only significantly reduces energy consumption, but also greatly shortens the production cycle. Significantly reduce production costs.

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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Patent Type & Authority Patents(China)
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