Casting technology of vermicular graphite cast iron full-hydraulic redirector body shell cast

A technology of vermicular graphite cast iron and casting process, which is applied in the field of casting technology of vermicular graphite cast iron full hydraulic steering gear casing castings, can solve the problems of wear resistance and pressure difference, poor casting processability, low life and other problems, so as to improve the wear resistance. and fatigue resistance, the effect of solving the large difference in creep rate, and improving stability

Inactive Publication Date: 2019-01-15
ANHUI DATIAN CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a casting process of vermicular graphite cast iron full hydraulic steering gear shell castings, which ensures that the creep rate of different parts of the same casting differs by 5-10%, and satisfies the requirements of the full hydraulic steering gear shell castings on creep To meet the requirements of uniformity of efficiency, solve the defects of oil leakage, bursting, heavy weight, wear resistance and pressure difference, low service life and poor casting process of the full hydraulic steering gear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A casting process of vermicular graphite cast iron full hydraulic steering gear body shell casting, comprising the following steps:

[0026] (1) Make and shape the blank mold of the full hydraulic steering gear body, and control the shrinkage rate of 0.75% during the mold making. The pouring system adopts middle injection, and water enters from the thickest part of the casting. The semi-closed casting system is adopted. Runner section ratio A straight: A horizontal: A inside = 2:3:1, the above-mentioned green mold sand mold is used to make a mold with a high-pressure molding machine, and a resin sand core is used;

[0027] (2) Use vermicular graphite cast iron to cast the blank of the full hydraulic steering gear body, put Q10 pig iron, scrap steel and vermicular iron into the melting furnace, heat up to 1520-1550°C for smelting, remove impurities after smelting for 50-60min, and then pass Spectral analysis detects the content of each chemical component, and according t...

Embodiment 2

[0032] A casting process of vermicular graphite cast iron full hydraulic steering gear body shell casting, comprising the following steps:

[0033] (1) Make and shape the blank mold of the full hydraulic steering gear body, and control the shrinkage rate of 0.75% during the mold making. The pouring system adopts middle injection, and water enters from the thickest part of the casting. The semi-closed casting system is adopted. Runner section ratio A straight: A horizontal: A inside = 2:3:1, the above-mentioned green mold sand mold is used to make a mold with a high-pressure molding machine, and a resin sand core is used;

[0034] (2) Use vermicular graphite cast iron to cast the blank of the full hydraulic steering gear body, put Q10 pig iron, scrap steel and vermicular iron into the melting furnace, heat up to 1520-1550°C for smelting, remove impurities after smelting for 50-60min, and then pass Spectral analysis detects the content of each chemical component, and according t...

Embodiment 3

[0039] A casting process of vermicular graphite cast iron full hydraulic steering gear body shell casting, comprising the following steps:

[0040] (1) Make and shape the blank mold of the full hydraulic steering gear body, and control the shrinkage rate of 0.75% during the mold making. The pouring system adopts middle injection, and water enters from the thickest part of the casting. The semi-closed casting system is adopted. Runner section ratio A straight: A horizontal: A inside = 2:3:1, the above-mentioned green mold sand mold is used to make a mold with a high-pressure molding machine, and a resin sand core is used;

[0041] (2) Use vermicular graphite cast iron to cast the blank of the full hydraulic steering gear body, put Q10 pig iron, scrap steel and vermicular iron into the melting furnace, heat up to 1520-1550°C for smelting, remove impurities after smelting for 50-60min, and then pass Spectral analysis detects the content of each chemical component, and according t...

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Abstract

The invention provides a casting technology of a vermicular graphite cast iron full-hydraulic redirector body shell cast and relates to the technical field of cast production. The method includes: manufacturing a mold, smelting components and removing impurities, supplying components, performing vermicularizing inoculation, performing pouring shaping, performing cooling shaping, and cleaning off the sand. The method guarantees that the vermicularizing rates of different parts on the same cast are differed by 5-10%, which satisfies the requirement on vermicularizing rate uniformity of the full-hydraulic redirector body shell cast. The technology can solve the defects of oil leakage, explosion, heavy weight, poor wearing resistance and pressure resistance, short service life, poor manufacturability of the cast and the like of a full-hydraulic redirector body shell.

Description

technical field [0001] The invention relates to the technical field of casting production, in particular to a casting process of vermicular graphite cast iron full hydraulic steering gear casing castings. Background technique [0002] As a full hydraulic steering gear for the steering system of construction machinery, it is a steering safety component. The working environment is harsh, and it is subjected to irregular alternating impact stress. The quality of its castings requires Class I. At present, all hydraulic steering gear shells are made of gray cast iron. The actual use shows that the production of full hydraulic steering gear shells with high-grade gray cast iron has poor casting performance, uneven structure, low compactness and low pressure resistance, and thick and large. The cross-section oil port is prone to oil leakage, and even the safety accident of the shell bursting; at the same time, in order to ensure that the full hydraulic steering gear shell withstand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/22C21C1/08C22C33/08C22C37/10C22C37/06
CPCB22C9/02B22C9/22C21C1/08C22C33/08C22C37/06C22C37/10Y02P10/20
Inventor 张祥吴元立徐祥俊
Owner ANHUI DATIAN CASTING
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