Vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate and preparation method thereof

A technology of vermicular graphite cast iron and vermicular rate, which is applied in the field of high vermicular rate vermicular graphite cast iron single-cylinder diesel engine body and its preparation field, can solve the problems of difficulty in obtaining vermicular graphite iron stably, difficulty in casting production, etc., and achieves the crystallization range Narrow, good fluidity and excellent casting properties

Active Publication Date: 2015-04-01
SHANDONG YUANTONG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty in the casting production of compacted graphite cast iron, although some foundry manufacturers produce compacted graphite cast iron, it is difficult to stably obtain compacted graphite cast iron with high creeping rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A single-cylinder diesel engine body: configured as the following components by mass percentage: 3.7% carbon, 2.3% silicon, 0.65% manganese, P<0.08%, S<0.03%, and the balance is iron and unavoidable impurities.

[0028] The preparation method is as follows: use Z14 cast iron, nodular cast iron, vermicular graphite cast iron return charge, ferrosilicon and ferromanganese as raw materials, mix all the raw materials, and melt them in an intermediate frequency induction furnace at a temperature of 1525 ° C; Put the agent and part of the slag-accumulating agent in the bottom of the vermicomposting treatment bag; after the composition of the smelting liquid passes the test, add the remaining slag-accumulating agent to the smelting liquid melted in the intermediate frequency induction furnace to remove the slag, and use the embankment-type bag-bottom flushing method Enter the vermicularization treatment package for vermicularization treatment, add the remaining inoculant to ino...

Embodiment 2

[0033] A single-cylinder diesel engine body: the following components are configured by mass percentage: carbon 3.5%, silicon 2.1%, manganese 0.5%, P<0.08%, S<0.03%, and the balance is iron and unavoidable impurities.

[0034] The preparation method is as follows: use Z14 cast iron, nodular cast iron, vermicular graphite cast iron return material, ferrosilicon and ferromanganese as raw materials, mix all the raw materials, and melt them in an intermediate frequency induction furnace at a temperature of 1510 ° C; Put the agent and part of the slag-accumulating agent in the bottom of the vermicomposting treatment bag; after the composition of the smelting liquid passes the test, add the remaining slag-accumulating agent to the smelting liquid melted in the intermediate frequency induction furnace to remove the slag, and use the embankment-type bag-bottom flushing method Enter the vermicularization treatment bag for vermicularization treatment, and add the remaining inoculant to i...

Embodiment 3

[0039] A single-cylinder diesel engine body: the following components are configured by mass percentage: 3.8% carbon, 2.6% silicon, 0.8% manganese, P<0.08%, S<0.03%, and the balance is iron and unavoidable impurities.

[0040] The preparation method is as follows: use Z14 cast iron, nodular cast iron, vermicular graphite cast iron return charge, ferrosilicon and ferromanganese as raw materials, mix all the raw materials, and melt them in an intermediate frequency induction furnace at a temperature of 1540 ° C; Put the agent and part of the slag-accumulating agent in the bottom of the vermicomposting treatment bag; after the composition of the smelting liquid passes the test, add the remaining slag-accumulating agent to the smelting liquid melted in the intermediate frequency induction furnace to remove the slag, and use the embankment-type bag-bottom flushing method Enter the vermicularization treatment bag for vermicularization treatment, add the remaining inoculant to inocula...

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PUM

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Abstract

The invention relates to a single cylinder diesel engine body and particularly relates to a vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate. The single cylinder diesel engine body comprises the following chemical components in percentage by mass: 3.5-3.8% of C, 2.1-2.6% of Si, 0.5-0.8% of Mn, less than 0.08% of P, less than 0.03% of S and the balance of iron and inevitable impurities. The single cylinder diesel engine body provided by the invention has the characteristics of less inclination of shrinkage cavity and shrinkage porosity and long service life. The invention further provides a preparation method of the single cylinder diesel engine body, which is reasonable in process.

Description

technical field [0001] The invention relates to a single-cylinder diesel engine body, in particular to a high vermicular graphite cast iron single-cylinder diesel engine body and a preparation method thereof. Background technique [0002] In the prior art, high-strength gray cast iron is mostly used for casting single-cylinder diesel engine bodies, such as gray cast iron HT200, gray cast iron HT250, gray cast iron HT300, etc. In actual use, the single-cylinder diesel engine body made of gray iron often has thermal fatigue cracks, which is determined by the characteristics of gray cast iron. Since the elongation of gray iron is almost zero, the thermal shock resistance is poor. The tensile strength of vermicular graphite cast iron is higher than that of general high-strength gray cast iron, it has a certain elongation, and its fatigue resistance is better than that of general high-strength gray cast iron. However, due to the difficulty in the casting production of compacted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04C22C33/08
Inventor 赵桂菊唐浩然周仕勇李兴华
Owner SHANDONG YUANTONG MASCH CO LTD
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