Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of marine diesel engine fuselage casting material and preparation method thereof

A marine diesel engine and airframe technology, applied in the field of mechanical casting, can solve problems such as unreasonable proportioning, structural defects of castings, and reduced mechanical properties

Active Publication Date: 2017-01-25
CSIC NO 12 RES INST
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a casting material for a marine diesel engine body, which solves the problem of structural defects and lower mechanical properties of the castings caused by the unreasonable ratio of one or more elements in the existing casting material for a marine diesel engine body The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] M-type diesel engine fuselage casting materials, melting charge: according to the required design components, the chemical composition ratio before the furnace is carried out, the charge is weighed, the weighed charge and alloy are added to the furnace, power is sent, melted and the composition is homogenized; The order of feeding is to add the furnace charge first, then add the alloy after melting to obtain the initial molten iron. Among them, the required design components are: composed of the following components in terms of mass percentage: Fe 91%, C 4.0%, Si 2.6%, Cu 2 %, Mn 0.3%, P 0.07%, S 0.03%, the sum of the content of the above components is 100%; the furnace charge includes pig iron, scrap steel and ductile iron fuselage riser, waste ductile iron fuselage, ductile iron material Waste castings, low grade gray cast iron waste castings. Adjust the smelting composition: analyze the chemical composition of the initial molten iron, determine the composition differ...

Embodiment 2

[0041] Materials for P-type diesel engine fuselage castings, melting charge: according to the required design components, the chemical composition ratio before the furnace is carried out, the charge is weighed, and the weighed charge and alloy are added to the furnace, and the power is sent to melt and homogenize the composition; The order of feeding is to add the furnace charge first, then add the alloy after melting to obtain the initial molten iron. Among them, the required design components are: composed of the following components in terms of mass percentage: Fe 94%, C 3.4%, Si 1.4%, Cu 1.07 %, Mn 0.1%, P 0.02%, S 0.01%, the total content of the above components is 100%; the charge includes pig iron, scrap steel and nodular cast iron fuselage riser, waste nodular cast iron fuselage, ductile iron material Waste castings, low grade gray cast iron waste castings. Adjust the smelting composition: analyze the chemical composition of the initial molten iron, determine the compo...

Embodiment 3

[0043] Materials for N-type diesel engine fuselage castings, melting charge: according to the required design components, the chemical composition ratio before the furnace is carried out, the charge is weighed, the weighed charge and alloy are added to the furnace, power is sent, melted and the composition is homogenized; The charging sequence is to add the charge first, and then add the alloy after melting to obtain the initial molten iron. Among them, the required design components are: composed of the following components by mass percentage: Fe 93%, C 3.74%, Si 2%, Cu 1 %, Mn 0.2%, P 0.04%, S 0.02%, the sum of the content of the above components is 100%; the furnace charge includes pig iron, scrap steel and ductile iron fuselage riser, waste ductile iron fuselage, ductile iron material Waste castings, low grade gray cast iron waste castings. Adjust the smelting composition: analyze the chemical composition of the initial molten iron, determine the composition difference acc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Marine diesel engine body casting material comprises, by weight percentage, 91-94% of Fe, 3.4-4.0% of C, 1.4-2.6% of Si, 1-2% of Cu, 0.1-0.3% of Mn, 0.02-0.07% of P and 0.01-0.03% of S, wherein the content sum of the components is 100%. A production method of the marine diesel engine body casting material includes: melting furnace burden, adjusting smelting components, analyzing the chemical components of initial molten iron, and performing spheroidisation and anti-spheroidization to obtain the marine diesel engine body casting material. The marine diesel engine body casting material and the production method have the advantages that the problems that texture defects and mechanical performance lowering occur due to unreasonable proportion of one or more elements in existing marine diesel engine body casting material are solved, cast yield is increased, operation simpleness is achieved, and the production method is stable and reliable.

Description

technical field [0001] The invention belongs to the technical field of mechanical casting, and relates to a casting material for a marine diesel engine body, and also relates to a preparation method of the casting material for a marine diesel engine body. Background technique [0002] Diesel engine fuselage is one of the most critical components of marine medium-speed diesel engines. Its characteristics are: the casting has compact structure, large dimensions, lubricating oil passages and cooling water passages are cast inside, and the geometry of the inner cavity and outer wall is relatively complex, and the wall thickness The thickness is uneven, the maximum wall thickness and the minimum wall thickness are very different, the processing accuracy is high, and there are many flaw detection parts. Due to the heavy weight and complex structure of the fuselage castings, it is very difficult to cast the fuselage. [0003] Ductile iron diesel engine fuselage has the advantages ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C33/08
Inventor 黄引平王剑李高峰张威
Owner CSIC NO 12 RES INST