Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nodular cast iron for vehicle speed reducer and preparation process of nodular cast iron

A preparation process and technology for reducers, which are applied in mechanical equipment, belts/chains/gears, transmission parts, etc., can solve the problems of short service life of reducers, small internal structure grains, and large equipment tonnage, etc., and increase the surface area. The effect of hardness, low preparation cost and long service life

Inactive Publication Date: 2016-09-21
HANSHAN COUNTY XINGDA DUCTILE IRON FACTORY
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the internal structure of the reducer is required to be fine and fine, the mechanical properties are good, the forming size and geometric shape of the forging are closer to the precision of the finished forging, but the blanking volume of the blank must be accurate, the forging force is large, the tonnage of the equipment is large, and the crystal of the internal structure small grain
The materials used for automobile reducers in the prior art cannot meet these requirements, and the service life of the reducer is short

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nodular cast iron for vehicle speed reducer and preparation process of nodular cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation process of nodular cast iron for automobile reducer, comprising the following steps:

[0020] (1) Put pig iron and scrap steel into the electric furnace, raise the temperature to 1420-1430°C for smelting, raise the temperature to 1460-1470°C, add ferromanganese, ferromagnesium, rare earth elements and ferrosilicon for alloying treatment, and then adjust the content of each component Ratio, slag removal to remove surface scum;

[0021] (2) Carry out spheroidizing treatment to the molten iron in step (1) by the capping method, add 1.2% spheroidizing agent of the original molten iron quality, add inoculant at the same time, carry out inoculation treatment for the first time, and let stand for 3-5min; After spheroidizing, carry out the second inoculation treatment, add 0.2-0.3% inoculant, and adjust the composition of molten iron to carbon 3.2%, silicon 1.8%, manganese 0.6%, rare earth elements 0.08%, magnesium 0.23%, phosphorus≦0.06% , sulfur≦0.02%, then sla...

Embodiment 2

[0025] A preparation process of nodular cast iron for automobile reducer, comprising the following steps:

[0026] (1) Put pig iron and scrap steel into the electric furnace, raise the temperature to 1420-1430°C for smelting, raise the temperature to 1460-1470°C, add ferromanganese, ferromagnesium, rare earth elements and ferrosilicon for alloying treatment, and then adjust the content of each component Ratio, slag removal to remove surface scum;

[0027] (2) Carry out spheroidization treatment to the molten iron in step (1) by using the cover bag method, add 1.6% nodulizer of the original molten iron quality, add inoculant at the same time, carry out inoculation treatment for the first time, let stand for 3-5min ;After spheroidization, carry out the second inoculation treatment, add 0.2-0.3% inoculant, adjust the composition of molten iron to carbon 3.5%, silicon 1.6%, manganese 1.2%, rare earth elements 0.25%, magnesium 0.21%, phosphorus≦0.06 %, sulfur ≦ 0.02%, then remove ...

Embodiment 3

[0031] A preparation process of nodular cast iron for automobile reducer, comprising the following steps:

[0032] (1) Put pig iron and scrap steel into the electric furnace, raise the temperature to 1430-1440°C for smelting, raise the temperature to 1470-1480°C, add ferromanganese, ferromagnesium, rare earth elements and ferrosilicon for alloying treatment, and then adjust the content of each component The ratio is carbon 3.5-3.8%, silicon 1.8-2.5%, manganese 0.8-1.0%, rare earth elements 0.08-0.16%, magnesium 0.12-0.21%, phosphorus≦0.06%, sulfur≦0.02%, the balance is iron, slag removal remove surface scum;

[0033] (2) Carry out spheroidization treatment to the molten iron in step (1) by using the cover bag method, add 1.5% nodulizer of the original molten iron quality, add inoculant at the same time, carry out inoculation treatment for the first time, let stand for 3-5min ; After spheroidization, carry out the second inoculation treatment, add 0.2-0.3% inoculant, adjust th...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses nodular cast iron for a vehicle speed reducer and a preparation process of the nodular cast iron. The material of the nodularcast iron for the vehicle speed reducer comprises the following chemical components in percentage by mass: 3.2-3.8% of carbon, 1.6-2.8% of silicon, 0.6-1.2% of manganese, 0.01-0.25% of rare earth elements, 0.08-0.23% of magnesium, not more than 0.06% of phosphorus, not more than 0.02% of sulfur, and the balance of iron. The nodular cast iron is uniform and compact in distribution of internal structure and surface structure of the material, excellent in mechanical property of the material, good in rotating bending fatigue strength, high insurface hardness, strength, toughness, tensile strength and wear resistance, low in preparation cost, high in utilization rate of the material, good in technical process reproducibility, simple in preparation process and long in service life, and satisfies the use requirements of the vehicle speed reducer on the material.

Description

technical field [0001] The invention relates to the technical field of cast iron smelting technology, in particular to a nodular cast iron for automobile reducer and a preparation process thereof. Background technique [0002] Since the beginning of the 20th century, automobiles have become an indispensable means of transportation in people's daily life and work. In the "Twelfth Five-Year Plan", the automobile industry technology has also become a key support field of the Ministry of Science and Technology. Possess a practical independent innovation capability, a breakthrough in the internationalization of trusted parts and components, and realize real industrial upgrading. Therefore, how to achieve this goal through scientific and technological innovation has become the core issue that must be solved in the current and future development of the automotive industry. [0003] The car reducer is the main part of the car transmission system to reduce the speed and increase the...

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 Applications(China)
IPC IPC(8): C22C37/04C22C37/10C22C33/10C21C1/10F16H57/032
CPCC22C37/04C21C1/105C21D2211/002C21D2211/008C22C33/10C22C37/10F16H57/032
Inventor 张福新
Owner HANSHAN COUNTY XINGDA DUCTILE IRON FACTORY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com