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

Niobium bainite ductile iron material and production process thereof

A production process, bainite technology, applied in the field of niobium-containing bainite ductile iron and its production process, can solve the problems of high production cost, achieve low production cost, simple and easy production process, and facilitate nucleation and long-term big effect

Active Publication Date: 2012-11-07
SHANGHAI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process adds a large amount of alloying elements, and the production cost is high

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
  • Niobium bainite ductile iron material and production process thereof
  • Niobium bainite ductile iron material and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Chemical composition (wt%) of niobium-containing bainite ductile iron material: C3.6, Si2.5, Mn2.0, Mo0.3, Cu0.5, Nb0.25, and the balance is Fe. It is smelted in an intermediate frequency induction furnace, and the chemical composition is tested before it is released from the furnace. After all the furnace materials are melted, an appropriate amount of molten iron is poured into a spectral sample of φ45×4mm at 1400 ° C, and analyzed by a spectrometer to adjust the chemical composition of the molten iron. The furnace temperature is 1500°C, and the pouring temperature is 1400°C.

[0020] Spheroidization by punching method, the spheroidizer is FeSiMg 8 RE 7 , the dosage is 1.8wt%, break the spheroidizing agent into small pieces, put it into the bottom of the treatment bag, then cover the spheroidizing agent with inoculant and perlite slag collecting agent, pour 1 / 2~2 / 3 of the molten iron, When the boiling of the molten iron is over, pour in the rest of the molten iron, a...

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

The invention relates to a niobium bainite ductile iron material and a production process thereof, belonging to the technical field of metal materials. The niobium bainite ductile iron material comprises the following components in percent by weight: 3.5-3.8 percent of C, 2.4-2.8 percent of Si, 1.5-2.2 percent of Mn, 0.2-0.5 percent of Mo, 0.5-0.8 percent of Cu and 0.2-0.6 percent of Nb. The niobium bainite ductile iron material has a texture characteristic of bainite, martensite, austenite, carbide and globular graphite and mechanical characteristics of HRC of 47-49 and Ak of 13-15J / cm<2>. The production process comprises the steps of: 1, casting process, melting after preparing for materials according to a formula, wherein the tapping temperature is 1450-1500 DEG C, the pouring temperature is 1400+ / -20 DEG C, nodulizing is carried out by adopting a sandwich process, a nodulizing agent is FeSiMg8RE7 with the consumption of 1.8wt percent, inoculation is carried out by adopting 75SiFe with the consumption of 1.0wt percent; and 2, a heat treatment process, austenitizing at a temperature of 900 DEG C, preserving the temperature for 3h, air-cooling to 300 DEG C for intermediate temperature transition, and preserving the temperature for 2h. The niobium bainite ductile iron material is used in an abrasive-resistance casting, and has low production cost and simple and easy productionprocess; and the mechanical property and the abrasive resistance of the niobium bainite ductile iron material are enhanced after niobium is alloyed.

Description

technical field [0001] The invention relates to a niobium-containing bainite ductile iron and a production process thereof, belonging to the technical field of metal materials. Background technique [0002] Bainite ductile iron is an excellent wear-resistant material, which has high hardness, impact toughness and impact fatigue resistance in terms of performance, and its comprehensive performance is high. The excellent comprehensive mechanical properties of bainitic ductile iron make it widely used, such as in the occasions of wear resistance, impact resistance, high strength, high toughness and fatigue resistance. It has broad application prospects in wear-resistant parts such as lining boards, grinding segments, hammer heads, baseballs, and blow bars. [0003] There are three production methods for bainitic ductile iron. One is the austempering process. In this process, the ball iron is first austenitized, then quickly quenched into a salt bath at a certain temperature ...

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): C22C37/04C22C33/10C21D5/00
Inventor 翟启杰孙小亮闫永生华勤
Owner SHANGHAI UNIV