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Production technology for wear-resisting high-chromium cast iron material

A high-chromium cast iron, production process technology, applied in the production process field of wear-resistant high-chromium cast iron materials, can solve the problems of fracture failure, insufficient toughness, etc., and achieve the effects of good mechanical properties, good wear resistance, and high microhardness

Active Publication Date: 2017-06-27
JINHUA STAR MACHINERY & STEEL CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problem of premature fracture and failure due to insufficient toughness in the prior art, and provides a production process of wear-resistant high-chromium cast iron material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A production process of a wear-resistant high-chromium cast iron material, comprising the following steps: S1, raw material smelting; S2, pouring; S3, heat treatment,

[0022] Step S1, raw material smelting, specifically includes the following steps:

[0023] Step (1), weigh 23Cr, 3.1C, 1.3Mn, 0.9Cu, 0.48Mo, ​​0.6Si, 0.4Ni by mass percentage, and the rest is Fe.

[0024] In this example, the alloying elements Ni and Cu are insoluble in carbides, and the segregation ratio of the elements is zero. They dissolve in the metal matrix to play their role in increasing hardenability. The combination of alloying elements such as , Ni, and Cu can improve the hardenability of high-chromium cast iron materials. Experimental research shows that when the Mn content in cast iron is 1.4% and does not contain Mo, it can only harden a round bar with a diameter of 20mm. , when the Mo element content is 0.3%, it can harden a round bar with a diameter of 50mm, and when the Mo element conte...

Embodiment 2

[0036] Same as Example 1, the difference is that 25Cr, 3.2C, 1.5Mn, 1.1Cu, 0.58Mo, 0.8Si, 0.6Ni are weighed in mass percentage when the raw material is smelted, and the rest is Fe.

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PUM

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Abstract

The invention relates to a production technology for a wear-resisting material and discloses a production technology for a wear-resisting high-chromium cast iron material. The production technology includes the following steps that firstly, raw materials are smelted, wherein the raw materials including, by mass percent, 23%-25% of Cr, 3.1%-3.2% of C, 1.3%-1.5% of Mn, 0.9%-1.1% of Cu, 0.48%-0.58% of Mo, 0.6%-0.8% of Si and 0.4%-0.6% of Ni are weighed firstly, and then certain power is controlled in an induction cooker for smelting; secondly, casting is conducted under the casting temperature ranging from 1380 DEG C to 1400 DEG C; and thirdly, heat treatment is conducted and includes annealing, quenching and tempering. According to the production technology for the wear-resisting high-chromium cast iron material, the high-chromium cast iron material manufactured through the production technology has good mechanical performance, relatively high microhardness, good wear-resisting performance, relatively good wear resisting performance and relatively large impact toughness value.

Description

technical field [0001] The invention relates to a production process of a wear-resistant material, in particular to a production process of a wear-resistant high-chromium cast iron material. Background technique [0002] High chromium cast iron is a kind of important wear-resistant material that is widely used. Its hardness is usually as high as HRC63. It has high hardness and good microstructure. Its excellent wear resistance has attracted more and more attention and can be widely used. Wear-resistant parts for phosphorus chemical industry, non-ferrous smelting, cement, thermal power generation, and mining. [0003] However, due to the limited ability of the martensite + retained austenite matrix to absorb impact and stress, the ideal state can only reach 20J / cm 2 , so that the toughness of high-chromium cast iron is low, which easily leads to premature fracture and failure, which limits the use of high-chromium cast iron in the case of large impact and high stress. If the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/08C22C37/10C22C33/08C21D1/18C21D5/00
CPCC21D1/18C21D5/00C22C33/08C22C37/08C22C37/10
Inventor 王建新张良平
Owner JINHUA STAR MACHINERY & STEEL CASTING CO LTD