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

Chromium nickel nitrogen rare-earth wear-resistant and heat-resistant steel

A heat-resistant steel, chromium-nickel-nitrogen technology, applied in the field of chromium-nickel-nitrogen rare earth wear-resistant heat-resistant steel, can solve the problems of low carbon content, affecting the application of steel types, high cost, etc., and achieve good oxidation resistance, material melting and casting. Good performance of welding process

Inactive Publication Date: 2014-11-05
安徽中建材开源新材料科技有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using these heat-resistant steels to manufacture wear-resistant and heat-resistant parts of cement thermal equipment, one is because of its low carbon content, and its wear resistance is low; Extensive application of steel grades

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

[0011] A chromium-nickel-nitrogen rare earth anti-wear and heat-resistant steel is characterized in that it comprises the following raw materials in mass percentage: C0.4%, Cr26.0%, Ni8.0%, Si0.6%, Mn0.8%, N0.2 %, RE0.05%, S0.02%, P0.01%, Ti0.1%, and the balance is Fe.

[0012] The beneficial effect of the present invention is: (1) chrome-nickel-nitrogen rare-earth wear-resistant and heat-resistant steel should first rationally design composition, make main alloying element (Cr, Ni) and auxiliary element (N, RE and Ti) match reasonably, in cast state The austenite + carbide structure can be obtained under the condition of high temperature to ensure the strength, oxidation resistance and wear resistance of the material. (2) Chromium-nickel-nitrogen rare earth anti-wear and heat-resistant steel has good oxidation resistance. At 1200°C, the average oxidation rate is <0.3g / (m2×h), which is an anti-oxidation material; the tensile strength at room temperature is 640-760MPa, and the ...

Embodiment 2

[0014] A chromium-nickel-nitrogen rare earth anti-wear and heat-resistant steel is characterized in that it includes the following raw materials in mass percentage: C0.8%, Cr30.0%, Ni10.0%, Si1.2%, Mn1.2%, N0.3 %, RE0.15%, S0.04%, P0.05%, Ti0.3%, and the balance is Fe.

[0015] The beneficial effect of the present invention is: (1) chrome-nickel-nitrogen rare-earth wear-resistant and heat-resistant steel should first rationally design composition, make main alloying element (Cr, Ni) and auxiliary element (N, RE and Ti) match reasonably, in cast state The austenite + carbide structure can be obtained under the condition of high temperature to ensure the strength, oxidation resistance and wear resistance of the material. (2) Chromium-nickel-nitrogen rare earth anti-wear and heat-resistant steel has good oxidation resistance. At 1200°C, the average oxidation rate is <0.3g / (m2×h), which is an anti-oxidation material; the tensile strength at room temperature is 640-760MPa, and the ...

Embodiment 3

[0017] A chromium-nickel-nitrogen rare earth wear-resistant and heat-resistant steel is characterized in that it includes the following raw materials in mass percentages: C0.6%, Cr28.0%, Ni9.0%, Si0.9%, Mn1.0%, N0.25 %, RE0.10%, S0.03%, P0.03%, Ti0.2%, and the balance is Fe.

[0018] The beneficial effect of the present invention is: (1) chrome-nickel-nitrogen rare-earth wear-resistant and heat-resistant steel should first rationally design composition, make main alloying element (Cr, Ni) and auxiliary element (N, RE and Ti) match reasonably, in cast state The austenite + carbide structure can be obtained under the condition of high temperature to ensure the strength, oxidation resistance and wear resistance of the material. (2) Chromium-nickel-nitrogen rare earth anti-wear and heat-resistant steel has good oxidation resistance. At 1200°C, the average oxidation rate is <0.3g / (m2×h), which is an anti-oxidation material; the tensile strength at room temperature is 640-760MPa, an...

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
tensile strengthaaaaaaaaaa
Rockwell hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a chromium nickel nitrogen rare-earth wear-resistant and heat-resistant steel, which is characterized by including the following raw materials: 0.4-0.8% of C, 26.0-30% of Cr, 8.0-10% of Ni, 0.6-1.2% of Si, 0.8-1.2% of Mn, 0.2-0.3% of N, 0.05-0.15% of RE, 0.02-0.04% of S, 0.01-0.05% of P, 0.1-0.3% of Ti, and the balance of Fe. The invention has the following beneficial effects: (1) the chromium nickel nitrogen rare-earth wear-resistant and heat-resistant steel has rational design of components, so that the main alloying elements (Cr, Ni) and auxiliary elements (N, RE and Ti) are reasonably matched, and austenite and carbides tissue can be obtained under cast condition, so as to ensure the strength, antioxidant properties and wear resistance under high temperature of the material; 2) the chromium nickel nitrogen rare-earth wear-resistant and heat-resistant steel has good antioxidation performance, and average rate of oxidation of less than 0.3g / (m<2> * h) at 1200 DEG C, and belongs to the antioxidant materials; the steel has tensile strength of 640-760 MPa, impact toughness of 15-20J / cm<2> and Rockwell hardness of HRC23-28; and the material has good casting and welding process property and is suitable for manufacturing various wear resistant parts of cement thermal equipment; and (3) the cement thermal equipment wear resistant parts have service life increased by 20%-40% than common Cr25Ni20 heat-resistant parts.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a chromium-nickel-nitrogen rare earth wear-resistant and heat-resistant steel. Background technique [0002] The substantial increase in China's cement output has accelerated the process of modernization of cement production industrial equipment, and at the same time puts forward higher requirements for the performance of wear and heat-resistant parts of cement thermal equipment. At present, high-chromium-nickel heat-resistant steels are mainly used abroad, such as SCH21, HH, HI and Cr25Ni20. Using these heat-resistant steels to manufacture wear-resistant and heat-resistant parts of cement thermal equipment, one is because of its low carbon content, and its wear resistance is low; A large number of applications of steel grades. In order to ensure the safe operation of cement thermal equipment and further improve the life of its wear-resistant and heat-resistant...

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): C22C38/50
Inventor 汪德发
Owner 安徽中建材开源新材料科技有限公司