Martensite-ferrite double-phase wear-resisting steel plate and preparing method thereof

A wear-resistant steel plate and martensite technology, which is applied in the field of martensite-ferrite dual-phase wear-resistant steel plate and its preparation, can solve the problem that the hardness, low temperature toughness and wear resistance are difficult to meet the actual use requirements, and the impact toughness is difficult to guarantee. , poor toughness and plasticity, etc., to achieve the effect of improving rigidity, good strength and toughness coordination, and reducing stress concentration

Active Publication Date: 2016-05-04
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the extremely high hardness of the martensite structure, it determines its poor ductility and plasticity
For example, the patent of Wuyang Iron and Steel Company "A high-grade wear-resistant steel plate and its production method (application number: 200910312254.6)" only gives the hardness of the steel plate (445-485HB) and the low-temperature impact toughness at room temperature. It is difficult to guarantee the impact toughness below the temperature; Baosteel patent "a low-alloy high-strength high-toughness wear-resistant steel plate and its manufacturing method (application number: 200910045274.1)" pointed out that the produced steel plate has good toughness, but the toughness referred to is room temp

Method used

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  • Martensite-ferrite double-phase wear-resisting steel plate and preparing method thereof
  • Martensite-ferrite double-phase wear-resisting steel plate and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The chemical composition of embodiment 1 is as shown in table 1. Carry out electric furnace or converter smelting according to the chemical composition of Example 1 in Table 1, pour into continuous casting slabs or steel ingots after refining, heat the continuous casting slabs or steel ingots to 1200 ° C, keep warm for 3 hours, and then carry out controlled rolling and controlled cooling process, in which the finishing rolling temperature of rough rolling is 1040°C, and the pass reduction rate is not less than 15%; the starting temperature of finishing rolling is 880°C, the finishing rolling temperature is 840°C, and the rolling thickness of the steel plate is 20mm; the steel plate is controlled after rolling Cooling, the final cooling temperature is 640°C, and then air-cooled to room temperature; finally, the steel plate is heat treated, wherein the quenching temperature is 810°C, the holding time is 10min, the tempering temperature is 210°C, and the tempering time is 6...

Embodiment 2

[0062] The chemical composition of embodiment 2 is as shown in table 1. Carry out electric furnace or converter smelting according to the chemical composition of Example 2 in Table 1, pour into continuous casting slab or steel ingot after refining, heat continuous casting slab or steel ingot to 1220 ℃, keep warm for 3.5 hours, then carry out controlled rolling and controlled cooling process, in which the finishing rolling temperature of rough rolling is 1050°C, and the pass reduction rate is not less than 15%; the starting temperature of finishing rolling is 880°C, the finishing rolling temperature is 830°C, and the rolling thickness of the steel plate is 30mm; the steel plate is controlled after rolling Cooling, the final cooling temperature is 620°C, and then air-cooled to room temperature; finally, the steel plate is heat treated, wherein the quenching temperature is 795°C, the holding time is 15min, the tempering temperature is 190°C, and the tempering time is 100min.

[0...

Embodiment 3

[0065] The chemical composition of embodiment 3 is as shown in table 1. Carry out smelting in electric furnace or converter according to the chemical composition of Example 3 in Table 1, pour into continuous casting slab or steel ingot after refining, heat the continuous casting slab or steel ingot to 1180 ℃, keep warm for three hours, then carry out controlled rolling and controlled cooling process, wherein the finishing rolling temperature of rough rolling is 1030°C, and the pass reduction rate is not less than 15%; the starting temperature of finishing rolling is 880°C, the finishing rolling temperature is 825°C, and the rolling thickness of the steel plate is 12mm; the rolled steel plate is air-cooled to Room temperature; finally, the steel plate is subjected to heat treatment, wherein the quenching temperature is 805°C, the holding time is 15min, the tempering temperature is 190°C, and the tempering time is 35min.

[0066] In the structure obtained in this embodiment, the...

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Abstract

The invention provides a martensite-ferrite double-phase wear-resisting steel plate and a preparing method thereof. The martensite-ferrite double-phase wear-resisting steel plate comprises a martensite and ferrite double-phase structure, the volume fraction of the martensite structure is larger than 90%, the hardness of the martensite structure ranges from 480HB to 560HB, and the martensite structure is obtained by preparing C, Si, Mn, P, S, Nb, V, Ti, Mo, Ni, Cr, Al, B, N, Fe and other elements of the specific amount. The martensite-ferrite double-phase wear-resisting steel plate has the higher hardness and meanwhile has the good low-temperature toughness and wear-resisting performance; and manufacturing of mechanical parts under the atrocious environment particularly the condition with the extremely low temperature is facilitated. The preparing method of the martensite-ferrite double-phase wear-resisting steel plate is simple in process, the martensite and ferrite double-phase structure can be obtained, the hardness, the low-temperature toughness and the wear-resisting performance of the martensite and ferrite double-phase structure can be comprehensively improved, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to the technical field of low-alloy steel, in particular to a martensite-ferrite dual-phase wear-resistant steel plate and a preparation method thereof. Background technique [0002] Wear is one of the main failure modes of materials. Every year, a large amount of material and energy loss are caused by wear. The development and use of high-performance wear-resistant materials is an effective means to reduce wear. As an important wear-resistant steel material, low-alloy wear-resistant steel is widely used in engineering, mining, construction, agriculture, cement production, ports, electric power and metallurgy and other machinery manufacturing products, such as bulldozers, loaders, excavators, Manufacture of dump trucks, shield machines, roadheaders and other mining machinery, as well as chemical, paper and waste treatment equipment. [0003] The low-alloy wear-resistant steel plate with a Brinell hardness of 480-560HB is a high-g...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/12C22C38/14C22C38/08C22C38/18C22C38/06C21D8/02C21D6/00
CPCC21D6/005C21D8/0226C21D8/0247C21D8/0263C21D2211/005C21D2211/008C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/18C22C38/32
Inventor 邓想涛王昭东王国栋张逖陈林恒
Owner NORTHEASTERN UNIV
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