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HB600 non-quenched and tempered wear-resistant steel plate and its manufacturing method

A technology of wear-resistant steel plate and manufacturing method, which is applied in the field of wear-resistant steel plate, can solve the problems that the dimensional accuracy and shape accuracy of parts cannot be guaranteed, the shape of the steel plate is difficult to control, and the production cost of the process is increased, so as to achieve excellent atmospheric corrosion resistance, good The effect of plate shape and good atmospheric corrosion resistance

Active Publication Date: 2016-08-24
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the high-grade wear-resistant steel adopts the quenching and tempering process after hot rolling. The wear-resistant steel produced by the quenching and tempering process requires less alloying elements. The disadvantage is that the production cost of the process is increased, and the shape of the steel plate is difficult to control. increased production difficulty
If it is processed into parts and then quenched and tempered, the parts will be deformed during the quenching process and the dimensional accuracy and shape accuracy of the parts cannot be guaranteed.
[0005] In the prior art, the production method of wear-resistant steel is introduced, such as a kind of HB400 crack-resistant high-strength martensitic wear-resistant steel and its production method provided by the publication number CN 103243277A, which adopts the process route of online quenching and tempering. HB400 grade wear-resistant steel plate; the rest such as CN 103540729 A, CN 103266269 A, CN102230135A, CN102676922A, CN103114252A, CN102943213A and other patent publications all adopt quenching and tempering process to produce wear-resistant steel, and non-quenching and tempering process produces wear-resistant steel with hardness of HB600 The method of steel has not been reported

Method used

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  • HB600 non-quenched and tempered wear-resistant steel plate and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: The composition ratio and manufacturing method of the HB600 grade non-tempered wear-resistant steel plate are as follows.

[0032] The chemical composition of this HB600 non-quenched and tempered wear-resistant steel plate is as follows: C 0.44%, Si 0.50%, Mn 1.5%, P 0.007%, S 0.002%, Cr 1.0%, Mo 0.15%, Ni 0.5%, Cu 1.9%, Al 0.04%, B 0.002%, rare earth 0.002%, the rest is Fe and unavoidable impurities; the thickness is 30mm.

[0033]The above chemical components are smelted according to the mass percentage and cast into ingots, and the ingots are heated before rolling. The heating temperature is 1230° C. and the heating time is 3 hours. Two-stage controlled rolling is adopted, the rough rolling start temperature is 1150°C, the finish rolling temperature is 1050°C, the cumulative reduction rate of rough rolling is 51.5%; the finish rolling start temperature is 1030°C, the finish rolling temperature is 950°C, and the finish rolling cumulative The reduction rate...

Embodiment 2

[0034] Example 2: The composition ratio and manufacturing method of the HB600 grade non-quenched and tempered wear-resistant steel plate are as follows.

[0035] The chemical composition of this HB600 non-quenched and tempered wear-resistant steel plate is: C 0.45%, Si 0.40%, Mn 1.3%, P 0.009%, S 0.002%, Cr 0.95%, Mo 0.1%, Ni 0.6%, Cu 2.0%, Ti 0.1%, Al 0.02%, B 0.003%, rare earth 0.002%, the rest is Fe and unavoidable impurities; the thickness is 8mm.

[0036] The above chemical components are smelted according to mass percentage and cast into ingots, and the ingots are heated before rolling at a heating temperature of 1225° C. for 3 hours. Using two-stage controlled rolling, the rough rolling start temperature is 1130°C, the finish rolling temperature is 1040°C, and the cumulative reduction rate of rough rolling is 72.1%; The reduction rate is 82.6%, and the reduction rate in the last three passes is not less than 10%. The thickness of the plate after finishing rolling is 8m...

Embodiment 3

[0037] Example 3: The composition ratio and manufacturing method of the HB600 grade non-quenched and tempered wear-resistant steel plate are as follows.

[0038] The chemical composition of the 600HB grade non-quenched and tempered wear-resistant steel plate is as follows: C 0.35%, Si 0.30%, Mn 1.6%, P 0.005%, S 0.006%, Cr 0.3%, Mo 0.3%, Ni 1.2%, Cu 1.2%, Nb 0.2%, V 0.1%, B 0.001%, rare earth 0.001%, the rest is Fe and unavoidable impurities; the thickness is 50mm.

[0039] The above chemical components are smelted according to the mass percentage and cast into ingots, and the ingots are heated before rolling. The heating temperature is 1200° C. and the heating time is 3 hours. Two-stage controlled rolling is adopted, the rough rolling start temperature is 1120°C, the finish rolling temperature is 1030°C, and the cumulative reduction rate of rough rolling is 51.5%; the finish rolling start temperature is 1000°C, the finish rolling temperature is 920°C, the finish rolling tempe...

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Abstract

The invention discloses an HB600 grade wear-resistant non-quenched and tempered steel plate and a making method thereof. The method comprises the processes of smelting, casting, heating, rolling and cooling; and the steel plate comprises, by mass, 0.35-0.45% of C, 0.20-0.50% of Si, 1.20-1.60% of Mn, 0.015% or less of P, 0.01% or less of S, 0.2-1.0% of Cr, 0.1-0.5% of Mo, 0.5-1.5% of Ni, 1.0-2.0% of Cu, 0.2% or less of Ti, 0.2% or less of Nb, 0.2% or less of V, 0.05% or less of Al, 0.005% or less of N, 0.003% or less of O, 0.001-0.005% of B, 0-0.02% of rare earth, and the balance of Fe and inevitable impurities. A carbon content micro alloying mode is adopted, Cr, Ni, Cu, B and other hardenability effect improving elements and V and other precipitating reinforcement elements are properly added, hard phase martensite is obtained under a low cooling rate by using the high hardenability, and a large amount of carbon nitride formed by carbide forming elements is precipitated to improve the content of the hard phase in order to improve the wear resistance of the steel plate; and alloy elements containing Cu and Ni make the steel plate have excellent atmosphere corrosion resistance.

Description

technical field [0001] The invention relates to a wear-resistant steel plate, in particular to a HB600 non-tempered wear-resistant steel plate and a manufacturing method thereof. Background technique [0002] Wear-resistant steel is a type of steel material widely used in various wear conditions, such as metallurgy, mining, construction, electric power, agriculture, cement production, railways and military and other fields, such as bulldozers, loaders, excavators, Dump trucks and various mining machinery, grab buckets, stackers and reclaimers, feeding bending structures, etc. Key components include excavator bucket teeth, ball mill liners, crusher jaw plates, rolling mortar walls and tractor track shoes, etc. It has the effect of reducing the wear and tear of the equipment and prolonging its service life. [0003] With the development of mechanical equipment in the direction of high power and high speed, and the application of mechanical equipment under harsh working condit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/54C21D8/02
Inventor 田志强李建新常金宝张晓力张雲飞安治国张坤陈文李俊慧
Owner HEBEI IRON AND STEEL