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Manufacturing method of HB500 grade low-manganese wear-resistant steel plate

A wear-resistant steel plate and a manufacturing method technology, which is applied in the field of wear-resistant steel production, can solve the problems of wear-resistant steel, such as low hardness, low tensile strength, and can not meet the high wear resistance requirements of users, so as to achieve low production costs and improve service life. , the effect of high hardenability

Active Publication Date: 2012-03-28
NANJING IRON & STEEL CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, low-grade wear-resistant steel has low hardness and tensile strength, which cannot meet the high wear resistance requirements of users.

Method used

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  • Manufacturing method of HB500 grade low-manganese wear-resistant steel plate
  • Manufacturing method of HB500 grade low-manganese wear-resistant steel plate

Examples

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with specific examples of implementation.

[0028] A method for manufacturing the HB500 level low-manganese wear-resistant steel plate according to the present invention, the thickness of the continuous casting billet is 150mm.

[0029] According to the method of the present invention, 2 heats of test steels are trial-manufactured as an example. The process flow is: molten iron pretreatment → converter → LF → RH refining → continuous casting → billet inspection → air cooling → billet acceptance → heating → descaling → controlled rolling → controlled cooling → straightening → air cooling → steel plate surface inspection → cut to length → Quenching → Tempering → Sampling → Printing logo → Inspection → Storage.

[0030] The chemical composition (wt, %) of the examples is shown in Table 1.

[0031] Table 1

[0032] furnace number C mn P S Si Cr Alt Nb Mo Ti Ceq...

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Abstract

The invention discloses a manufacturing method of a HB500 grade low-manganese wear-resistant steel plate. The manufacturing method comprises the specific steps as follows: continuous casting billets meeting the requirements are selected; the rolling process is conducted: the heating temperature is 1100 to 1200 DEG C, the rolling is conducted at a crystallization region and an austenite non-recrystallization region by adopting austenite, the final rolling temperature is 1000 to 1050 DEG C, and the billets are roughly rolled into intermediate billets of 1.7 to 2.0 times the thickness; the finish rolling starting temperature is 850 to 920 DEG C, a laminar cooling manner is adopted, the final cooling temperature is 600 to 700 DEG C, and the cooling rate is 10 to 20 DEG C / S; the quenching process is conducted: the steel plate heating temperature is 860 to 940 DEG C, the heat preservation time is 10 to 30min, and the billets are cooled to a normal temperature at a cooling speed of 40 DEG C / S; and the tempering process is conducted: the quenching steel plate heating temperature is 150 to 300 DEG C, the billets are loaded to a cooling bed to be air-cooled after the heat of the billets is preserved for 1 to 3 hours, and then the HB500 grade low-manganese wear-resistant steel plate is obtained. The HB500 grade low-manganese wear-resistant steel plate has the advantages of high hardness, high strength and high toughness, and is suitable for being used in bulldozers, loaders, excavators, dump trucks and various mining machines.

Description

technical field [0001] The invention relates to the production of wear-resistant steel, in particular to a manufacturing method of HB500 wear-resistant steel plate with low manganese content. Background technique [0002] Wear-resistant steel is mainly used in mechanical equipment such as engineering, mining, construction, agriculture, cement production, port, electric power and metallurgy with harsh working conditions, such as bulldozers, loaders, excavators, dump trucks and various mining machinery. Not only high strength and hardness are required to resist wear, but also a certain impact resistance is required. According to different conditions of use, there are also differences in the performance requirements of wear-resistant steel products. Wear-resistant steel plates with different hardness and toughness should be used to achieve the purpose of prolonging the service life of mechanical equipment. At present, low-grade wear-resistant steel has low hardness and tensile...

Claims

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Application Information

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IPC IPC(8): C22C38/32C21D8/02
Inventor 姜在伟张逖王新王昭东邓想涛
Owner NANJING IRON & STEEL CO LTD
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