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Wear-resistant steel with high resistance to tempering and manufacturing method thereof

A technology of wear-resistant steel and tensile strength, applied in temperature control, metal rolling, etc., to achieve the effect of facilitating hot rolling operation, delaying austenite transformation, and shortening the process flow

Active Publication Date: 2011-06-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of thick plate rolling mill and heat treatment conditions, the minimum thickness of this kind of wear-resistant steel is relatively thick, generally exceeding 8mm, and there are very few steel plates below 6mm; the production process of wear-resistant steel by quenching heat treatment is long, the process is complicated, and the efficiency is relatively low ; Moreover, although the hardness of the quenched wear-resistant steel plate is very high when quenched or tempered at low temperature, the hardness decreases significantly when the tempering temperature rises. The usual processing or use temperature of this type of wear-resistant steel must not exceed 250 ° C, which is harmful to processing and manufacturing. There are no small restrictions on the use of

Method used

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Examples

Experimental program
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Embodiment Construction

[0041] Table 1 embodiment composition, by weight percentage:

[0042]

[0043] 4

[0044] 7

[0045] The hot rolling process parameters and properties of the above composition examples are shown in Table 2. The rolling state tensile strength of the strip steel in the embodiment exceeds 1100MPa, and the hardness is greater than 325HV, which has high strength and hardness, reaching the level of wear-resistant steel produced by quenching.

[0046] Table 2 embodiment hot rolling process parameter and performance

[0047]

[0048] After tempering at a temperature of up to 550° C., the steel plates of the above examples still have a tensile strength of over 1000 MPa and a hardness of over 300 HV, showing excellent tempering resistance, as shown in Table 3.

[0049] Hardness after tempering treatment of the embodiment of table 3

[0050]

[0051] 9

[0052] The alloying method of the invention is used to produce wear...

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Abstract

The invention relates to wear-resistant steel with high resistance to tempering and a method for manufacturing steel plates made of the same. The wear-resistant steel with high resistance to temperingcomprises the following components according to the weight percent: 0. 10 to 0.24 of C, 0.15 to 1.40 of Si, 1.20 to 2.00 of Mn, 0.40 to 1.60 of Cr, 0.15 to 0.50 of Mo, not more than 0.30 of Ni, not more than 0.12 of V, not more than 0.03 of Ti, not more than 0.05 of Al, not more than 0.015 of P, not more than 0.010 of S and the balanced Fe and inescapable impurities. The wear-resistant steel withhigh resistance to tempering can keep the strength and the rigidity at higher temperature, remarkably improves the use temperature, has simple process and saves the cost.

Description

technical field [0001] The invention relates to a wear-resistant steel with high tempering resistance and a manufacturing method of the wear-resistant steel plate with high tempering resistance. Background technique [0002] At present, wear-resistant steel plates with considerable strength and hardness are widely used in construction machinery such as bulldozers, excavators, heavy-duty loading vehicles, crushers, coal mills, and mine transmission systems. Grinding steel plates are mainly medium and heavy plate products. The steel plates are rolled by a thick plate rolling mill and then quenched to achieve high strength and high hardness; or through alloying treatment, relying on phase transformation strengthening during air cooling after rolling to obtain high strength and high hardness. Due to the limitation of thick plate rolling mill and heat treatment conditions, the minimum thickness of this kind of wear-resistant steel is relatively thick, generally exceeding 8mm, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/50B21B1/46B21B37/74
Inventor 唐文军江来珠
Owner BAOSHAN IRON & STEEL CO LTD
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