High-toughness and ultrahigh-strength wear-resistant steel plate and production method thereof

An ultra-high-strength, wear-resistant steel plate technology, applied in the manufacture of converters, etc., can solve the problems of high carbon content, high cost, and low hardness, and achieve good strength and toughness matching, good welding performance, and cost savings.

Inactive Publication Date: 2010-02-03
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the patent No. ZL 200510078257.X announced on January 7, 2009, named "high-strength wear-resistant steel and its manufacturing method", has high strength and toughness indicators, but high carbon content and weldability not good
Another example is the invention patent application of Shenyang Heavy Machinery Group published on May 13, 2009, titled "A high-strength wear-resistant steel plate that can be welded without heat treatment and its preparation method", and its steel has good toughness and weldability But the strength and hardness are lower
The patent No. ZL 200810047196.4 published by WISCO on August 27, 2008, titled "A super-high-strength wear-resistant steel plate and its production method", the chemi...

Method used

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  • High-toughness and ultrahigh-strength wear-resistant steel plate and production method thereof
  • High-toughness and ultrahigh-strength wear-resistant steel plate and production method thereof
  • High-toughness and ultrahigh-strength wear-resistant steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The chemical composition of A test steel smelted according to the above scheme is shown in Table 1

[0025] Table 1 Chemical composition of experimental steel A (mass percent w%)

[0026]

[0027] Ceq=C+Mn / 6+(Cr+Mo+V) / 5+(Cu+Ni) / 15;

[0028] Produce table 1 composition A steel by the inventive method, it is characterized in that control following process parameter:

[0029] Slab heating stage: heat the smelted steel slab at 1200°C for 3 hours;

[0030] The starting temperature of rough rolling is 1080℃, and the finishing temperature of rough rolling is 1050℃;

[0031] The starting temperature of finish rolling is 940°C, and the finishing temperature of finish rolling is 910°C;

[0032] In the heat treatment stage, the quenching temperature is 930°C, the heating time is 30min (2.5min / mm×plate thickness), quenching is carried out in the laboratory test quenching machine, the cooling rate is about 60°C / s, the tempering temperature is 250°C, and the heating time It is...

Embodiment 2

[0034] The chemical composition of the B test steel smelted according to the above scheme is shown in Table 2 below:

[0035] Table 2 Chemical composition of experimental steel B (mass percentage w%)

[0036]

[0037] Ceq=C+Mn / 6+(Cr+Mo+V) / 5+(Cu+Ni) / 15;

[0038] Produce the composition B steel of last table by the inventive method, it is characterized in that control following process parameter:

[0039] Slab heating stage: heat the smelted steel slab at 1200°C for 3 hours;

[0040] The starting temperature of rough rolling is 1100℃, and the finishing temperature of rough rolling is 1120℃;

[0041] The finish rolling start temperature is 930°C, and the finish rolling finish temperature is 880°C;

[0042] In the heat treatment stage, the quenching heating temperature is 900°C, the heating time is 36min (according to 3min / mm×plate thickness), quenching is carried out in the laboratory test quenching machine, the cooling rate is about 60°C / s, and the tempering temperature is...

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Abstract

The invention provides a high-toughness and ultrahigh-strength wear-resistant steel plate and a production method thereof. The steel comprises the following chemical compositions by mass percent: 0.15-0.26% of C, 0.20-0.55% of Si, 1.0-1.60% of Mn, P less than or equal to 0.020%, S less than or equal to 0.010%, 0.00-0.60% of Mo, 0.00-0.50% of Ni, 0.20-1.00% of Cr, 0.01-0.05% of Ti, 0.02-0.04% of Als, 0.0005-0.004% of B and the balance Fe and inevitable impurities. The production method of the steel comprises the following steps: high clean steel smelting, hot metal desulphurizing, converter top-bottom blowing, vacuum processing and blank casting, in particular to plate blank heating, rough rolling, finish rolling and heat treatment technology parameter controlling. The chemical compositionsof the steel contain no V, Mo or Ni, or contain less Mo and Ni, therefore, the steel plate is low in alloy content and fine in toughness and can be widely applied to the mines and construction machinery products, which feature bad working conditions and have high requirements on steel properties.

Description

technical field [0001] The invention relates to the field of low-alloy steel manufacturing, and relates to a high-toughness and ultra-high-strength wear-resistant steel plate and a production method thereof. Background technique [0002] Wear-resistant steel plates are widely used in mechanical products such as bulldozers, loaders, excavators, All kinds of mining machinery, etc. However, with the development of machinery manufacturing industry, higher requirements are put forward for the production of wear-resistant steel. The strength and hardness of wear-resistant steel tend to be higher, so as to be suitable for harsh working environments and reduce the weight of the fuselage. Better matching of strength and toughness is required to improve the service life of equipment. Due to the increasingly prominent role of welding technology in mechanical production, it is required that wear-resistant steel should have better welding performance. At the same time, alloy addition...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/54C22C38/38C22C38/32C22C33/04C21C1/02C21C5/30C21C7/10C21D8/02C21D1/18
Inventor 王昭东袁国邓想涛李勇田勇王国栋
Owner NORTHEASTERN UNIV
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