Low-alloy high-strength high-toughness wear-resistant steel plate and manufacturing method thereof

A low-alloy high-strength, wear-resistant steel plate technology, applied in the field of wear-resistant steel, can solve problems such as no economic and social benefits, increase steel production costs, affect weldability, etc., achieve good reality and feasibility, improve Product strength, the effect of improving wear resistance

Active Publication Date: 2011-10-12
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Increasing the content of alloying elements in steel can obtain excellent mechanical properties, but it affects its weldability and increases the production cost of steel, so it does not have good economic and social benefits

Method used

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  • Low-alloy high-strength high-toughness wear-resistant steel plate and manufacturing method thereof
  • Low-alloy high-strength high-toughness wear-resistant steel plate and manufacturing method thereof
  • Low-alloy high-strength high-toughness wear-resistant steel plate and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] The chemical composition of the low-alloy high-strength high-toughness wear-resistant steel plate of the present invention and the comparative steel 1 (JP2006506526) are shown in Table 2. Smelt in electric furnace or converter according to the chemical composition shown in Table 2, and cast into continuous casting slab or steel ingot, heat the continuous casting slab or steel ingot to 1050°C, start rolling temperature at 1000°C, finish rolling temperature at 840°C, finished steel plate thickness 8mm, air cooling after rolling, quenching heating temperature is Ac 3 , the tempering temperature is 150 ℃, stacking or cooling bed cooling after tempering.

Embodiment 2

[0058] The implementation method is the same as in Example 1, wherein the heating temperature is 1070°C, the rolling start temperature is 1030°C, the final rolling temperature is 870°C, the thickness of the finished steel plate is 15mm, and the quenching heating temperature is Ac 3 +20°C, tempering temperature is 200°C, after tempering, stack or cool down in a cooling bed.

Embodiment 3

[0060] The implementation method is the same as in Example 1, wherein the heating temperature is 1080°C, the rolling start temperature is 1045°C, the final rolling temperature is 880°C, the thickness of the finished steel plate is 30mm, and the quenching heating temperature is Ac 3 +30°C, tempering temperature is 220°C, after tempering, stack or cool down in a cooling bed.

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Abstract

The invention provides a low-alloy high-strength high-toughness wear-resistant steel plate which is characterized in that the low-alloy high-strength high-toughness wear-resistant steel plate comprises the following chemical compositions in percentage by weight: 0.15-0.27 wt% of C, 0.20-1.0 wt% of Si, 0.80-1.8 wt% of Mn, less than 0.030 wt% of P, less than 0.010 wt% of S, 0.20-1.0 wt% of Cr, 0.10-0.40 wt% of Mo, 0.010-0.040 wt% of Nb, 0.0005-0.0040 wt% of B, 0.020-0.060 wt% of Al, 0.004-0.030 wt% of Ti and balance of Fe and inevitable impurities; and in addition, the contents of Cr, Mo and Nbsatisfy the condition: Cr+Mo+Nb is more than or equal to 0.35 wt%, and the contents of Cr and Mo satisfy the condition: Cr / Mo is more than or equal to 1.2. The low-alloy high-strength high-toughness wear-resistant steel plate of the invention has the charateristics that the hardness is more than 450 HB, the tensile strength is more than 1500 MPa, the yield strength is more than 1200 MPa, the elongation ratio is more than 15%, the impact energy is more than 80 J, the plate thickness can reach 80 mm, and fine texture can be martensite or martensite and retained austenite. The steel has low production cost, simple and easily mastered production process, high strength and hardness and favorable toughness and weldability.

Description

technical field [0001] The invention relates to wear-resistant steel, in particular to a low-alloy, high-strength, high-toughness wear-resistant steel plate and a manufacturing method thereof. Background technique [0002] Today, with the rapid development of science and technology and modern industry, the operating speed of mechanical equipment is getting higher and higher, and many workpieces and equipment fail rapidly due to wear and tear, resulting in material waste and economic losses that are quite alarming. According to incomplete statistics, only in metallurgy, mining, electric power, coal and agricultural machinery sectors in my country, the economic loss caused by workpiece wear is about 40 billion yuan per year. Therefore, the development of wear-resistant materials has become an important factor affecting modern production efficiency. [0003] Traditionally, austenitic high manganese steel is generally used to produce wear-resistant parts. Austenitic high-manga...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/38C22C33/04C21D1/18
Inventor 李红斌姚连登赵小婷赵四新
Owner BAOSHAN IRON & STEEL CO LTD
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