Unlock instant, AI-driven research and patent intelligence for your innovation.

Abrasion resistant steel having excellent hardness and impact toughness, and manufacturing method therefor

A technology of impact toughness and wear-resistant steel, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of increased manufacturing cost, reduced weldability and low temperature toughness, etc., and achieve the effect of excellent low temperature toughness and high hardness

Pending Publication Date: 2021-05-07
浦项股份有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to manufacture extremely thick steel plates, it may be necessary to add a larger amount of hardenable elements to ensure hardenability in the center of the steel plate, and due to the large amount of C and hardenable alloys added, the manufacturing cost may increase, and the weldability and low temperature toughness may be reduced, which may be problematic

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Abrasion resistant steel having excellent hardness and impact toughness, and manufacturing method therefor
  • Abrasion resistant steel having excellent hardness and impact toughness, and manufacturing method therefor
  • Abrasion resistant steel having excellent hardness and impact toughness, and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0071] Hereinafter, the present disclosure will be described in more detail with reference to embodiments. However, it should be noted that the following embodiments are provided to describe the present disclosure in more detail and do not limit the scope of the present disclosure. The scope of the present disclosure can be determined by the matters described in the claims and matters reasonably inferred therefrom.

Embodiment approach

[0073] Steel slabs having the alloy compositions in the following Tables 1 and 2 were prepared, and the steel slabs were subjected to steel slab heating-rough rolling-hot rolling-cooling (room temperature)-reheating-water cooling under the conditions in the following Table 3 to produce heat Rolled steel. The microstructure and mechanical properties of the hot-rolled steel sheets were measured, and the results are listed in Table 4 below.

[0074] In this case, for the microstructure, a sample was cut into an arbitrary size to make a mirror surface, the surface was etched using a nital etching solution, and the 1 / 2t position (center of the thickness) was observed using an optical microscope and a scanning electron microscope.

[0075] Hardness and toughness were measured using a Brinell hardness tester (3000 kgf load, 10 mm tungsten indenter) and a Charpy impact tester, respectively. For the surface hardness, the average value of values ​​obtained by grinding the surface of th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
hardnessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

One embodiment of the present invention provides an abrasion resistant steel having excellent hardness and impact toughness, and a manufacturing method therefor, the abrasion resistant steel comprising, by wt%, 0.33-0.42% of carbon (C), 0.1-0.7% of silicon (Si), 0.6-1.6% of manganese (Mn), 0.05% or less of phosphorus (P) (excluding 0), 0.02% or less of sulfur (S) (excluding 0), 0.07% or less of aluminum (Al) (excluding 0), 0.55-5.0% of nickel (Ni), 0.01-1.5% of copper (Cu), 0.01-0.8% of chromium (Cr), 0.01-0.8% of molybdenum (Mo), 50 ppm or less of boron (B) (excluding 0), and 0.02% or less of cobalt (Co) (excluding 0), further comprising one or more selected from the group consisting of 0.02% or less of titanium (Ti) (excluding 0), 0.05% or less of niobium (Nb) (excluding 0), 0.05% or less of vanadium (V) (excluding 0) and 2-100 ppm of calcium (Ca), and comprising the balance of Fe and other inevitable impurities, wherein C and Ni satisfy the following relation 1, and the microstructure comprises 95 area% or more of martensite and 5% or less of bainite (including 0%). [Relation 1] [C]*[Ni]>=0.231.

Description

technical field [0001] The present disclosure relates to a high-hardness wear-resistant steel and a method of manufacturing the same, and more particularly, to a high-hardness wear-resistant steel that can be used for construction machinery and the like and a method of manufacturing the same. Background technique [0002] For construction machinery and industrial machinery used in many fields of industry such as construction, civil engineering, mining and the cement industry, due to the severe wear caused by friction in operation, it may be necessary to apply materials exhibiting wear-resistant properties. [0003] Generally, since wear resistance and hardness of a thick steel plate may be correlated with each other, it may be necessary to increase the wear-related hardness of the thick steel plate. In order to ensure stable wear resistance, it may be necessary to have uniform hardness from the surface of the thick steel plate to the inside of the plate thickness (near t / 2, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/42C22C38/44C22C38/54C22C38/52C22C38/04C22C38/02C22C38/06C21D8/02
CPCC22C38/44C22C38/42C22C38/54C22C38/04C22C38/02C22C38/58C22C38/52C21D6/005C21D6/008C21D6/004C21D1/18C21D1/60C21D8/0226C21D8/0263C21D9/46C21D2211/008C22C38/50C22C38/48C22C38/46C22C38/002C22C38/06C22C38/008C22C38/00C21D8/02C21D8/0205C21D6/00C21D8/005C21D9/0081C21D2211/002C22C38/001
Inventor 刘承皓郑永镇赵南泳
Owner 浦项股份有限公司