CN103602911B

CN103602911B - A kind of heat resistant and wear resistant steel alloy lining material and preparation method thereof

Info

Publication number: CN103602911B
Application number: CN201310583162.8A
Authority: CN
Inventors: 丁健; 葛浩; 汪俊; 夏岩磊; 杨玭; 刘克忠
Original assignee: Chuzhou University
Current assignee: Chuzhou University
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2016-01-20
Anticipated expiration: 2033-11-20
Also published as: CN103602911A

Abstract

A kind of heat resistant and wear resistant steel alloy lining material, the chemical element composition that it contains and mass percent thereof are: carbon 0.2-0.4, silicon 0.2-0.4, manganese 3.5-3.7, chromium 0.7-0.9, molybdenum 0.8-1.1, vanadium 1.2-1.4, lanthanum 0.1-0.15, Nb0.04-0.07, S≤0.04, P≤0.04, surplus are iron.Liner plate of the present invention adds the elements such as lanthanum, molybdenum, niobium on the basis of middle low carbon steel, and the steel alloy obtained not only has high hardness, high strength, wear resistance are good, high temperature resistant, but also has good toughness, good, the corrosion resistant advantage of plasticity, and cost performance is high.The present invention uses part scrap iron as raw material, and through secondary refining, conservative control casting postheat treatment temperature, throwing raw materials in batches, improves comprehensive mechanical property.Refining agent of the present invention is used for Foundry Production, and the degree of porosity in foundry goods reduces 1-2 degree, and oxide inclusion is at about 2 grades.

Description

A kind of heat resistant and wear resistant steel alloy lining material and preparation method thereof

Technical field

The present invention relates to metal material field, particularly relate to a kind of heat resistant and wear resistant steel alloy lining material and preparation method thereof.

Background technology

Lining material, through the development of more than 30 years, experienced by high violent steel, common spoken parts in traditional operas cast steel, ni-hard cast iron, high chromium white iron to the developmental stage of the middle-low alloy steel of modified high manganese steel and various Q-tempering technique.In practical application domestic at present, be still that high mangaenese steel rules all the land, in several main flow material, high mangaenese steel good toughness, but wear resistance and erosion resistance are also undesirable; Wear resistance of high-chromium iron is good, but toughness is poor again; Middle-low alloy steel fragility and erosion resistance are not up to standard.Need, from the more excellent lining material of the aspect such as starting material, technique research and development over-all properties, to enhance productivity, to reduce wear, reduce costs.

Summary of the invention

The object of the present invention is to provide a kind of heat resistant and wear resistant steel alloy lining material and preparation method thereof, it is high that this alloy material has intensity, and wear resistance is good, high temperature resistant, the advantage of good toughness.

Technical scheme of the present invention is as follows:

A kind of heat resistant and wear resistant steel alloy lining material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 0.2-0.4, silicon 0.2-0.4, manganese 3.5-3.7, chromium 0.7-0.9, molybdenum 0.8-1.1, vanadium 1.2-1.4, lanthanum 0.1-0.15, Nb0.04-0.07, S≤0.04, P≤0.04, surplus are iron.

The production method of described heat resistant and wear resistant steel alloy lining material, is characterized in that:

(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:1-2 ratio, the pig iron is added drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) chromium, vanadium; (2) silicon, manganese, lanthanum; (3) other remaining components; The each batch of timed interval of dropping into element is 23-25 minute, stirs after feeding intake.

Described casting postheat treatment is: first by room temperature with 200-220 DEG C/h of ramp to 500-510 DEG C, insulation 60-70 minute, again with 200-220 DEG C/h of ramp to 700-710 DEG C, 600-610 DEG C is cooled to again with 190-200 DEG C/h of speed, again with 220-230 DEG C/h of ramp to 940-950 DEG C, insulation 3-4 hour; Be cooled to 600-610 DEG C with 180-190 DEG C/h of speed again, insulation 50-60 minute, then be cooled to 490-500 DEG C with 180-190 DEG C/h of speed, insulation 70-80 minute; 220-230 DEG C is cooled to again, insulation 2-3 hour with 170-180 DEG C/h of speed; Again with 200-220 DEG C/h of ramp to 330-350 DEG C, then be cooled to 200-210 DEG C with 160-170 DEG C/h of speed, then with 180-190 DEG C/h of ramp to 530-550 DEG C, insulation 2-3 hour, takes out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 30-40, medical stone 1-2, Calcium Fluoride (Fluorspan) 3-4, magnesium oxide 6-7, iron(ic) chloride 1-2, feldspar in powder 2-3, Tremoliteor Tremoliteasbestos 5-6, magnesium sulfate 2-3, nano silicon 2-3, jade powder 3-4, montmorillonite 1-2, potassium silicofluoride 4-5; Each raw material mixes by preparation method, is heated to molten state, then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 DEG C, 3-4 hour is calcined, after cooling, be ground into 150-250 order powder again, obtain final product.

Beneficial effect of the present invention

Liner plate of the present invention adds the elements such as lanthanum, molybdenum, niobium on the basis of middle low carbon steel, and the steel alloy obtained not only has high hardness, high strength, wear resistance are good, high temperature resistant, but also has good toughness, good, the corrosion resistant advantage of plasticity, and cost performance is high.The present invention uses part scrap iron as raw material, and through secondary refining, conservative control casting postheat treatment temperature, throwing raw materials in batches, makes alloy quality more stable uniform, improves comprehensive mechanical property.Refining agent of the present invention is used for Foundry Production, significantly improves yield rate, and the degree of porosity particularly in foundry goods reduces 1-2 degree, and can not produce pore at cast(ing) surface, trapped oxide also obviously reduces, and oxide inclusion is at about 2 grades.

Embodiment

A kind of heat resistant and wear resistant steel alloy lining material, the chemical element composition that it contains and mass percent thereof are: carbon 0.2-0.4, silicon 0.2-0.4, manganese 3.5-3.7, chromium 0.7-0.9, molybdenum 0.8-1.1, vanadium 1.2-1.4, lanthanum 0.1-0.15, Nb0.04-0.07, S≤0.04, P≤0.04, surplus are iron.

The production method of described heat resistant and wear resistant steel alloy lining material is as follows:

(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:1.6 ratio, the pig iron is added drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) chromium, vanadium; (2) silicon, manganese, lanthanum; (3) other remaining components; The each batch of timed interval of dropping into element is 24 minutes, stirs after feeding intake.

Described casting postheat treatment is: first by room temperature with 210 DEG C/h of ramp to 505 DEG C, be incubated 65 minutes, then with 210 DEG C/h of ramp to 705 DEG C, then be cooled to 605 DEG C with 195 DEG C/h of speed, again with 225 DEG C/h of ramp to 945 DEG C, be incubated 3.5 hours; Be cooled to 605 DEG C with 185 DEG C/h of speed again, be incubated 55 minutes, then be cooled to 495 DEG C with 185 DEG C/h of speed, be incubated 75 minutes; Be cooled to 225 DEG C with 175 DEG C/h of speed again, be incubated 2.5 hours; Again with 210 DEG C/h of ramp to 340 DEG C, then be cooled to 205 DEG C with 165 DEG C/h of speed, then with 185 DEG C/h of ramp to 540 DEG C, be incubated 2.5 hours, take out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part (kilogram): instrument comminuted steel shot 35, medical stone 1.5, Calcium Fluoride (Fluorspan) 3.5, magnesium oxide 6.5, iron(ic) chloride 1.5, feldspar in powder 2.5, Tremoliteor Tremoliteasbestos 5.5, magnesium sulfate 2.5, nano silicon 2.5, jade powder 3.5, montmorillonite 1.5, potassium silicofluoride 4.5; Each raw material mixes by preparation method, is heated to molten state, then, is poured into Quench in pure water, then is ground into 150 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2.6%, the nano-carbon powder of 1.5%, after mixing, under 11Mpa, be pressed into base, then, calcine 3.6 hours at 940 DEG C, after cooling, then be ground into 190 order powder, obtain final product.

The mechanical property of heat resistant and wear resistant steel alloy lining material of the present invention is: tensile strength 1121MPa, yield strength 925MPa, unit elongation 14.7%, relative reduction in area 30.7%, impact absorbing energy 53.7J, impelling strength 63J/cm2, hardness 271HB.

Claims

1. a heat resistant and wear resistant steel alloy lining material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 0.2-0.4, silicon 0.2-0.4, manganese 3.5-3.7, chromium 0.7-0.9, molybdenum 0.8-1.1, vanadium 1.2-1.4, lanthanum 0.1-0.15, Nb0.04-0.07, S≤0.04, P≤0.04, surplus are iron;

The production method of described heat resistant and wear resistant steel alloy lining material is:

(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:1-2 ratio, the pig iron is added drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment;

(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) chromium, vanadium; (2) silicon, manganese, lanthanum;

(3) other remaining components; The each batch of timed interval of dropping into element is 23-25 minute, stirs after feeding intake;

Described casting postheat treatment is: first by room temperature with 200-220 DEG C/h of ramp to 500-510 DEG C, insulation 60-70 minute, again with 200-220 DEG C/h of ramp to 700-710 DEG C, 600-610 DEG C is cooled to again with 190-200 DEG C/h of speed, again with 220-230 DEG C/h of ramp to 940-950 DEG C, insulation 3-4 hour; Be cooled to 600-610 DEG C with 180-190 DEG C/h of speed again, insulation 50-60 minute, then be cooled to 490-500 DEG C with 180-190 DEG C/h of speed, insulation 70-80 minute; 220-230 DEG C is cooled to again, insulation 2-3 hour with 170-180 DEG C/h of speed; Again with 200-220 DEG C/h of ramp to 330-350 DEG C, then be cooled to 200-210 DEG C with 160-170 DEG C/h of speed, then with 180-190 DEG C/h of ramp to 530-550 DEG C, insulation 2-3 hour, takes out air cooling and get final product;