CN103741072B

CN103741072B - A kind of containing antimony roll alloy steel material and preparation method thereof

Info

Publication number: CN103741072B
Application number: CN201310699999.9A
Authority: CN
Inventors: 陶国斌; 何玉平; 史承海; 晏绍斌; 屠明安
Original assignee: MAANSHAN FANGYUAN MATERIAL PROJECT CO Ltd
Current assignee: MAANSHAN FANGYUAN MATERIAL PROJECT CO Ltd
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2016-03-23
Anticipated expiration: 2033-12-19
Also published as: CN103741072A

Abstract

A kind of containing antimony roll alloy steel material, the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.0-2.3, molybdenum 0.4-0.7, vanadium 1.5-2.5, chromium 3.8-4.2, niobium 0.05-0.10, lanthanum 0.05-0.10, cobalt 1.1-1.4, Ni1.0-1.5, antimony 0.07-0.09, P≤0.030, S≤0.030, surplus are iron.The present invention by adding the multiple alloying elements such as antimony, niobium, lanthanum on the basis of high carbon steel, reduce the content of molybdenum, chromium, and through secondary refining, conservative control casting postheat treatment temperature, throwing raw materials in batches, make steel alloy have the characteristic of rapid steel, high temperature resistant, red hard height, rigidity and toughness are worked good, and it is good to have surface abrasion resistance, resistance to flaking is good, cold shortness is low, and the low feature of cost, obtained roll working life is long.

Description

A kind of containing antimony roll alloy steel material and preparation method thereof

Technical field

The present invention relates to roll technology field, particularly relate to a kind of containing antimony roll alloy steel material and preparation method thereof.

Background technology

Roll is the central module of wire rod machine, carries out gadolinium processing to gadolinium part, makes metal produce the main tool of viscous deformation.Roll working load is large, bears very large gadolinium pressing pressure and torsional moment, and has very strong shock load and very large mass force; In addition, the Working environment of roll is harsh, bear very high temperature, have water coolant again, is in the cold and hot lower work that accompanies each other, serious wear.

High carbon and chromium cast steel, the several types such as ordinary steel and Wimet.High carbon and chromium cast steel is owing to there being certain wear resistance, and low price, is therefore widely used, and the material that high carbon and chromium running roller steel is conventional has 13Cr13WMoV and 18Cr20WMoV.Because these two kinds of steel hardness and wear resistance mainly rely on the carbide Cr of chromium ₇c ₃and Cr ₂₃c ₆, thermostability is poor, generally more than 450 DEG C, starts agglomeration and softens gradually.550 DEG C time, hardness will be down to below HRC50.And the temperature of wire rod running roller under running can reach about 550 DEG C, this just makes running roller obviously reduce work-ing life.The secondary hardening temperature of ordinary steel is at about 550 DEG C, and hardness maintains HRC62 ~ 64, can improve the work-ing life of running roller significantly; Wimet also has good hot hardness and wear resistance.But because the manufacturing cost of ordinary steel and Wimet is too high, the use of high line running roller material is restricted.Therefore study excellent performance, the roll material that cost is cheaper just seems particularly important.

Summary of the invention

The object of the present invention is to provide a kind of containing antimony roll alloy steel material and preparation method thereof, this alloy material has that hardness is higher, wear resistance good, resistant to elevated temperatures advantage.

Technical scheme of the present invention is as follows:

A kind of containing antimony roll alloy steel material, it is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.0-2.3, molybdenum 0.4-0.7, vanadium 1.5-2.5, chromium 3.8-4.2, niobium 0.05-0.10, lanthanum 0.05-0.10, cobalt 1.1-1.4, Ni1.0-1.5, antimony 0.07-0.09, P≤0.030, S≤0.030, surplus are iron.

The described production method containing antimony roll alloy steel material, is characterized in that:

(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:0.5-1 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) vanadium, chromium, Ni; (2) tungsten, niobium, cobalt; (3) other remaining components; The each batch of timed interval of dropping into element is 20-23 minute, stirs after feeding intake.

Described casting postheat treatment is: first by room temperature with 200-210 DEG C/h of ramp to 710-720 DEG C, insulation 40-50 minute, then with 200-210 DEG C/h of ramp to 930-940 DEG C, insulation 4-5 hour; 580-590 DEG C is cooled to again with 180-190 DEG C/h of speed, then with 220-230 DEG C/h of ramp to 720-730 DEG C, then be cooled to 220-230 DEG C with 180-190 DEG C/h of speed, insulation 3-4 hour; Again with 100-110 DEG C/h of ramp to 330-350 DEG C, insulation 40-50 minute, then with 100-110 DEG C/h of ramp to 510-520 DEG C, insulation 4-5 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 3-5, clay 10-12, Sodium Silicofluoride 3-4, sodium carbonate 2-3, sodium tetraborate 1-2, stalk ashes 4-5, potassium felspar sand 36-40, jade powder 3-4, carclazyte 6-8, ground dolomite 3-4; Each raw material mixes by preparation method, is heated to 2600-2900 DEG C to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.

Beneficial effect of the present invention

The present invention by adding the multiple alloying elements such as antimony, niobium, lanthanum on the basis of high carbon steel, reduce the content of molybdenum, chromium, and through secondary refining, conservative control casting postheat treatment temperature, throwing raw materials in batches, make steel alloy have the characteristic of rapid steel, high temperature resistant, red hard height, rigidity and toughness are worked good, and it is good to have surface abrasion resistance, resistance to flaking is good, cold shortness is low, and the low feature of cost, obtained roll working life is long.The present invention uses part scrap iron as raw material, 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 containing antimony roll alloy steel material, the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.0-2.3, molybdenum 0.4-0.7, vanadium 1.5-2.5, chromium 3.8-4.2, niobium 0.05-0.10, lanthanum 0.05-0.10, cobalt 1.1-1.4, Ni1.0-1.5, antimony 0.07-0.09, P≤0.030, S≤0.030, surplus are iron.

The described production method containing antimony roll alloy steel material is as follows:

(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:0.8 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) vanadium, chromium, Ni; (2) tungsten, niobium, cobalt; (3) other remaining components; The each batch of timed interval of dropping into element is 22 minutes, stirs after feeding intake.

Described casting postheat treatment is: elder generation with 205 DEG C/h of ramp to 715 DEG C by room temperature, is incubated 45 minutes, then with 205 DEG C/h of ramp to 935 DEG C, is incubated 4.5 hours; 585 DEG C are cooled to again with 185 DEG C/h of speed, then with 225 DEG C/h of ramp to 725 DEG C, then be cooled to 225 DEG C with 185 DEG C/h of speed, be incubated 3.5 hours; Again with 105 DEG C/h of ramp to 340 DEG C, be incubated 45 minutes, then with 105 DEG C/h of ramp to 515 DEG C, be incubated 4.5 hours, take out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part (kilogram): described refining agent is made up of the raw material of following weight part (kilogram): instrument comminuted steel shot 3, clay 10, Sodium Silicofluoride 4, sodium carbonate 2, sodium tetraborate 1, stalk ashes 4, potassium felspar sand 36, jade powder 3, carclazyte 6, ground dolomite 3; Each raw material mixes by preparation method, is heated to 2600-2900 DEG C to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.

The present invention containing the mechanical property of antimony roll alloy steel material is: tensile strength 1079MPa, yield strength 934MPa, unit elongation 15%, relative reduction in area 23%, impact absorbing energy 55J, impelling strength 66J/cm2, hardness 291HB.

Claims

1., containing an antimony roll alloy steel material, it is characterized in that: the chemical element composition that it contains and mass percent thereof are: carbon 0.8-0.9, tungsten 2.0-2.3, molybdenum 0.4-0.7, vanadium 1.5-2.5, chromium 3.8-4.2, niobium 0.05-0.10, lanthanum 0.05-0.10, cobalt 1.1-1.4, Ni1.0-1.5, antimony 0.07-0.09, P≤0.030, S≤0.030, surplus are iron;

The described production method containing antimony roll alloy steel material is

(1), the preparation pig iron and scrap iron are originated as ferrous substrate in 1:0.5-1 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) vanadium, chromium, Ni;

2) tungsten, niobium, cobalt;

3) other remaining components; The each batch of timed interval of dropping into element is 20-23 minute, stirs after feeding intake;

Described casting postheat treatment is: first by room temperature with 200-210 DEG C/h of ramp to 710-720 DEG C, insulation 40-50 minute, then with 200-210 DEG C/h of ramp to 930-940 DEG C, insulation 4-5 hour; 580-590 DEG C is cooled to again with 180-190 DEG C/h of speed, then with 220-230 DEG C/h of ramp to 720-730 DEG C, then be cooled to 220-230 DEG C with 180-190 DEG C/h of speed, insulation 3-4 hour; Again with 100-110 DEG C/h of ramp to 330-350 DEG C, insulation 40-50 minute, then with 100-110 DEG C/h of ramp to 510-520 DEG C, insulation 4-5 hour, takes out air cooling and get final product;