CN103409696A - Hot rolling roller for rolling nonferrous metal, and manufacturing method thereof - Google Patents
Hot rolling roller for rolling nonferrous metal, and manufacturing method thereof Download PDFInfo
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Abstract
The present invention discloses a hot rolling roller for rolling a nonferrous metal, and a manufacturing method thereof. Chemical components of the roller comprise, by weight, 0.50-0.80% of C, 0.30-1.20% of Si, 0.20-1.00% of Mn, less than or equal to 0.025% of P, less than or equal to 0.020% of S, 4.50-6.00% of Cr, 0.20-0.80% of Ni, 0.20-1.00% of Mo, 0.10-0.50% of V, and the balance of Fe and unavoidable impurities. The manufacturing method of the roller comprises the following process steps: a, refining a steel ingot; b, forging a roller blank; c, carrying out quenching and tempering, and carrying out mechanical processing; d, carrying out a quenching heat treatment; and e, carrying out a tempering treatment. The hot rolling roller has characteristics of high wear resistance, good thermal cracking resistance and good electrochemical corrosion resistance, and a service life of the hot rolling roller can be increased by more than 50% compared with the ordinary Cr3 roller.
Description
Technical field
The present invention relates to a kind of roll and manufacture method thereof, specifically, is a kind of hot roll and manufacture method thereof of rolling non-ferrous metal.
Background technology
Roll is the strength member on Steel Mill's rolling mill, is the important consumable part that determines milling train efficiency and mill bar quality.The pressure that roll produces while utilizing a pair of or one group of roll rolling rolls the rolloff part, makes rolled piece produce viscous deformation and obtain desirable design shape, and therefore, the quality of roll quality is directly connected to the surface quality of rolled products and the production operational availability of rolling mill.Dynamic And Static Loads when it mainly bears rolling, the impact of wearing and tearing and temperature variation.
According to the difference of working order, roll is divided into cold roll and hot roll usually.Wherein, hot roll uses usually in the processing such as cogging, slab, shaped steel.In course of hot rolling, roll has born powerful rolling load, violent wearing and tearing and the impact of thermal fatigue, and hot roll is at high temperature worked, the temperature of rolled material may be up to more than 1000 ℃ or 1000 ℃, so manufacture the material of roll, must have enough hardness to resistance to wear, have enough intensity to keep its size shape, also must have simultaneously enough toughness with heat shock resistance and prevent hot tearing.
Along with China's economy develops rapidly, from aerospace to the daily electrical home appliance, demand to the non-ferrous metal such as aluminium, copper, titanium, molybdenum and alloy thereof is more and more many, and more and more higher to plate surface quality and accuracy requirement, therefore to the roll of rolling non-ferrous metal, requires also more and more higher.At present, the main material of the domestic hot roll that is used for the rolling non-ferrous metal is Cr3 series material, and still, the hot roll of this type of material can not have been met the need of market and the requirement of product surface high quality, reason comprise following some:
(1) roll of Cr3 series material manufacture wears no resistance, and the roll change cycle is short; According to statistics, this type of non-ferrous metal hot roll may just lose efficacy after the metallic rod material of 600 tons of left and right of continuous rolling, frequent replacing roll has seriously restricted the production efficiency of equipment for continuously rolling, has strengthened workman's labour intensity, and makes the production cost of product high; Simultaneously, due to the wearing and tearing of roll, make the roll shape hold facility poor, the board dimension precision rolled out and template are difficult to guarantee, quality product decline;
(2) in the operation of rolling, because roll is ferrous materials, different from the electropotential of nonferrous materials, so the process systems that roll, non-ferrous metal and Rolling Lubricant form has also just become a chemical primary cell system, in the operation of rolling, roll stands galvanic corrosion under the rolling stress condition and the stress fatigue effect under etching condition simultaneously, body surface is easy to occur thermal crack, lower machine stock removal is large, has further aggravated the roller consumption, has shortened roll campaign;
(3) after thermal crack appears in roller surface, during rolling, be easy to print on non-ferrous metal plate, cause the plate face of institute's rolled metal plate second-rate, a large amount of waste products even occur.
Therefore, along with the continuous increase of the demand to non-ferrous metal and alloy thereof and accuracy requirement thereof, the roll of researching and developing new excellent performance has very important significance.
Summary of the invention
The hot roll and the manufacture method thereof that the purpose of this invention is to provide a kind of rolling non-ferrous metal, this roll have high-wearing feature, good hot-cracking resistance and electrochemical corrosion resistant performance.
For reaching above-mentioned performance requriements, the technical solution adopted in the present invention is:
The hot roll of rolling non-ferrous metal, its chemical composition and weight percentage thereof are:
C, 0.50～0.80%; Si, 0.30～1.20%; Mn, 0.20～1.00%; P≤0.025%; S≤0.020%; Cr, 4.50～6.00%; Ni, 0.20～0.80%; Mo, 0.20～1.00%; V, 0.10～0.50%; All the other are Fe and inevitable impurity.
The manufacture method of the hot roll of rolling non-ferrous metal comprises following processing step:
(a) refining steel ingot: according to above-mentioned chemical composition and content preparation steel raw material thereof, in electric arc furnace, carry out preliminary melting, after melting completes, molten steel is placed in to the LF refining furnace molten steel is carried out to refining, refining temperature is 1590 ℃～1610 ℃; After each alloying element and H, O, N gas content are suitable, adjust the temperature to 1530 ℃～1550 ℃ tappings, adopt the die casting form to pour into steel ingot, after the demoulding, steel ingot is carried out to anneal;
(b) forge roller stock: heating steel ingot to 1230 ℃～1300 ℃, soaking time 8h; Then according to forging ratio, be not less than 2.5 and be forged into roller, and roller stock is heat-treated with turning and processed;
(c) modified and mechanical workout: the roller stock that step (b) is obtained carries out rough turn and modifier treatment; 940 ℃～960 ℃ of the quenching temperatures of described modifier treatment, cool time 10h, 500 ℃～540 ℃ of tempering temperatures, tempering time 18h; After modifier treatment, finish turning hot roll working face is to specified dimension;
(d) quenching heat treatment: the hot roll working-surface is carried out to double frequency induction, and quenching temperature is 950 ℃～1000 ℃, and the type of cooling is cooling for water spray;
(e) temper: hot roll is carried out to temper, and tempering temperature is 400 ℃～450 ℃, and tempering insulation time is 40h～100h, and then air cooling is to room temperature; After tempering completes, according to desired size, each position of hot roll is carried out to precision work again.
Further improvement of the present invention is: 800 ℃ of the annealing temperatures in described step (a), annealing time 35h.
Further improvement of the present invention is: in described step (b), carry out anneal after having forged, the anneal temperature is 680 ℃～700 ℃, soaking time 33h.
Owing to having adopted technique scheme, the obtained technical progress of the present invention is:
The invention provides a kind of hot roll of rolling non-ferrous metal, have high-wearing feature, good hot-cracking resistance and electrochemical corrosion resistant performance.Through production test, prove, under hot-rolled condition, the wear resisting property of non-ferrous metal hot roll and hot-cracking resistance all obviously improve, roll is not yielding when rolling, improve roll campaign, reduced the roll replacement frequency, improved the production efficiency of equipment for continuously rolling, thereby greatly reduce production cost, more guaranteed the rolling quality of non-ferrous metal.Under identical rolling condition, with common Cr3 material roll, to compare, the hot roll life-span of the present invention can improve more than 50%.
In the chemical composition of hot roll of the present invention, Cr is one of matrix composition of roll, can increase the depth of hardening zone of roll and the secondary hardening effect is arranged, and has improved roll strength and wear resistance, reduces the tensile stress that thermal shocking causes, and steel is become fragile; Therefore, by improving the content of Cr, strengthen the intensity of roll, hindered the formation and development of crackle.In addition, C affects bulk strength and the quenching hardness of steel; Si can improve the thermal shocking drag of material and improve hardening capacity, can also improve the temper resistance of steel; Mn is a kind of reductor, for impurity S is fixed; The increase of Ni content can improve roll hardening capacity, prevents crack propagation; The heat-resistant cracking of Mo content and roll working lining can have certain relation, and Mo content increases content when low can improve heat-resistant cracking, when Mo content is high, increases the content heat-resistant cracking and reduces on the contrary; V is the element that helps to improve the wearability carbide most, and tissue and crystal grain that can the refinement steel increase the temper resistance of hardened steel.The hot roll of rolling non-ferrous metal of the present invention, content by suitable raising Cr, adjust the relative content of C, Si, Mn, Ni, all the other alloying elements such as Mo, V, and by specific heat treatment mode, guaranteed that the non-ferrous metal hot roll has high-wearing feature, good hot-cracking resistance and electrochemical corrosion resistant performance, has extended the work-ing life of roll greatly.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details:
The hot roll of rolling non-ferrous metal, its chemical composition and weight percentage thereof are:
C, 0.50～0.80%; Si, 0.30～1.20%; Mn, 0.20～1.00%; P≤0.025%; S≤0.020%; Cr, 4.50～6.00%; Ni, 0.20～0.80%; Mo, 0.20～1.00%; V, 0.10～0.50%; All the other are Fe and inevitable impurity.
Chemical composition and the weight percentage thereof of above-mentioned non-ferrous metal hot roll are preferably:
C, 0.60～0.75%; Si, 0.50～0.85%; Mn, 0.65～0.75%; P≤0.020%; S≤0.016%; Cr, 4.95～5.15%; Ni, 0.20～0.50%; Mo, 0.65～0.90%; V, 0.25～0.40%; All the other are Fe and inevitable impurity.
The manufacture method of the hot roll of rolling non-ferrous metal comprises following processing step:
(a) refining steel ingot: according to above-mentioned chemical composition and content preparation steel raw material thereof, in electric arc furnace, carry out preliminary melting, after melting completes, molten steel is placed in to the LF refining furnace molten steel is carried out to refining, refining temperature is 1590 ℃～1610 ℃; After each alloying element and H, O, N gas content are suitable, adjust the temperature to 1530 ℃～1550 ℃ tappings, adopt the die casting form to pour into steel ingot, after the demoulding, steel ingot is carried out to anneal;
(b) forge roller stock: heating steel ingot to 1230 ℃～1300 ℃, soaking time 8h; Then according to forging ratio, be not less than 2.5 and be forged into roller, and roller stock is heat-treated with turning and processed;
(c) modified and mechanical workout: the roller stock that step (b) is obtained carries out rough turn and modifier treatment; 940 ℃～960 ℃ of the quenching temperatures of described modifier treatment, cool time 10h, 500 ℃～540 ℃ of tempering temperatures, tempering time 18h; After modifier treatment, finish turning hot roll working face is to specified dimension;
(d) quenching heat treatment: the hot roll working-surface is carried out to double frequency induction, and quenching temperature is 950 ℃～1000 ℃, and the type of cooling is cooling for water spray;
(e) temper: hot roll is carried out to temper, and tempering temperature is 400 ℃～450 ℃, and tempering insulation time is 40h～100h, and then air cooling is to room temperature; After tempering completes, according to desired size, each position of hot roll is carried out to precision work again.
Embodiment 1
One, the design objective of the chemical composition content (weight percentage) of the hot roll of the present embodiment is:
C, 0.50～0.60%; Si, 0.30～0.40%; Mn, 0.9～1.0%; P≤0.02%; S≤0.02%; Cr, 5.5～6.0%; Ni, 0.20～0.40%; Mo, 0.60～0.80%; V, 0.10～0.20%; All the other are Fe and inevitable impurity.
Two, the manufacture method of the hot roll of a kind of rolling non-ferrous metal of the present embodiment is:
(a) refining steel ingot: according to above-mentioned chemical composition and content preparation steel raw material thereof, in electric arc furnace, carry out preliminary melting, temperature of fusion is greater than 1640 ℃; After melting completes, molten steel is placed in to the LF refining furnace molten steel is carried out to refining, refining temperature is 1590 ℃～1610 ℃; After each alloying element and H, O, N gas content are suitable, adjust the temperature to 1530 ℃～1550 ℃ tappings, adopt the die casting form to pour into steel ingot, after the demoulding, steel ingot is carried out to anneal, 800 ℃ of annealing temperatures, annealing time 35h; Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is: C, 0.50%; Si, 0.30%; Mn, 1.0%; P, 0.015%; S, 0.015%; Cr, 6.0%; Ni, 0.20%; Mo, 0.70%; V, 0.10%; All the other are Fe and inevitable impurity.
(b) forge roller stock: heating steel ingot to 1230 ℃～1300 ℃ is incubated 8 hours; Then use water pressure engine, according to forging ratio, be not less than 2.5 and be forged into roller, then roller stock is carried out to anneal, 680 ℃～700 ℃ of annealing temperatures, heat treatment time 33 hours, finally carry out turning processing;
(c) modified and mechanical workout: the roller stock that step (b) is obtained carries out rough turn and modifier treatment; 940 ℃～960 ℃ of the quenching temperatures of described modifier treatment, cool time 10h, 500 ℃～540 ℃ of tempering temperatures, tempering time 18h; After modifier treatment, finish turning hot roll working face is to specified dimension;
(d) quenching heat treatment: the hot roll working-surface is carried out to double frequency induction, and quenching temperature is 960 ℃, and the type of cooling is cooling for water spray;
(e) temper: hot roll is carried out to temper, and tempering temperature is 430 ℃, and tempering insulation time is 60h, and then air cooling is to room temperature; After tempering completes, by desired size, each position of hot roll is carried out to precision work again, namely make the hot roll of rolling non-ferrous metal.
Embodiment 2
The preparation method of embodiment 2 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 2 is:
C, 0.60～0.70%; Si, 0.50～0.60%; Mn, 0.20～0.30%; P≤0.020%; S≤0.015%; Cr, 4.50～5.00%; Ni, 0.50～0.80%; Mo, 0.80～1.00%; V, 0.30～0.50%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is:
C, 0.63%; Si, 0.50%; Mn, 0.20%; P, 0.019%; S, 0.011%; Cr, 4.50%; Ni, 0.80%; Mo, 0.84%; V, 0.34%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 970 ℃; Tempering temperature in step (e) is 450 ℃, tempering time 50h.
Embodiment 3
The preparation method of embodiment 3 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 3 is:
C, 0.70～0.80%; Si, 1.00～1.20%; Mn, 0.50～0.70%; P≤0.018%; S≤0.020%; Cr, 5.00～5.50%; Ni, 0.30～0.50%; Mo, 0.80～1.00%; V, 0.40～0.50%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is:
C, 0.72%; Si, 1.2%; Mn, 0.68%; P, 0.017%; S, 0.020%; Cr, 5.30%; Ni, 0.35%; Mo, 1.00%; V, 0.41%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 950 ℃; Tempering temperature in step (e) is 400 ℃, tempering time 70h.
Embodiment 4
The preparation method of embodiment 4 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 4 is:
C, 0.70～0.80%; Si, 0.70～0.90%; Mn, 0.75～0.85%; P≤0.025%; S≤0.010%; Cr, 5.00～5.50%; Ni, 0.40～0.60%; Mo, 0.20～0.50%; V, 0.40～0.50%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is:
C, 0.80%; Si, 0.72%; Mn, 0.76%; P, 0.025%; S, 0.009%; Cr, 5.04%; Ni, 0.48%; Mo, 0.20%; V, 0.50%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 1000 ℃; Tempering temperature in step (e) is 435 ℃, tempering time 100h.
Embodiment 5
The preparation method of embodiment 5 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 5 is:
C, 0.50～0.65%; Si, 0.60～0.70%; Mn, 0.65～0.75%; P≤0.020%; S≤0.020%; Cr, 5.10～5.80%; Ni, 0.20～0.30%; Mo, 0.50～0.80%; V, 0.20～0.30%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the final chemical composition content (weight percentage) of steel ingot is:
C, 0.60%; Si, 0.65%; Mn, 0.73%; P, 0.018%; S, 0.016%; Cr, 5.15%; Ni, 0.21%; Mo, 0.70%; V, 0.24%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 960 ℃; Tempering temperature in step (e) is 410 ℃, tempering time 60h.
Embodiment 6
The preparation method of embodiment 6 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 6 is:
C, 0.60～0.80%; Si, 0.40～0.60%; Mn, 0.30～0.65%; P≤0.020%; S≤0.015%; Cr, 4.95～5.05%; Ni, 0.25～0.35%; Mo, 0.75～0.95%; V, 0.30～0.50%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is:
C, 0.63%; Si, 0.50%; Mn, 0.63%; P, 0.019%; S, 0.011%; Cr, 4.95%; Ni, 0.27%; Mo, 0.84%; V, 0.34%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 970 ℃; Tempering temperature in step (e) is 440 ℃, tempering time 50h.
Embodiment 7
The preparation method of embodiment 7 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 7 is:
C, 0.70～0.75%; Si, 0.80～1.00%; Mn, 0.60～0.90%; P≤0.020%; S≤0.015%; Cr, 5.20～6.00%; Ni, 0.30～0.50%; Mo, 0.85～1.00%; V, 0.35～0.50%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is:
C, 0.72%; Si, 0.87%; Mn, 0.68%; P, 0.017%; S, 0.013%; Cr, 5.30%; Ni, 0.35%; Mo, 0.90%; V, 0.41%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 950 ℃; Tempering temperature in step (e) is 420 ℃, tempering time 70h.
Embodiment 8
The preparation method of embodiment 8 is identical with the preparation method of embodiment 1, and its difference is:
The design objective of the chemical composition content (weight percentage) of the hot roll of embodiment 8 is:
C, 0.60～0.75%; Si, 0.50～0.85%; Mn, 0.65～0.75%; P≤0.020%; S≤0.015%; Cr, 4.95～5.15%; Ni, 0.20～0.50%; Mo, 0.65～0.90%; V, 0.25～0.40%; All the other are Fe and inevitable impurity.
Through steel ingot is carried out to chemical composition analysis, the content of the final chemical composition of steel ingot (weight percentage) is:
C, 0.68%; Si, 0.72%; Mn, 0.75%; P, 0.020%; S, 0.009%; Cr, 5.04%; Ni, 0.48%; Mo, 0.68%; V, 0.29%; All the other are Fe and inevitable impurity.
The quenching temperature of step (d) is 990 ℃; Tempering temperature in step (e) is 435 ℃, tempering time 80h.
The hot roll of embodiment 1～embodiment 8 preparations is carried out to performance test, comprise surface hardness detection, cut resistance test and thermal fatigue test, and contrast with traditional Cr3 material roll, test data is in Table 1.
The hot roll the performance test results of table 1 rolling non-ferrous metal
| ? | Surface hardness (HSD) | Wearing coefficient | Crack depth (micron) |
| Common Cr3 material roll | 60～68 | 1.83 | 76.5 |
| Embodiment 1 | 73～75 | 3.21 | 31.2 |
| Embodiment 2 | 75～78 | 2.28 | 25.9 |
| Embodiment 3 | 80～82 | 3.19 | 27.6 |
| Embodiment 4 | 77～78 | 3.37 | 42.3 |
| Embodiment 5 | 81～83 | 3.16 | 33.5 |
| Embodiment 6 | 74～76 | 3.27 | 29.2 |
| Embodiment 7 | 78～79 | 3.32 | 26.5 |
| Embodiment 8 | 77～79 | 3.08 | 30.1 |
Wherein, surface hardness is to use special-purpose roll Shore scleroscope to detect; Surface hardness and wearing coefficient all are used for characterizing wear resistance, and surface hardness is larger, and wearing coefficient is larger, and wear resistance is better.Thermal fatigue test is adopting test samples crack depth under 600 ℃ of identical cold and hot tired revolution conditions of uniform temp, be used to characterizing hot-cracking resistance; Crack depth is more shallow, and hot-cracking resistance is better.
Comprehensive above-described embodiment and correlation results data can be found, with common Cr3 material roll, compare, the hot roll of rolling non-ferrous metal provided by the invention has significant high-performance, not only surface hardness and wearing coefficient obviously improve, and its crack depth is only half left and right of common Cr3 material roll, therefore, be greatly improved the work-ing life of non-ferrous metal roll, has great importance in non-ferrous metal rolling field.
Although the present invention has only enumerated the non-ferrous metal hot roll of above-mentioned 8 embodiment, but on the basis of above-described embodiment, by the weight percentage to its chemical composition, preferred weight percentage composition, further expand and revise, and be aided with tempering temperature and tempering insulation time in the quenching temperature in step (d), step (e) are suitably adjusted, all can reach purpose of the present invention.
Claims (4)
1. the hot roll of rolling non-ferrous metal, it is characterized in that: the chemical composition of described roll and weight percentage thereof are:
C, 0.50～0.80%; Si, 0.30～1.20%; Mn, 0.20～1.00%; P≤0.025%; S≤0.020%; Cr, 4.50～6.00%; Ni, 0.20～0.80%; Mo, 0.20～1.00%; V, 0.10～0.50%; All the other are Fe and inevitable impurity.
2. the manufacture method of the hot roll of a rolling non-ferrous metal claimed in claim 1 is characterized in that: comprise following processing step:
(a) refining steel ingot: according to above-mentioned chemical composition and content preparation steel raw material thereof, in electric arc furnace, carry out preliminary melting, after melting completes, molten steel is placed in to the LF refining furnace molten steel is carried out to refining, refining temperature is 1590 ℃～1610 ℃; After each alloying element and H, O, N gas content are suitable, adjust the temperature to 1530 ℃～1550 ℃ tappings, adopt the die casting form to pour into steel ingot, after the demoulding, steel ingot is carried out to anneal;
(b) forge roller stock: heating steel ingot to 1230 ℃～1300 ℃, soaking time 8h; Then according to forging ratio, be not less than 2.5 and be forged into roller, and roller stock is heat-treated with turning and processed;
(c) modified and mechanical workout: the roller stock that step (b) is obtained carries out rough turn and modifier treatment; 940 ℃～960 ℃ of the quenching temperatures of described modifier treatment, cool time 10h, 500 ℃～540 ℃ of tempering temperatures, tempering time 18h; After modifier treatment, finish turning hot roll working face is to specified dimension;
(d) quenching heat treatment: the hot roll working-surface is carried out to double frequency induction, and quenching temperature is 950 ℃～1000 ℃, and the type of cooling is cooling for water spray;
(e) temper: hot roll is carried out to temper, and tempering temperature is 400 ℃～450 ℃, and tempering insulation time is 40h～100h, and then air cooling is to room temperature; After tempering completes, according to desired size, each position of hot roll is carried out to precision work again.
3. the manufacture method of the hot roll of rolling non-ferrous metal according to claim 2, is characterized in that: 800 ℃ of the annealing temperatures in described step (a), annealing time 35h.
4. according to the manufacture method of the hot roll of claim 2 or the described rolling non-ferrous metal of 3 any one, it is characterized in that: in described step (b), after having forged, carry out anneal, the anneal temperature is 680 ℃～700 ℃, soaking time 33h.
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| CN110205542A (en) * | 2019-05-22 | 2019-09-06 | 山东钢铁股份有限公司 | A kind of cold roll tool steel and preparation method thereof |
| CN112238143A (en) * | 2019-07-16 | 2021-01-19 | Posco公司 | Heat pipe roller based on forging roller and manufacturing method thereof |
| CN110777294A (en) * | 2019-09-25 | 2020-02-11 | 中钢集团邢台机械轧辊有限公司 | Large-scale battery pole piece rolling mill working roll and preparation method thereof |
| CN110791707A (en) * | 2019-10-31 | 2020-02-14 | 宝钢轧辊科技有限责任公司 | High-hardness hot rough rolling working roll for rolling nonferrous metal and manufacturing method thereof |
| CN110791707B (en) * | 2019-10-31 | 2021-05-07 | 宝钢轧辊科技有限责任公司 | High-hardness hot rough rolling working roll for rolling nonferrous metal and manufacturing method thereof |
| CN112680657A (en) * | 2020-11-30 | 2021-04-20 | 中钢集团邢台机械轧辊有限公司 | Method for manufacturing non-ferrous hot-rolled semi-high-speed steel working roll |
| CN112680657B (en) * | 2020-11-30 | 2023-02-24 | 中钢集团邢台机械轧辊有限公司 | Method for manufacturing non-ferrous hot-rolled semi-high-speed steel working roll |
| CN112831718A (en) * | 2020-12-29 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Hot continuous rolling two-roller rough rolling working roller and preparation method thereof |
| CN114351049A (en) * | 2021-12-31 | 2022-04-15 | 中钢集团邢台机械轧辊有限公司 | Anti accident type forged steel backing roll |
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