CN103436802A - Hot roll for rolling titanium plate and manufacturing method of hot roll - Google Patents

Hot roll for rolling titanium plate and manufacturing method of hot roll Download PDF

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Publication number
CN103436802A
CN103436802A CN2013103288317A CN201310328831A CN103436802A CN 103436802 A CN103436802 A CN 103436802A CN 2013103288317 A CN2013103288317 A CN 2013103288317A CN 201310328831 A CN201310328831 A CN 201310328831A CN 103436802 A CN103436802 A CN 103436802A
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Prior art keywords
hot roll
titanium plate
roll
refining
temper
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CN2013103288317A
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CN103436802B (en
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杨昱东
高新生
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Sinosteel Xingtai Machinery and Mill Roll Co Ltd
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Sinosteel Xingtai Machinery and Mill Roll Co Ltd
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Publication of CN103436802A publication Critical patent/CN103436802A/en
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Abstract

The invention discloses a hot roll for rolling a titanium plate, and a manufacturing method of the hot roll. The hot roll comprises the following chemical constituents in percentage by weight: 0.30-0.50% of C, 0.60-2.00% of Si, 0.20-1.00% of Mn, 4.50-6.00% of Cr, 0.05-0.65% of Ni, 1.00-2.00% of Mo, 0.50-1.50% of V, less than or equal to 0.025% of P, less than or equal to 0.020% of S, and the balance of Fe and unavoidable impurities. The manufacturing method of the hot roll for rolling the titanium plate comprises the processing steps of steel ingot refining, roll blank forging, thermal refining, induction quenching treatment, tempering treatment and the like. Compared with the traditional hot roll made of a Cr3 material, the hot roll is good in abrasive resistance, corrosion resistance and thermal crack resistance, and the service life of the hot roll can be prolonged by above 70%.

Description

Hot roll and manufacture method thereof that rolling titanium plate is used
Technical field
The present invention relates to a kind of roll and manufacture method thereof, a kind of rolling titanium plate is used specifically hot roll and manufacture method thereof.
Background technology
Titanium has a series of excellent specific properties, is widely used in the fields such as space flight, aviation, chemical industry, oil, metallurgy, light industry, electric power, sea water desaltination, naval vessels and daily life utensil.The titanium plate has high-strength low-density, good mechanical property, the characteristics such as toughness and corrosion resistance are good.Along with China's economy develops rapidly, more and more many to the demand of titanium and alloy thereof, also more and more higher to surface quality and the dimension precision requirement of titanium plate, the performance requriements of the hot roll of therefore using for rolling titanium plate is also more and more higher.
The material of the current hot roll that is used for rolling titanium plate has part Cr2 material, main material is Cr3 series material, along with the raising to titanium plate specification of quality, 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) hot roll of this serial material manufacture wears no resistance, roughness retaining capability is poor, the roll change cycle is short, change frequently the production efficiency that hot roll has seriously restricted rolling equipment, increased the weight of workman's labour intensity, wearing and tearing due to hot roll simultaneously make the roll shape hold facility poor, and the titanium plate template that causes rolling to obtain and dimensional precision are difficult to guarantee, quality product decline;
(2) in the operation of rolling, because hot roll is iron and steel material quality, different from the electropotential of titanium plate, so the process systems that hot roll, titanium plate and Rolling Lubricant form has also just become a chemical primary cell system.In the Rolling Production process, hot roll stands galvanic corrosion under the rolling stress condition and the stress fatigue effect under etching condition simultaneously, and body surface is easy to occur thermal crack, and lower machine stock removal is large, has further aggravated the roller consumption, has shortened roll campaign;
(3) thermal crack on hot roll surface is easy to print on titanium plate sheet material, causes the plate face of titanium plate of poor quality, and scrap rate is high.
Therefore, along with the increase to titanium plate demand, the hot roll of need be a kind of new excellent performance.
Summary of the invention
The purpose of this invention is to provide hot roll and manufacture method thereof that a kind of rolling titanium plate is used, this hot roll has high-wearing feature, high roughness retaining capability and good solidity to corrosion.
For reaching above-mentioned performance requriements, the technical solution adopted in the present invention is:
The hot roll that rolling titanium plate is used, chemical composition in described hot roll and weight percentage are: C0.30~0.50%, Si0.60~2.00%, Mn0.20~1.00%, Cr4.50~6.00%, Ni0.05~0.65%, Mo1.00~2.00%, V0.50~1.50%, P≤0.025%, S≤0.020%, all the other are Fe and inevitable impurity.
Further improvement of the present invention is: the manufacture method of the hot roll that described rolling titanium plate is used comprises following processing step:
A, refining steel ingot: be smelted into molten steel will produce desired raw material in electric arc furnace, molten steel be placed in to the LF refining furnace and complete refining,
After liquid steel refining completes, be molded into the electrode ingot, utilize afterwards the electro-slag re-melting method founding to become steel ingot;
B, forging roller stock: steel ingot, after the forging process such as insulation, jumping-up and pulling are made forging stock, is carried out to anneal, and 620~720 ℃ of annealing temperatures, obtain roller stock by turning roughing afterwards;
C, modifier treatment: the roller stock that step B is obtained carries out modifier treatment: quenching temperature is 900~960 ℃, carries out afterwards temper, and tempering temperature is 500~550 ℃;
D, induction quenching are processed: roller stock is carried out to the surface induction hardening processing, and the heat-up rate while quenching heating is 100~200 ℃/min, and final Heating temperature is 1000~1050 ℃;
E, temper: the roller stock that will complete the surface induction hardening processing carries out temper, and tempering temperature is 520~650 ℃, and soaking time is 50~80h;
After temper completes, according to the size that requires of hot roll, roller stock is carried out to precision work, obtain the hot roll finished product, finished product is carried out to ultrasound examination, hardness test, microstructure examination.
Owing to having adopted technique scheme, the obtained technical progress of the present invention is:
In the material composition of hot roll of the present invention, Cr can increase the depth of hardening zone of hot roll, has improved hot roll intensity and wear resistance, has reduced the tensile stress that thermal shocking causes, and can not make steel become fragile.Si can improve the thermal shocking drag of material and improve hardening capacity, can also improve the temper resistance of steel; 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, increases the content heat-resistant cracking when Mo content is high and reduces on the contrary; V is the element that contributes to improve the wearability carbide most, and tissue and crystal grain that can the refinement steel increase the temper resistance of steel after quenching.Add Cr, the Ni composition as erosion resistance, improved the solidity to corrosion of hot roll, reduced in the operation of rolling galvanic corrosion to hot roll.
Modifier treatment has guaranteed the overall flexibility of hot roll.Hot roll is carried out to surface induction hardening thermal treatment, rate of heating is that per minute raises 100~200 ℃, and quenching temperature is 1000~1050 ℃, higher than the quenching temperature of common material, control speed of cooling and translational speed, reduced the unrelieved stress produced after the quenching process.Pass through the generation probability of temper decrease thermal crack after quench treatment, and then promote anti-accident ability, extend the life cycle of hot roll.
The present invention has improved alloy Cr content, adjusted the content of the alloying elements such as Si, Mo, V, and by specific heat treatment mode, refinement the crystal grain of steel, guarantee the interior tissue even compact of hot roll, strengthened the solidity to corrosion of hot roll, guaranteed that hot roll has high roughness retaining capability and hot-cracking resistance.The hot roll that adopts material of the present invention and performance to make, have high roughness retaining capability and hot-cracking resistance, under same working conditions, has high abrasion and hot-cracking resistance.With the hot roll that traditional C r3 material is made, compare, wear resistance is good, and solidity to corrosion is strong, and heat crack resistance is strong, and can improve more than 70% the work-ing life of hot roll.
Embodiment
The hot roll that rolling titanium plate is used, the chemical composition in described hot roll and weight percentage are: C0.30~0.50%, Si0.60~2.00%, Mn0.20~1.00%, Cr4.50~6.00%, Ni0.05~0.65%, Mo1.00~2.00%, V0.50~1.50%, P≤0.025%, S≤0.020%; All the other are Fe and inevitable impurity.
Chemical composition and the weight percentage thereof of the hot roll that the rolling titanium plate is used are preferably: C0.35~0.45%, Si0.80~1.50%, Mn0.60~0.80%, Cr4.80~5.50%, Ni0.25~0.50%, Mo1.20~1.50%, V0.70~1.00%, P≤0.020%, S≤0.015%; All the other are Fe and inevitable impurity.
Below in conjunction with embodiment, the present invention is described in further details:
Embodiment 1
The hot roll that rolling titanium plate is used, chemical composition in described hot roll and the design objective of weight percentage are: C0.30~0.35%, Si0.80~0.90%, Mn0.70~0.80%, Cr4.50~5.00%, Ni0.35~0.45%, Mo1.40~1.50%, V0.80~0.90%, P≤0.025%, S≤0.020%; All the other are Fe and inevitable impurity.
The manufacture method of described hot rolling titanium working roll comprises following processing step:
A, refining steel ingot: according to above-mentioned chemical composition and weight percentage thereof, prepare raw materials for production, carrying out preliminary melting in electric arc furnace is molten steel, at the LF refining furnace, molten steel is carried out to refining, vacuum stripping after melting completes, the electrode ingot is poured into a mould, is molded into to the molten steel after refining;
After the electrode ingot obtained is carried out to anneal, utilize electro-slag re-melting method that the founding of electrode ingot is become to steel ingot.
Through the steel ingot obtained is carried out to chemical composition analysis, the chemical composition in steel ingot and weight percentage are: C0.35%, Si0.90%, Mn0.80%, Cr5.00%, Ni0.35%, Mo1.50%, V0.90%, P0.025%, S0.02%.
B, forging roller stock: the heating steel ingot is forged, and through production processes such as insulation, jumping-up and pullings, forges and makes forging stock, is heated to be 1230~1300 ℃ in forging process, and forging ratio is not less than 2.5;
Forging stock is carried out to the forging rear annealing processing, and 620~720 ℃ of annealing temperatures, finally carry out turning roughing, makes roller stock.
C, modifier treatment: the roller stock that step B is obtained carries out modifier treatment: the Heating temperature of quench treatment is 900~960 ℃, water-cooled cooling after quenching; Carry out afterwards temper, tempering temperature is 500~550 ℃.
D, induction quenching are processed: adopt double frequency or line-frequency induction circle induction heating mode to carry out the surface induction hardening processing to roller stock, the heat-up rate while quenching heating is 100~200 ℃/min, and outlet temperature is 1000~1050 ℃, and water spray cools afterwards.
E, temper: the roller stock that will complete the surface induction hardening processing carries out temper, and tempering temperature is 520~650 ℃, and soaking time is 50~80h, and air cooling is to room temperature afterwards.
After temper completes, according to the size that requires of hot roll, roller stock is carried out to precision work, obtain the hot roll finished product, finished product is carried out to ultrasound examination, hardness test, microstructure examination.
By special-purpose roll Shore scleroscope, measure, the surface hardness that records the Heat Working Rolls of the present embodiment is 72~75HSD.The hot roll that the present embodiment is produced, metallographic structure and metallurgical performance are good, and under equal rolling temperature and rolling load, the corrosion resistance nature of hot roll improves, and the probability that produces thermal crack reduces by 80%, and roll campaign has improved more than 80%.
Embodiment 2
In embodiment 2, processing step is in the same manner as in Example 1, with the difference of embodiment 1, is:
The chemical composition of hot roll described in the present embodiment and the design objective of weight percentage thereof are: C0.40~0.45%, Si0.60~0.70%, Mn0.90~1.00%, Cr4.50~5.00%, Ni0.05~0.10%, Mo1.60~2.00%, V0.50~0.60%, P≤0.025%, S≤0.020%; All the other are Fe and inevitable impurity.
The steel ingot that steps A is obtained carries out chemical composition analysis, and the chemical composition in the steel ingot obtained and weight percentage thereof are: C0.45%, Si0.60%, Mn1.00%, Cr4.50%, Ni0.05%, Mo2.00%, V0.50%, P0.019%, S0.015%.
By special-purpose roll Shore scleroscope, measure, the surface hardness that records the Heat Working Rolls of the present embodiment is 73~75HSD.The hot roll that the present embodiment is produced, metallographic structure and metallurgical performance are good, and under equal rolling temperature and rolling load, the corrosion resistance nature of hot roll improves, and the probability that produces thermal crack reduces by 80%, and roll campaign has improved more than 80%.
Embodiment 3
In embodiment 3, processing step is in the same manner as in Example 1, with the difference of embodiment 1, is:
The chemical composition of hot roll described in the present embodiment and the design objective of weight percentage thereof are: C0.30~0.35%, Si0.80~0.90%, Mn0.60~0.70%, Cr4.80~5.50%, Ni0.55~0.65%, Mo1.00~1.10%, V0.60~0.70%, P≤0.020%, S≤0.010%; All the other are Fe and inevitable impurity.
The steel ingot that steps A is obtained carries out chemical composition analysis, and the chemical composition in the steel ingot obtained and weight percentage thereof are: C0.30%, Si0.80%, Mn0.60%, Cr5.50%, Ni0.65%, Mo1.00%, V0.70%, P0.017%, S0.007%.
By special-purpose roll Shore scleroscope, measure, the surface hardness that records the Heat Working Rolls of the present embodiment is 72~74HSD.The hot roll that the present embodiment is produced, metallographic structure and metallurgical performance are good, and under equal rolling temperature and rolling load, the corrosion resistance nature of hot roll improves, and the probability that produces thermal crack reduces by 75%, and roll campaign has improved more than 75%.
Embodiment 4
In embodiment 4, processing step is in the same manner as in Example 1, with the difference of embodiment 1, is:
The chemical composition of hot roll described in the present embodiment and the design objective of weight percentage thereof are: C0.30~0.40%, Si1.80~2.00%, Mn0.70~0.80%, Cr4.50~5.00%, Ni0.25~0.30%, Mo1.10~1.20%, V1.30~1.50%, P≤0.020%, S≤0.015%; All the other are Fe and inevitable impurity.
The steel ingot that steps A is obtained carries out chemical composition analysis, and the chemical composition in the steel ingot obtained and weight percentage thereof are: C0.40%, Si2.00%, Mn0.70%, Cr4.80%, Ni0.25%, Mo1.20%, V1.50%, P0.015%, S0.011%.
By special-purpose roll Shore scleroscope, measure, the surface hardness that records the Heat Working Rolls of the present embodiment is 71~73HSD.The hot roll that the present embodiment is produced, metallographic structure and metallurgical performance are good, and under equal rolling temperature and rolling load, the corrosion resistance nature of hot roll improves, and the probability that produces thermal crack reduces by 70%, and roll campaign has improved more than 70%.
Embodiment 5
In embodiment 4, processing step is in the same manner as in Example 1, with the difference of embodiment 1, is:
The chemical composition of hot roll described in the present embodiment and the design objective of weight percentage thereof are: C0.40~0.50%, Si1.40~1.50%, Mn0.20~0.30%, Cr5.50~6.00%, Ni0.45~0.50%, Mo1.40~1.45%, V0.90~1.00%, P≤0.020%, S≤0.015%; All the other are Fe and inevitable impurity.
The steel ingot that steps A is obtained carries out chemical composition analysis, and the chemical composition in the steel ingot obtained and weight percentage thereof are: C0.50%, Si1.50%, Mn0.20%, Cr6.00%, Ni0.50%, Mo1.45%, V1.00%, P0.02%, S0.009%.
By special-purpose roll Shore scleroscope, measure, the surface hardness that records the Heat Working Rolls of the present embodiment is 70~72HSD.The hot roll that the present embodiment is produced, metallographic structure and metallurgical performance are good, and under equal rolling temperature and rolling load, the corrosion resistance nature of hot roll improves, and the probability that produces thermal crack reduces by 70%, and roll campaign has improved more than 70%.

Claims (2)

1. the hot roll that rolling titanium plate is used, it is characterized in that chemical composition and weight percentage in described hot roll are: C0.30~0.50%, Si0.60~2.00%, Mn0.20~1.00%, Cr4.50~6.00%, Ni0.05~0.65%, Mo1.00~2.00%, V0.50~1.50%, P≤0.025%, S≤0.020%, all the other are Fe and inevitable impurity.
2. the manufacture method of the hot roll that rolling titanium plate claimed in claim 1 is used is characterized in that comprising following processing step:
A, refining steel ingot: be smelted into molten steel will produce desired raw material in electric arc furnace, molten steel be placed in to the LF refining furnace and complete refining,
After liquid steel refining completes, be molded into the electrode ingot, utilize afterwards the electro-slag re-melting method founding to become steel ingot;
B, forging roller stock: steel ingot, after the forging process such as insulation, jumping-up and pulling are made forging stock, is carried out to anneal, and 620~720 ℃ of annealing temperatures, obtain roller stock by turning roughing afterwards;
C, modifier treatment: the roller stock that step B is obtained carries out modifier treatment: quenching temperature is 900~960 ℃, carries out afterwards temper, and tempering temperature is 500~550 ℃;
D, induction quenching are processed: roller stock is carried out to the surface induction hardening processing, and the heat-up rate while quenching heating is 100~200 ℃/min, and final Heating temperature is 1000~1050 ℃;
E, temper: the roller stock that will complete the surface induction hardening processing carries out temper, and tempering temperature is 520~650 ℃, and soaking time is 50~80h;
After temper completes, according to the size that requires of hot roll, roller stock is carried out to precision work, obtain the hot roll finished product, finished product is carried out to ultrasound examination, hardness test, microstructure examination.
CN201310328831.7A 2013-07-31 2013-07-31 The hot roll of rolling titanium plate and manufacture method thereof Active CN103436802B (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN104099528A (en) * 2014-07-08 2014-10-15 宁波市鄞州文昌金属制品有限公司 Special-shaped roller and preparation method thereof
CN105349746A (en) * 2015-11-10 2016-02-24 铜陵市明诚铸造有限责任公司 Thermal treatment process of cast steel roll
CN105648349A (en) * 2016-04-11 2016-06-08 重庆钢铁(集团)有限责任公司 Preparation method of medium-thickness plate hot straightening roll
CN106282771A (en) * 2016-08-30 2017-01-04 江苏共昌轧辊股份有限公司 A kind of hot rolling cogging high alloy tool steel roll and preparation method
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
CN111347220A (en) * 2018-12-24 2020-06-30 溧阳市金昆锻压有限公司 Manufacturing method of ledeburite steel high-wear-resistance press roll shell
CN112795853A (en) * 2020-12-16 2021-05-14 中钢集团邢台机械轧辊有限公司 Manufacturing method of equal-hardness Cr5 supporting roll

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CN101880834A (en) * 2010-07-27 2010-11-10 中钢集团邢台机械轧辊有限公司 Cold roll with high abrasive resistance and high roughness retaining capability and manufacturing method thereof
CN101974723A (en) * 2010-09-26 2011-02-16 中钢集团邢台机械轧辊有限公司 Impact-resistance double-roller roughing roll and manufacturing method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101880834A (en) * 2010-07-27 2010-11-10 中钢集团邢台机械轧辊有限公司 Cold roll with high abrasive resistance and high roughness retaining capability and manufacturing method thereof
CN101974723A (en) * 2010-09-26 2011-02-16 中钢集团邢台机械轧辊有限公司 Impact-resistance double-roller roughing roll and manufacturing method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104099528A (en) * 2014-07-08 2014-10-15 宁波市鄞州文昌金属制品有限公司 Special-shaped roller and preparation method thereof
CN105349746A (en) * 2015-11-10 2016-02-24 铜陵市明诚铸造有限责任公司 Thermal treatment process of cast steel roll
CN105648349A (en) * 2016-04-11 2016-06-08 重庆钢铁(集团)有限责任公司 Preparation method of medium-thickness plate hot straightening roll
CN105648349B (en) * 2016-04-11 2017-07-07 重庆钢铁(集团)有限责任公司 A kind of preparation method of cut deal hot straightening roll
CN106282771A (en) * 2016-08-30 2017-01-04 江苏共昌轧辊股份有限公司 A kind of hot rolling cogging high alloy tool steel roll and preparation method
CN111347220A (en) * 2018-12-24 2020-06-30 溧阳市金昆锻压有限公司 Manufacturing method of ledeburite steel high-wear-resistance press roll shell
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
CN112795853A (en) * 2020-12-16 2021-05-14 中钢集团邢台机械轧辊有限公司 Manufacturing method of equal-hardness Cr5 supporting roll

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