WO2008061452A1 - Roller for welding pipe mill - Google Patents

Roller for welding pipe mill Download PDF

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Publication number
WO2008061452A1
WO2008061452A1 PCT/CN2007/003299 CN2007003299W WO2008061452A1 WO 2008061452 A1 WO2008061452 A1 WO 2008061452A1 CN 2007003299 W CN2007003299 W CN 2007003299W WO 2008061452 A1 WO2008061452 A1 WO 2008061452A1
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Prior art keywords
roll
steel
rolls
chromium
cast
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PCT/CN2007/003299
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French (fr)
Chinese (zh)
Inventor
Houzhi Yuan
Ning Zhang
Xingyi Liu
Ping Wang
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Houzhi Yuan
Ning Zhang
Xingyi Liu
Ping Wang
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Priority to CN200610104942.X priority Critical
Priority to CNB200610104942XA priority patent/CN100423858C/en
Application filed by Houzhi Yuan, Ning Zhang, Xingyi Liu, Ping Wang filed Critical Houzhi Yuan
Publication of WO2008061452A1 publication Critical patent/WO2008061452A1/en

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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/56Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/005Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten

Abstract

A high Cr casting iron or steel roller is applicable to a mill for rolling welded pipe. The composition of the high Cr casting iron roller contains (by wt%): 1.8-2.8% C, ≤1.0% Si, ≤1.0% Mn, ≤0.05% P, ≤0.05% S, 12-22% Cr, 0.5-3.0% Ni, 0.8-3.0% Mo, 0-0.3% Ti, 0-1.0% V, 0-1.0% Cu, 0.01-0.5% RE, and balance Fe. The composition of the high Cr casting iron roller contains (by wt%): 0.7-1.2% C, ≤1.0% Si, ≤1.0% Mn, ≤0.05% P, ≤0.05% S, 8-12% Cr, 0.5-2.0% Ni, 0.8-3.0% Mo, 0-0.3% Ti, 0-1.0% V, 0-0.8% W, 0.01-0.5% RE, and balance Fe. With the roller for welding pipe mill, as being producing by casting, the material organization of the roller is consistent throughout the roller, toughness and wear resistance are very high, thereby having a service life of 2-5 times more than a forged roller.

Description

一种焊接钢管轧机用轧辊 技术领域 本发明涉及一种管材礼机轧辊, 尤其涉及一种轧制坪接钢管用的铸 造轧辊, 该轧辊的材质为铸造高铬铁或铸造高铬钢。 背景技术 轧辊是坪接钢管轧机生产中消耗量最大的主要部件, 轧辊质量与寿 命的高低直接影响着焊接钢管的质量与生产效率。 轧辊直接接触轧件并 完成整个轧制过程。 在承受较大压应力的作用的同时, 还要承受滚动和 滑动摩擦, 有的还要受到激冷激热的影响, 所以磨损严重, 需要频繁更 换。 目前代表国际先进水平的焊接钢管轧机用轧辊有多种牌号, 如德国 厂商生产的 X165CrMoV12 或 X155CrMoV12 意大利厂商生产的 X165CrMoV12KU、美国厂商生产 D2和日本厂商生产的 SKD11、SKD61 的合金工具钢锻造轧辊。 国内如宝钢、 上海中油、 胜利油田等引进的焊 接钢管生产线, 使用的基本都是德国和日本厂商生产的合金工具钢锻造 轧辊。 国内较先进的焊接钢管轧机用轧辊采用的材质是接近于上述国外 牌号的 Cr12MoV冷作模具钢,使用这种钢对材质纯净度要求较高、锻造 和热处理难度都很大, 国内只有少数厂家能生产直径较小的锻造 Cr12MoV轧辊, 而且成品率很低, 价格也较贵。 直径大于 φ 500的锻造 Cr12MoV轧辊国内目前尚无厂家生产, 需依赖进口, 国外生产厂家也很 少。 大直径的锻造合金工具钢焊接钢管用轧辊的生产厂家主要是意大利 EURO公司和曰本山阳精机公司。 国内焊接钢管用轧辊, 目前基本采用 GCr15、 3Cr2W8V、 Cr12 ( YB/T 128 )及 9Cr2Mo牌号等锻造合金工具钢 进行生产。 由于材料的性能、 生产工艺水平等诸多因素的影响, 使得这 些轧辊在耐磨等性能上表现较差, 尤其不能适应引进国外轧管生产线的 工况条件和技术要求, 与国际先进水平产品相比尚有一定距离。 ' 以上所述用于焊接钢管轧机的各种轧辊, 国内夕卜目前所采用的都是 锻造合金工具钢工艺, 在锻造轧辊生产中存在如下明显的不足和缺点: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe ritual roll, and more particularly to a casting roll for rolling a spliced steel pipe, the material of which is cast high chrome iron or cast high chrome steel. BACKGROUND OF THE INVENTION Rolls are the main components consumed in the production of flat steel tube rolling mills. The quality and life of the rolls directly affect the quality and production efficiency of the welded steel tubes. The rolls are in direct contact with the rolling stock and complete the rolling process. While subjecting to the action of large compressive stress, it is also subject to rolling and sliding friction, and some are also affected by the chilling heat, so the wear is severe and needs to be replaced frequently. At present, there are various grades of rolls for welded steel tube rolling mills representing the international advanced level, such as X165CrMoV12KU produced by German manufacturers X165CrMoV12 or X155CrMoV12, American manufacturer D2 and SKD11, SKD61 alloy tool steel forging rolls produced by Japanese manufacturers. Domestically introduced welded steel pipe production lines such as Baosteel, Shanghai Zhongyou, Shengli Oilfield, etc., are basically used for forging rolls of alloy tool steel produced by German and Japanese manufacturers. The material used in the domestic advanced welded steel tube rolling mill is close to the above-mentioned foreign grade Cr 12 MoV cold work die steel. The use of this steel has high requirements on the purity of the material, and the difficulty in forging and heat treatment is very large. Manufacturers can produce forged Cr 12 MoV rolls with smaller diameters, and the yield is very low and the price is relatively expensive. Forged Cr 12 MoV rolls with a diameter greater than φ 500 are currently not produced in China, and depend on imports, and there are few foreign manufacturers. The manufacturers of large-diameter forged alloy tool steel welded steel pipe are mainly Italian EURO company and Sakamoto Sanyo Seiki Co., Ltd. For domestic welding of steel pipe, the production of forged alloy tool steel such as GCr 15 , 3Cr 2 W 8 V, Cr 12 (YB/T 128 ) and 9Cr 2 Mo is basically used. Due to many factors such as the performance of the material, the level of production technology, etc. Some of the rolls perform poorly in terms of wear resistance and the like, and in particular, they cannot adapt to the working conditions and technical requirements of the introduction of foreign rolling pipe production lines, and there is still a certain distance compared with international advanced level products. 'The above various rolls for welding steel tube rolling mills, all of which are currently used in the forged alloy tool steel process, have the following obvious shortcomings and shortcomings in the production of forging rolls:
①上述合金工具钢锻造轧辊生产工艺较复杂、 工艺难度较高、 而且 流程长: 通常需要经过炼钢、 精炼、 真空脱气、 (国外还加真空脱碳, 要求非金属夹杂总量低于 0.10% ) 浇铸、 锻造、 粗加工、 热处理、 再精 加工才能交付使用。 1 The above-mentioned alloy tool steel forging roll production process is more complicated, the process is more difficult, and the process is long: usually requires steelmaking, refining, vacuum degassing, (there is also vacuum decarburization in foreign countries, the total non-metallic inclusions are required to be less than 0.10) %) Casting, forging, roughing, heat treatment, refinishing can be delivered.
②由于合金工具钢焊接钢管轧机用轧辊规格品种多、 同规格品种批 量太小, 基本同规格品种只需制造 1 ~ 2件, 加工锻模成本高较难形成 模锻, 多数采用自由锻。 因锻坯与实际需要尺寸差距较大, 使得后续机 加工量大, 材料利用率低, 一般在 50 ~ 60%, 个别的仅有 30%。 2Because of the wide variety of rolls for alloy tool steel welded steel tube mills, the batch size of the same specification is too small, and only one to two pieces are required to be manufactured in the same specification. The cost of processing forgings is difficult to form die forging, and most of them are free forging. Due to the large difference between the forging blank and the actual required size, the subsequent machining volume is large, and the material utilization rate is low, generally 50 to 60%, and only 30% for individual.
' ③合金工具钢焊接钢管轧机用大直径轧辊, 除上面①所述原因外, 还因为体积粗大, 艮难通过锻造来改善钢的内部组织结构以达到良好的 性能指标。 '3 alloy tool steel welded steel pipe mill with large diameter rolls, in addition to the reasons mentioned in the above 1, but also because of the large volume, it is difficult to improve the internal structure of the steel through forging to achieve good performance indicators.
④合金工具钢焊接钢管用轧辊必须经过热处理, 以获得所需要的表 面高硬度工作层。 但是合金工具锻钢的硬度是靠淬火来改变其金相组织 而获得的, 因淬火的深度有限, 所以形成的高硬度工作层比较薄, 且组 织结构不均匀, 由表及里造成硬度梯度。 在工作中为保证轧辊精度, 需 进行多次修磨, 当磨损超过有效淬火层时, 硬度便大大降低, 乃至无法 继续使用, 从而大大影响了轧辊的使用寿命。 近十几年来, 国内外对高铬铸铁或高鉻铸钢新材料的研究有了很大 进展, 国内外也有高铬铸造轧辊在板带生产中应用的实例和报道, 但还 未曾见有将铸造高铬铁或铸造高铬钢轧辊应用到焊接钢管轧机生产中 的报道或实例。 发明内容 本发明的目的是要在焊接钢管轧机上应用铸造轧辊, 提供一种铸造 高铬铁或铸造高铬钢轧辊, 使其能克服合金工具钢锻造轧辊在使用时耐 磨性差,使用寿命低以及使用性能和效果不好等缺点, 同时也解决了焊 接钢管轧机目前所使用的锻造轧辊在锻造加工时难度大, 工艺流程长、 材料利用率低等问题。 本发明采用以下技术方案实现其目的: 在焊接钢管轧机上采用铸造 轧辊, 轧辊的材质选用高铬铁或高铬钢。 铸造高铬铁轧辊的成分为(重量%): C: 1.8-2.8%, Si: <1.0%, Mn: <1.0%, P: <0.05%, S: <0.05%, Cr: 12~22%, Ni: 0.5 ~ 3.0%, Mo: 0.8-3.0%, Ti: 0 - 0.3%, V: 0~ 1.0%, Cu: 0~ 1.0%, RE: 0.01 ~ 0.5%, 其余为 Fe。 铸造高铬钢轧辊轧辊的成分为(重量%): C: 0.7-1.2%, Si: 1.0%, Mn: <1.0%, P: <0.05%, S: 0.05%, Cr: 8~ 12%, Ni: 0.5 - 2.0%, Mo: 0.8 ~ 3.0%, Ti: 0-0.3%, V: 0~ 1.0%, W: 0~0.8%, RE: 0.01 ~ 0.5%, 其余为 Fe。 本发明与现有技术比较, 其优点在于: ①本发明在焊接钢管轧机上 采用铸造高铬铁或铸造高铬钢轧辊, 尤其是大直径的铸造轧辊, 其金相 组织比锻造合金工具钢轧辊要合理, 其强度、 硬度和耐磨等性能比锻造 合金工具钢轧辊优良, 因此其使用效果和使用寿命均优于锻造合金工具 钢轧辊; ②在制造铸造高格铁或高铬钢轧辊时采用铸造成型工艺, 其流 程比锻压工艺短、 工艺简单、 成本低; ③采用铸造成型工艺, 比采用锻 压成型更加接近成品轧辊尺寸, 可大大减少加工量, 提高材料利用率。 本发明所提供的铸造高铬铁或高铬钢轧辊, 是通过对高铬铁或高铬 钢进行常规熔炼、 铸造、 粗加工、 热处理和精加工, 制成铸造高铬铁或 高鉻钢轧辊, 应用在轧制焊接钢管的軋机上。 附图说明 图 1为焊接直缝钢管用侧挤压轧辊 图 2为焊接矩形钢管用下轧辊 图 3 为焊接直缝钢管用上挤压轧辊 具体实施方式 以下结合附图和实施例对本发明作更详细的说明。 本发明将铸造高铬铁或高铬钢轧辊应用于焊接钢管轧机上, 以代替 不同材质的锻造合金工具钢轧辊。 该轧辊可以用在圆形焊接钢管轧机、 螺旋焊接钢管轧机、 矩形焊接钢管轧机等各种形状的直缝焊接钢管轧机 上。 本发明的铸造高铬铁轧辊采用以下成分(重量%): C: 1.8-2.8%, Si: < 1.0%, Mn: < 1.0%, P: <0.05%, S: <0.05%, Cr: 12— 22%, Ni: 0.5 - 3.0%, Mo: 0.8 - 3.0%, Ti: 0 - 0.3%, V: 0 - 1.0%, Cu: 0~1.0%, RE: 0.01-0.5%, 其余为 Fe。 铸造高铬铁轧辊的优选成 分为(重量%): C: 1.8-2.1%, Si: <0.8%, Mn: <0.8%, P: 0.04%, S: 0.04%, Cr: 17 - 20%, Ni: 0.8 ~ 1.8%, Mo: 1.4 ~ 2.5%, Ti: 0~ 0.3%, V: 0 - 0.5%, Cu: 0~0.5%, RE: 0.01 ~ 0.2%, 其余为 Fe。 本发明的铸造高铬钢轧辊成分如下 (重量%) : C: 0.7-1.2%,4 alloy tool steel welded steel pipe rolls must be heat treated to obtain the required high hardness working layer. However, the hardness of the forged steel of the alloy tool is obtained by quenching the metallographic structure. Because of the limited depth of the quenching, the formed high-hardness working layer is relatively thin, and the microstructure is uneven, resulting in a hardness gradient from the surface. In order to ensure the accuracy of the roll during the work, it is necessary to perform multiple dressing. When the wear exceeds the effective quenching layer, the hardness is greatly reduced, and the use cannot be continued, which greatly affects the service life of the roll. In the past ten years, domestic and foreign research on high chromium cast iron or high chromium cast steel new materials has made great progress. There are also examples and reports on the application of high chromium casting rolls in strip production at home and abroad, but it has not been seen yet. Reports or examples of the application of cast high chromium iron or cast high chromium steel rolls to the production of welded steel tube mills. SUMMARY OF THE INVENTION The object of the present invention is to apply a casting roll to a welded steel tube rolling mill to provide a casting High-chromium iron or cast high-chromium steel rolls, which can overcome the shortcomings of poor wear resistance, low service life and poor performance and poor performance of alloy tool steel forging rolls. It also solves the current use of welded steel tube rolling mills. The forging rolls are difficult to forge, long in process flow, and low in material utilization. The invention adopts the following technical solutions to achieve the purpose: The casting roll is used on the welded steel tube rolling mill, and the material of the roll is selected from high chromium iron or high chromium steel. The composition of the cast high chromium iron roll is (% by weight): C: 1.8-2.8%, Si: <1.0%, Mn: <1.0%, P: <0.05%, S: <0.05%, Cr: 12-22% Ni: 0.5 ~ 3.0%, Mo: 0.8-3.0%, Ti: 0 - 0.3%, V: 0~1.0%, Cu: 0~1.0%, RE: 0.01 ~ 0.5%, and the rest is Fe. The composition of the cast high chromium steel roll is (% by weight): C: 0.7-1.2%, Si: 1.0%, Mn: <1.0%, P: <0.05%, S: 0.05%, Cr: 8-12%, Ni: 0.5 - 2.0%, Mo: 0.8 to 3.0%, Ti: 0-0.3%, V: 0 to 1.0%, W: 0 to 0.8%, RE: 0.01 to 0.5%, and the balance being Fe. Compared with the prior art, the invention has the following advantages: 1. The invention adopts cast high chromium iron or cast high chromium steel roll on the welded steel tube rolling mill, especially the large diameter casting roll, and the metallographic structure is better than the forged alloy tool steel roll. To be reasonable, its strength, hardness and wear resistance are better than that of forged alloy tool steel rolls, so its use effect and service life are better than forged alloy tool steel rolls; 2 when manufacturing cast high iron or high chromium steel rolls The casting molding process has a shorter process than the forging process, simple process and low cost. 3 The casting molding process is closer to the finished roll size than the forging forming process, which can greatly reduce the processing amount and improve the material utilization rate. The cast high-chromium or high-chromium steel roll provided by the invention is made by casting, high-chromium or high-chromium steel by conventional smelting, casting, roughing, heat treatment and finishing, and is made into a cast high-chromium or high-chromium steel roll. , applied to rolling mills for rolling welded steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side extrusion roll for welding a straight seam steel pipe. FIG. 2 is a lower roll for welding a rectangular steel pipe. 3 is an embodiment of an upper extrusion roll for welding a straight seam steel pipe. The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. The invention applies a cast high chromium iron or high chromium steel roll to a welded steel tube rolling mill to replace the forged alloy tool steel rolls of different materials. The roll can be used on a straight seam welded steel pipe mill of various shapes such as a circular welded steel pipe rolling mill, a spiral welded steel pipe rolling mill, and a rectangular welded steel pipe rolling mill. The cast high chromium iron roll of the present invention has the following composition (% by weight): C: 1.8-2.8%, Si: < 1.0%, Mn: < 1.0%, P: <0.05%, S: <0.05%, Cr: 12 — 22%, Ni: 0.5 - 3.0%, Mo: 0.8 - 3.0%, Ti: 0 - 0.3%, V: 0 - 1.0%, Cu: 0~1.0%, RE: 0.01-0.5%, and the balance being Fe. The preferred composition of the cast high chromium iron roll is (% by weight): C: 1.8-2.1%, Si: <0.8%, Mn: <0.8%, P: 0.04%, S: 0.04%, Cr: 17 - 20%, Ni: 0.8 to 1.8%, Mo: 1.4 to 2.5%, Ti: 0 to 0.3%, V: 0 to 0.5%, Cu: 0 to 0.5%, RE: 0.01 to 0.2%, and the balance being Fe. The composition of the cast high chromium steel roll of the present invention is as follows (% by weight): C: 0.7-1.2%,
Si: <1.0%, Mn: < 1.0%, P: <0.05%, S: <0.05%, Cr: 8~ 12%, Ni: 0.5-2.0%, Mo: 0.8-3.0%, Ti: 0~0.3%, V: 0~.1.0%, W: 0~0.8%, RE: 0.01-0.5%, 其余为 Fe。 其优选成分为 (重量% ): C: 0.9-1.1%, Si: 0.4 - 0.8%, Mn: 0.5-0.9%, P: <0.04%, S: <0.04%, Cr: 9~11%, Ni: 0.8 ~ 1.6%, Mo: 1.0 ~ 2.5%, Ti: 0~ 0.3%, V: 0~0.6%, W: 0~0.5%, RE: 0.01 ~ 0.2%, 其余为 Fe。 本发明在铸造高铬铁或铸造高铬钢轧辊中加入了稀土合金元素 RE。稀土合金元素进入钢液中可形成硫化物、氧化物和其它夹杂化合物, 其熔点高于钢液凝固温度, 因此, 稀土化合物质点在浇铸凝固过程中起 晶核作用, 从而有效地细化铸造轧辊的结晶组织, 减轻了枝晶程度, 对 高铬铸铁或铸钢轧辊尤为显著。 由于稀土元素的加入, 使高铬铸铁或高 铬铸钢轧辊的晶粒更加细化, 提高了高铬铸铁或铸钢轧辊的塑性和冲击 韧性; 改善了铸件的表面质量,提高了成品率,减少了轧辊的热裂倾向。 Si: <1.0%, Mn: < 1.0%, P: <0.05%, S: <0.05%, Cr: 8-12%, Ni: 0.5-2.0%, Mo: 0.8-3.0%, Ti: 0~0.3 %, V: 0~.1.0%, W: 0~0.8%, RE: 0.01-0.5%, and the rest are Fe. Its preferred composition is (% by weight): C: 0.9-1.1%, Si: 0.4 - 0.8%, Mn: 0.5-0.9%, P: <0.04%, S: <0.04%, Cr: 9-11%, Ni : 0.8 ~ 1.6%, Mo: 1.0 ~ 2.5%, Ti: 0~0.3%, V: 0~0.6%, W: 0~0.5%, RE: 0.01 ~ 0.2%, the rest is Fe. The present invention incorporates a rare earth alloying element RE in a cast high chromium iron or cast high chromium steel roll. The rare earth alloy elements can form sulfides, oxides and other inclusion compounds in the molten steel, and the melting point is higher than the solidification temperature of the molten steel. Therefore, the rare earth compound particles act as nucleation during the casting solidification process, thereby effectively refining the casting rolls. The crystal structure reduces the degree of dendrite, especially for high chromium cast iron or cast steel rolls. Due to the addition of rare earth elements, the grains of high chromium cast iron or high chromium cast steel rolls are refined, and the plasticity and impact toughness of high chromium cast iron or cast steel rolls are improved; the surface quality of the castings is improved, and the yield is improved. The hot cracking tendency of the rolls is reduced.
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更正页(细则第 91条) 本发明使用相应的铁合金、 废钢等原料进行常规熔炼, 获得需要的 铁水或钢水, 采取常规的铸造, 获得需要的毛坯, 然后进行常规的热处 理和车、 磨等加工, 生产出焊接钢管轧机用铸造高铬铁或铸造高铬钢轧 辊。 实施例 1 参照图 1所示, 根据本发明所述的将铸造高铬铁轧辊应用于轧制焊 接钢管轧机上的用途, 本实施例用铸造生产工艺制造了一套共 2件 φ 530.0 焊接钢管轧机用侧挤压轧辊, 其成分选用以下高铬铁成分 (重量 %): C: 1.8%, Si: 0.8%, Mn: 0.8%, P: 0.038%, S: 0.034%, Cr: 13%, Ni: 1.0 %, Mo: 1.4%, Ti: 0.2%, V: 0.2%, Cu: 0.5%, RE: 0.05%, 其余为 Fe。 根据以上成分要求选定原料配比, 在中频感应 电炉中进行熔炼、 铸造, 获得需要的毛坯, 然后进行热处理和车、 磨等 加工, 制造出焊接钢管轧机用侧挤压轧辊。 本实施例 1的焊接钢管轧机用侧挤压轧辊, 毛坯重量为 1657kg/件, 成品重量为 1292.5kg/件,材料利用率为 78%。由于本实施例的孔型很深, 即外型直径差距较大, 两端最大直径为 φ 856mm, 中间孔型凹处最小直 径为 φ 589.63mm, 高度为 575mm, 内孔为 φ 330mm, 若采用自由锻方 式取得毛坯, 材料利用率最高只能达到 50%左右。 本实施例的侧挤压轧 辊的成品硬度为 HRC59.5 ~ 62, 在国内引进的 Φ 610焊接钢管轧机上实 验, 其使用寿命达到并超过了国外进口锻造合金工具钢垾接钢管轧辊的 水平。通过实验证明,在焊接钢管轧机上完全可以应用铸造高铬铁轧辊, 提供高水平高寿命的焊接钢管轧机用铸造轧辊。 实施例 2 实施例 2的形状如图 2所示。选用以下高铬铁成分 (重量%): C: 2.8%, Si: 0.6%, Mn: 1.0%, P: 0.031%, S: 0.035%, Cr: 22%, Ni: 2.5%, Mo: 2.0%, Ti: 0.1%, V: 0.3%, Cu: 0.5%, RE: 0.1%, 其余为 Fe, 铸造生产一套共 2件 500 x 500mm焊接矩形钢管轧机用下轧辊。根据以 上成分要求选定原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需 要的毛坯, 然后进行热处理和车、 磨等加工, 生产出焊接矩形钢管轧机 用下轧辊。 实施例 2为 500 X 500mm焊接矩形钢管轧机用下轧辊, 毛坯重量为 3513kg/件, 成品重量为 2780kg/件, 材料利用率为 79.1%。 该轧辊最大 外径 (M350mm、最小外径 cj) 660mm、 高度为 530mm、 内孔为 4 350mm。 本实施例若采用自由锻方式取得毛坯,材料利用率最高只能达到 55%左 右。本实施例的成品硬度为 HRC55 ~ 58,在国内最大的焊接方矩钢管轧 机上实验, 其一次性使用寿命超过国产锻造合金工具钢轧辊的 3倍, 且 每次修复后的使用寿命均可超过国产锻造合金工具钢轧辊的 3倍以上, 也超过了国外进口锻造合金工具钢焊接钢管轧辊的寿命。 实施例 3 实施例 3用铸造生产工艺制造了 1件 Φ 219焊接钢管轧机用下轧辊, 其成分选用以下高铬铁成分 (重量%): C: 1.75%, Si: 0.5%, Mn: 0.7%, P: 0.037%, S: 0.035%, Cr: 17.5%, Ni: 0.8 %, Mo: 0.8%, Ti: 0.2%, V: 0.4%, Cu: 0.8%, RE: 0.02%, 其余为 Fe。 才艮据以上所选成分选定 原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要的毛坯, 然后 进行热处理和车、 磨等加工, 制造出焊接钢管轧机用下轧辊。 实施例 3的下轧辊, 毛坯重量为 122kg/件, 成品重量为 91.5kg/件, 材料利用率为 75%。 由于本实施例的形状较复杂, 中间凸出部分最大直 径为 Φ 401.52ιηηι、 厚 106mm, 两边凸起处直径为 φ 250mm、 单面厚 47mm, 内孔为 Φ 160ΙΉΠΙ, 若采用自由锻方式取得毛坯, 材料利用率最 高只能达到 49%左右。 本实施例的成品硬度为 HRC58.8 ~ 61, 在国内引 进的 Φ 250焊接钢管轧机上实验, 其使用寿命达到并超过了进口锻造合 金工具钢焊接钢管轧辊。 其性能优于锻造轧辊, 寿命也高于锻造轧辊。 实施例 4 实施例 4用铸造生产工艺制造了 1件 Φ 168焊接钢管轧机用下轧辊, 其成分选用以下高铬铁成分(重量%): C: 2.1%, Si: 0.8%, Mn: 0.6%, P: 0.033%, S: 0.030%, Cr: 21%, Ni: 1.8%, Mo: 2.2%, Ti: 0.3%, Correction page (Article 91) The invention uses the corresponding ferroalloy, scrap steel and other raw materials for conventional smelting to obtain the required molten iron or molten steel, adopts conventional casting to obtain the required blank, and then performs conventional heat treatment and car, grinding and the like to produce a welded steel pipe rolling mill for casting. High chrome iron or cast high chrome steel rolls. Embodiment 1 Referring to FIG. 1, according to the present invention, a casting high-chromium iron roll is applied to a rolling-welded steel pipe rolling mill. In this embodiment, a set of 2 pieces of φ 530.0 welded steel pipe is manufactured by a casting production process. The side extrusion rolls for rolling mills are made of the following high chromium iron components (% by weight): C: 1.8%, Si: 0.8%, Mn: 0.8%, P: 0.038%, S: 0.034%, Cr: 13%, Ni: 1.0%, Mo: 1.4%, Ti: 0.2%, V: 0.2%, Cu: 0.5%, RE: 0.05%, and the balance being Fe. According to the above composition requirements, the raw material ratio is selected, and the raw material is smelted and cast in a medium frequency induction electric furnace to obtain a desired blank, and then subjected to heat treatment, car, grinding, etc., to produce a side extrusion roll for a welded steel pipe rolling mill. The side extrusion roll for the welded steel tube rolling mill of the first embodiment has a weight of 1657 kg/piece, a finished product weight of 1292.5 kg/piece, and a material utilization rate of 78%. Since the hole type of the embodiment is deep, that is, the outer diameter of the outer diameter is large, the maximum diameter of the two ends is φ 856 mm, the minimum diameter of the intermediate hole type concave is φ 589.63 mm, the height is 575 mm, and the inner hole is φ 330 mm, if The free forging method obtains the blank, and the material utilization rate can only reach about 50%. The finished product of the side extrusion roll of this embodiment has a hardness of HRC 59.5 ~ 62. The test life of the Φ 610 welded steel tube rolling mill introduced in China has reached and exceeded the level of the imported imported forged alloy tool steel spliced steel pipe. It has been proved by experiments that casting high-chromium iron rolls can be applied to the welded steel tube rolling mill to provide high-level and long-life casting rolls for welded steel tube rolling mills. Example 2 The shape of Example 2 is shown in Fig. 2. The following high chromium iron components (% by weight) were selected: C: 2.8%, Si: 0.6%, Mn: 1.0%, P: 0.031%, S: 0.035%, Cr: 22%, Ni: 2.5%, Mo: 2.0% , Ti: 0.1%, V: 0.3%, Cu: 0.5%, RE: 0.1%, and the rest is Fe. A set of two 500 x 500mm welded rectangular steel tube mills are used for casting. According to the above composition requirements, the ratio of raw materials is selected, and smelting and casting are carried out in a medium frequency induction furnace. The desired blank is then subjected to heat treatment, car, grinding, etc. to produce a lower roll for a welded rectangular steel tube mill. Example 2 is a lower roll for a 500 X 500 mm welded rectangular steel tube rolling mill. The weight of the blank is 3513 kg/piece, the weight of the finished product is 2780 kg/piece, and the material utilization rate is 79.1%. The maximum outer diameter (M350mm, minimum outer diameter cj) of the roll is 660mm, the height is 530mm, and the inner hole is 4350mm. In this embodiment, if the blank is obtained by free forging, the material utilization rate can only reach about 55%. The hardness of the finished product of this embodiment is HRC55 ~ 58, the experiment on the largest welded square steel tube rolling mill in China, the service life of the finished steel is more than 3 times that of the domestic forged alloy tool steel roll, and the service life after each repair can exceed More than three times that of domestic forged alloy tool steel rolls, it also exceeds the life of imported forged alloy tool steel welded steel pipe rolls. Example 3 In Example 3, a lower roll for a Φ 219 welded steel tube rolling mill was produced by a casting production process, and the composition thereof was selected from the following high chromium iron components (% by weight): C: 1.75%, Si: 0.5%, Mn: 0.7% , P: 0.037%, S: 0.035%, Cr: 17.5%, Ni: 0.8%, Mo: 0.8%, Ti: 0.2%, V: 0.4%, Cu: 0.8%, RE: 0.02%, and the balance being Fe. According to the selected ingredients, the raw material ratio is selected, and smelting and casting are performed in an intermediate frequency induction furnace to obtain a desired blank, and then heat treatment, car, grinding, etc. are performed to manufacture a lower roll for a welded steel pipe mill. The lower roll of Example 3 had a weight of 122 kg/piece, a finished product weight of 91.5 kg/piece, and a material utilization rate of 75%. Due to the complicated shape of the embodiment, the maximum diameter of the central convex portion is Φ 401.52 ιηηι, and the thickness is 106 mm, the diameter of the convex portions on both sides is φ 250 mm, the thickness of one side is 47 mm, and the inner hole is Φ 160 ΙΉΠΙ. If the blank is obtained by free forging The material utilization rate can only reach about 49%. The hardness of the finished product of this embodiment is HRC 58.8 ~ 61. The test on the Φ 250 welded steel tube rolling mill introduced in China has reached the service life of the imported forged alloy tool steel welded steel pipe. Its performance is superior to that of forged rolls and its life is higher than that of forged rolls. Example 4 In Example 4, a lower roll for a Φ 168 welded steel tube rolling mill was produced by a casting production process, and the composition thereof was selected from the following high chromium iron components (% by weight): C: 2.1%, Si: 0.8%, Mn: 0.6% , P: 0.033%, S: 0.030%, Cr: 21%, Ni: 1.8%, Mo: 2.2%, Ti: 0.3%,
6 6
更正页(细则第 91条) V: 0.5%, Cu: 0.2%, RE: 0.2%, 其余为 Fe。 根据以上所选成分选定 原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要的毛坯, 然后 进行热处理和车、 磨等加工, 制造出焊接钢管轧机用下轧辊。 实施例 4的下轧辊, 毛坯重量为 92kg/件, 成品重量为 68kg/件, 材 料利用率为 74%。 由于本实施例的形状较复杂, 中间凸出部分最大直径 为 φ 380mm、厚 86mm,两边凸起处直径为 φ 200mm、单面厚 38mm, 内孔为 φ 160mm, 若采用自由锻方式取得毛坯, 材料利用率最高 只能达到 50%左右。 本实施例的成品硬度为 HRC59 ~ 61 , 在国内引进 的 Φ 168焊接钢管轧机上实验, 其使用寿命达到并超过了进口锻造合金 工具钢焊接钢管轧辊的水平。 其性能优于锻造轧辊, 寿命也高于锻造轧 辊。 实施例 5 实施例 5用铸造生产工艺制造了 2件 φ 168焊接钢管轧机用挤压轧 辊, 其成分选用以下高铬铁成分(重量%): C: 2.0%, Si: 0.4%, Mn: 0.5%, P: 0.039%, S: 0.035%, Cr: 20%, Ni: 1.5%, Mo: 2.5%, Ti: 0.3%, V: 0.3%, Cu: 0.4%, RE: 0.15%, 其余为 Fe。 根据以上 所选成分选定原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要 的毛坯, 然后进行热处理和车、 磨等加工, 制造出焊接钢管轧机用挤压 轧辊。 实施例 5的挤压轧辊, 毛坯重量为 103kg/件, 成品重量为 74kg/件, 材料利用率为 72%。 该轧辊的最大直径为 φ 408ιηπι、 厚 105mm, 内孔 为 Φ 155mm, 若采用自由锻方式取得毛坯, 材料利用率最高只能 达到 50%左右。 本实施例的成品硬度为 HRC58.8 ~ 61 , 在国内引进的 φ 168焊接钢管轧机上实验, 其使用寿命达到并超过了进口锻造合金工具 钢焊接钢管轧辊的水平。 其性能优于锻造轧辊, 寿命也高于锻造轧辊。 实施例 6 . 实施例 6的形状如图 3所示。 为一套共 2件 φ 273.1焊接钢管轧机 用上挤压轧辊,其成分选用以下高铬钢成分 (重量%): C: 0.9%, Si: 0.8%, Mn: 0.8%, P: 0.029%, S: 0.031%, Cr: 10%, Ni: 0.8%, Mo: 0.8%, Ti: 0 .3%, V: 0.5%, W: 0 .3%, RE: 0.015%, 其余为 Fe。 根据以 上成分要求选定原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需 要的毛坯, 然后进行热处理和车、 磨等加工, 制造出焊接钢管用上挤压 轧辊。 实施例 6的毛坯重量为 91.6kg/件, 成品重量为 65.5kg/件, 材料 利用率为 71.5%。 本实施例若采用自由锻方式取得毛坯, 材料利用率最 高只能达到 55%左右。 本实施例的成品硬度为 HRC55.5 ~ 57。 在国内引 进的 Φ 325焊接钢管轧机上进行实验, 其使用寿命达到并超过了国外进 口锻造合金工具钢轧辊的水平。 经 4次车削修复, 每次车削量为 2mm 左右, 外径减少 16mm后硬度仍保持在 HRC55 ~ 57。 实施例 7 实施例 7为一套共 2件 Φ 610焊接钢管轧机用上挤压轧辊, 其成分 选用以下高铬钢成分(重量%): C: 1.2%, Si: 0.6%, Mn: 0.7%, P: 0.033%, S: 0.029%, Cr: 8%, Ni: 2.0%, Mo: 1.8%, Ti: 0 .1%, V: 0.2%, W: 0 .5%, RE: 0.1%, 其余为 Fe。 根据以上成分要求选定 原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要的毛坯, 然后 进行热处理和车、 磨等加工, 制造出焊接钢管用上挤压轧辊。 实施例 7 的毛坯重量为 268kg/件, 成品重量为 193kg/件, 材料利用率为 72%。 本 实施例若采用自由锻方式取得毛坯, 材料利用率最高只能达到 55%左 右。 本实施例的成品硬度为 HRC55.5 ~ 57。 在国内引进的 Φ 610焊接钢 管轧机上进行实验, 其使用寿命达到并超过了国外进口锻造合金工具钢 轧辊的水平。经 5次车削修复,每次车削量为 2mm左右,外径减少 20mm 后硬度仍保持在 HRC55 ~ 57。 实施例 8 实施例 8为'一套共 2件 φ 610焊接钢管轧机用侧挤压轧辊, 其成分 选用以下高铬钢成分 (重量%): C: 0.7%, Si: 0.5%, Mn: 1.0%, P: 0.041%, S: 0.038%, Cr: 9%, Ni: 0.5%, Mo: 2.5%, Ti: 0 .2%, V: 0.8%, W: 0.8%, RE: 0.08%, 其余为 Fe。 根据以上成分要求选 Correction page (Article 91) V: 0.5%, Cu: 0.2%, RE: 0.2%, and the balance being Fe. According to the selected components selected above, the raw material ratio is selected, and smelting and casting are performed in a medium frequency induction electric furnace to obtain a desired blank, and then heat treatment, car grinding, and the like are performed to produce a lower roll for a welded steel pipe rolling mill. The lower roll of Example 4 had a weight of 92 kg/piece, a finished product weight of 68 kg/piece, and a material utilization rate of 74%. Due to the complicated shape of the embodiment, the maximum diameter of the central protruding portion is φ 380 mm and the thickness is 86 mm, the diameter of the convex portions on both sides is φ 200 mm, the thickness of one side is 38 mm, and the inner hole is φ 160 mm. If the blank is obtained by free forging, The material utilization rate can only reach about 50%. The hardness of the finished product of this embodiment is HRC59 ~ 61. The test on the Φ 168 welded steel tube rolling mill introduced in China has reached the service life of the imported forged alloy tool steel welded steel pipe. Its performance is superior to that of forged rolls and its life is higher than that of forged rolls. Example 5 In Example 5, two extrusion rolls for a φ 168 welded steel tube rolling mill were produced by a casting production process, and the composition thereof was selected from the following high chromium iron components (% by weight): C: 2.0%, Si: 0.4%, Mn: 0.5 %, P: 0.039%, S: 0.035%, Cr: 20%, Ni: 1.5%, Mo: 2.5%, Ti: 0.3%, V: 0.3%, Cu: 0.4%, RE: 0.15%, and the balance is Fe . According to the selected components selected above, the raw material ratio is selected, and smelting and casting are performed in an intermediate frequency induction furnace to obtain a desired blank, and then heat treatment, car, grinding, and the like are performed to produce a squeeze roll for a welded steel pipe rolling mill. The extrusion roll of Example 5 had a weight of 103 kg/piece, a finished product weight of 74 kg/piece, and a material utilization rate of 72%. The maximum diameter of the roll is φ 408 ηηπι, the thickness is 105 mm, and the inner hole is Φ 155 mm. If the blank is obtained by free forging, the material utilization rate can only reach about 50%. The hardness of the finished product of this embodiment is HRC 58.8 ~ 61. The test life of the φ 168 welded steel tube rolling mill introduced in China has reached the service level of the imported forged alloy tool steel welded steel pipe. Its performance is superior to that of forged rolls and its life is higher than that of forged rolls. Example 6. The shape of Example 6 is shown in Fig. 3. For a set of 2 φ 273.1 welded steel tube mills, the upper extrusion rolls are made of the following high chromium steel components (% by weight): C: 0.9%, Si: 0.8%, Mn: 0.8%, P: 0.029%, S: 0.031%, Cr: 10%, Ni: 0.8%, Mo: 0.8%, Ti: 0.3%, V: 0.5%, W: 0.3%, RE : 0.015%, the rest is Fe. According to the above composition requirements, the raw material ratio is selected, and the raw material is smelted and cast in a medium frequency induction electric furnace to obtain a desired blank, and then heat treatment, car, grinding, and the like are performed to produce an upper extrusion roll for a welded steel pipe. The weight of the blank of Example 6 was 91.6 kg/piece, the weight of the finished product was 65.5 kg/piece, and the material utilization rate was 71.5%. In this embodiment, if the blank is obtained by free forging, the material utilization rate can only reach about 55%. The hardness of the finished product of this embodiment is HRC 55.5 ~ 57. The experiment was carried out on the domestically introduced Φ 325 welded steel tube rolling mill, and its service life reached and exceeded the level of imported forged alloy tool steel rolls. After 4 times of turning repair, the amount of turning is about 2mm, and the hardness is kept at HRC55 ~ 57 after the outer diameter is reduced by 16mm. Example 7 Example 7 is a set of 2 Φ 610 welded steel tube rolling mill upper extrusion rolls, the composition of which is selected from the following high chromium steel composition (% by weight): C: 1.2%, Si: 0.6%, Mn: 0.7% , P: 0.033%, S: 0.029%, Cr: 8%, Ni: 2.0%, Mo: 1.8%, Ti: 0.1%, V: 0.2%, W: 0.5%, RE: 0.1%, The rest is Fe. According to the above composition requirements, the raw material ratio is selected, and the raw material is smelted and cast in a medium frequency induction electric furnace to obtain a desired blank, and then heat treatment, car, grinding, and the like are performed to produce an upper extrusion roll for a welded steel pipe. The blank weight of Example 7 was 268 kg/piece, the finished product weight was 193 kg/piece, and the material utilization rate was 72%. In this embodiment, if the blank is obtained by free forging, the material utilization rate can only reach about 55%. The hardness of the finished product of this embodiment is HRC 55.5 ~ 57. Experiments were carried out on the domestically introduced Φ 610 welded steel tube rolling mill, and its service life reached and exceeded the level of imported forged alloy tool steel rolls. After 5 times of turning repair, the amount of turning is about 2mm, and the hardness is kept at HRC55 ~ 57 after the outer diameter is reduced by 20mm. Example 8 Example 8 is a set of two side squeezing rolls for a φ 610 welded steel tube rolling mill whose composition is selected from the following high chromium steel components (% by weight): C: 0.7%, Si: 0.5%, Mn: 1.0 %, P: 0.041%, S: 0.038%, Cr: 9%, Ni: 0.5%, Mo: 2.5%, Ti: 0.2%, V: 0.8%, W: 0.8%, RE: 0.08%, the rest For Fe. According to the above ingredients
8 8
更正页(细则第 91条) 定原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要的毛坯, 然 后进行热处理和车、 磨等加工, 制造出焊接钢管用侧挤压轧辊。 实施例Correction page (Article 91) The raw material ratio is smelted and cast in a medium frequency induction furnace to obtain a desired blank, and then heat treatment, car, grinding, etc. are performed to produce a side extrusion roll for a welded steel pipe. Example
8的毛坯重量为 5032kg/件,成品重量为 3975kg/件,材料利用率为 79%。 由于本实施例的孔型 4艮深, 即外型直径差距较大, 两端最大直径为 Φ 952.6mm, 中间孔型凹处最小直径为 φ 600.5mm, 高度为 690mm, 内孔 为 Φ 325ππη, 若采用自由锻方式取得毛坯, 材料利用率最高只能达到 50%左右。 本实施例的成品硬度为 HRC58 ~ 61。 在国内引进的 Φ 610焊 接钢管轧机上进行实检, 其使用寿命达到并超过了国外进口锻造合金工 具钢轧辊的水平。 实施例 9 实施例 9为一套共 1件 500 X 500悍接矩形钢管轧机用轧辊, 其成 分选用以下高铬钢成分 (重量%): C: 0.8%, Si: 1.0%, Mn: 0.5%, P: 0.037%, S: 0.034%, Cr: 11%, Ni: 1.0%, Mo: 1.0%, Ti: 0 .3%, V: 1.0%, W: 0 .1%, RE: 0.15%, 其余为 Fe。 才艮据以上成分要求选 定原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要的毛坯, 然 后进行热处理和车、 磨等加工, 制造出焊接钢管用侧挤压轧辊。 实施例The weight of the blank of 8 is 5032kg/piece, the weight of the finished product is 3975kg/piece, and the material utilization rate is 79%. Since the hole type of the embodiment is 4 艮 deep, that is, the outer diameter difference is large, the maximum diameter of both ends is Φ 952.6 mm, the minimum diameter of the intermediate hole type recess is φ 600.5 mm, the height is 690 mm, and the inner hole is Φ 325ππη, If the blank is obtained by free forging, the material utilization rate can only reach about 50%. The hardness of the finished product of this embodiment is HRC 58 ~ 61. The actual inspection was carried out on the domestically introduced Φ 610 welded steel tube rolling mill, and its service life reached and exceeded the level of imported imported forged alloy tool steel rolls. Example 9 Example 9 is a set of rolls for a 500 X 500 splicing rectangular steel tube mill, the composition of which is selected from the following high chromium steel components (% by weight): C: 0.8%, Si: 1.0%, Mn: 0.5% , P: 0.037%, S: 0.034%, Cr: 11%, Ni: 1.0%, Mo: 1.0%, Ti: 0.3%, V: 1.0%, W: 0.1%, RE: 0.15%, The rest is Fe. According to the above composition requirements, the ratio of raw materials is selected, and the raw material is smelted and cast in a medium frequency induction furnace to obtain a desired blank, and then heat treatment, car, grinding, etc. are performed to produce a side extrusion roll for welded steel pipe. Example
9的毛坯重量为 104kg/件, 成品重量为 73.5kg/件, 材料利用率为 76%。 本实施例若采用自由锻方式取得毛坯,材料利用率最高只能达到 50%左 右。 本实施例的成品硬度为 HRC58 ~ 61。 在国内引进的 500 x 500焊接 钢管轧机上进行实验, 其使用寿命达到并超过了国外进口锻造合金工具 钢轧辊的水平。 实施例 10 实施例 10为一套共 2件 500 X 500焊接矩形钢管轧机用轧辊, 其成 分选用以下高铬钢成分 (重量%): C: 1.1%, Si: 0.4%, Mn: 0.9%, P: 0.038%, S: 0.036%, Cr: 12%, Ni: 1.6%, Mo: 2.0%, Ti: 0 .2%, V: 0.6%, W: 0 .1%, RE: 0.01%, 其余为 Fe。 根据以上成分要求选 定原料配比, 在中频感应电炉中进行熔炼、 铸造, 获得需要的毛坯, 然 后进行热处理和车、 磨等加工, 制造出焊接钢管用侧挤压轧辊。 实施 例 10的毛坯重量为 107kg/件,成品重量为 79kg/件,材料利用率为 74%。 本实施例若采用自由锻方式取得毛坯,材料利用率最高只能达到 55%左 右, 且其外径为 cj 450mm、 厚度仅为 75mm, 锻造难度较大。 本实施例 的成品硬度为 HRC58 ~ 61。 在国内引进的 500 x 500焊接钢管轧机上进 行实验, 其使用寿命达到并超过了国外进口锻造合金工具钢轧辊的水 平。 本发明经过多次实验, 选用高铬铁或高铬钢作为焊接钢管轧机的轧 辊用材质。 由于其良好的合金化材料配比, 可使铸造轧辊获得里外均匀 的金相组织, 从而获得表里一致的强度、 硬度和耐磨性能。 本发明克服 了前述合金工具钢锻造轧辊由于淬硬层厚度有限、 由表及里组织不均 匀、 形成硬度梯度, 难于满足实际使用需要的不足。 其生产工艺简单, 生产周期短, 生产成本也较低。 本发明用在焊接钢管轧机上, 由于其材料组织里外均勾, 耐磨性以 及韧性有很大提高, 其强度达到 6 b > 500MPa, 硬度达到 HRC55 ~ 65 , 使用寿命成倍增加。 本发明的一次性使用寿命可达到国产锻造合金工具 钢焊接钢管轧辊的 2 ~ 3倍, 且每次修复后的使用寿命均可达到国产锻 造合金工具钢轧辊的 2 ~ 3倍以上, 可达到和超过德国、 意大利、 日本 等国际先进水平锻造合金工具钢悴接钢管轧辊的使用寿命, 经修磨多次 低了生产成本。 The weight of the blank of 9 is 104kg/piece, the weight of the finished product is 73.5kg/piece, and the material utilization rate is 76%. In this embodiment, if the blank is obtained by free forging, the material utilization rate can only reach about 50%. The hardness of the finished product of this embodiment is HRC 58 ~ 61. The experiment was carried out on a 500 x 500 welded steel tube rolling mill imported from China, and its service life reached and exceeded the level of imported forged alloy tool steel rolls. Embodiment 10 Embodiment 10 is a set of two rolls of 500 X 500 welded rectangular steel tube rolling mill, the composition of which is selected from the following high chromium steel components (% by weight): C: 1.1%, Si: 0.4%, Mn: 0.9%, P: 0.038%, S: 0.036%, Cr: 12%, Ni: 1.6%, Mo: 2.0%, Ti: 0.2%, V: 0.6%, W: 0.1%, RE: 0.01%, the rest For Fe. According to the above composition requirements, the raw material ratio is selected, and smelting and casting are performed in an intermediate frequency induction electric furnace to obtain a desired blank, and then heat treatment, car, grinding, and the like are performed to produce a side extrusion roll for a welded steel pipe. Implementation The blank weight of Example 10 was 107 kg/piece, the finished product weight was 79 kg/piece, and the material utilization rate was 74%. In this embodiment, if the blank is obtained by free forging, the material utilization rate can only reach about 55%, and the outer diameter is cj 450mm and the thickness is only 75mm, and the forging is difficult. The hardness of the finished product of this embodiment is HRC 58 ~ 61. The experiment was carried out on a 500 x 500 welded steel tube rolling mill imported from China, and its service life reached and exceeded the level of imported forged alloy tool steel rolls. After many experiments, the present invention selects high chromium iron or high chromium steel as the material for the roll of the welded steel tube rolling mill. Due to its good alloying material ratio, the casting rolls can obtain a uniform metallographic structure inside and outside, thereby obtaining consistent strength, hardness and wear resistance. The invention overcomes the shortcomings of the foregoing alloy tool steel forging rolls because the thickness of the hardened layer is limited, the surface and the inner structure are uneven, and the hardness gradient is formed, which is difficult to meet the practical use requirements. The production process is simple, the production cycle is short, and the production cost is also low. The invention is used on a welded steel tube rolling mill. Because of its material structure, the wear resistance and toughness are greatly improved, the strength reaches 6 b > 500 MPa, the hardness reaches HRC 55 ~ 65, and the service life is doubled. The disposable service life of the invention can reach 2~3 times of the domestic forged alloy tool steel welded steel pipe roll, and the service life after each repair can reach 2~3 times of the domestic forged alloy tool steel roll, and can reach More than Germany, Italy, Japan and other international advanced level forged alloy tool steel spliced steel pipe roll life, after grinding many times lower production costs.

Claims

权 利 要 求 书 Claim
1、 一种焊接钢管轧机用轧辊, 其特征在于在焊接钢管轧机上采用 铸造轧辊, 轧辊的材质为高铬铁或高铬钢。 1. A roll for a welded steel tube rolling mill, characterized in that a casting roll is used on a welded steel tube rolling mill, and the material of the roll is high chromium iron or high chromium steel.
2、 一种焊接钢管轧机用铸造高铬铁轧辊, 其特征在于铸造高铬铁 轧辊的成分为 (重量%): C: 1.8-2.8%, Si: < 1.0%, Mn: < 1.0%, P: <0.05%, S: <0.05%, Cr: 12~22%, Ni: 0.5 - 3.0%, Mo: 0.8 ~ 3.0%, Ti: 0~0.3%, V: 0~1.0%, Cu: 0~ 1.0%, RE: 0.01 ~ 0.5%, 其余为 Fe。 2. A cast high chromium iron roll for a welded steel tube rolling mill, characterized in that the composition of the cast high chromium iron roll is (% by weight): C: 1.8-2.8%, Si: < 1.0%, Mn: < 1.0%, P : <0.05%, S: <0.05%, Cr: 12~22%, Ni: 0.5 - 3.0%, Mo: 0.8 ~ 3.0%, Ti: 0~0.3%, V: 0~1.0%, Cu: 0~ 1.0%, RE: 0.01 ~ 0.5%, the rest is Fe.
3、 根据权利要求 2所述的铸造高铬铁轧辊, 其特征在于铸造高铬 铁轧辊的优选成分为 (重量%) : C: 1.8-2.1%, Si: 0.8%, Mn: < 0.8%, P: <0.04%, S: <0.04%, Cr: 17~20%, Ni: 0.8 - 1.8%, Mo: 1.4-2.5%, Ti: 0~0.3%, V: 0 - 0.5%, Cu: 0 - 0.5%, RE: 0.01 - 0.2%, 其余为 Fe。 3. A cast high chromium iron roll according to claim 2, characterized in that the preferred composition of the cast high chromium iron roll is (% by weight): C: 1.8-2.1%, Si: 0.8%, Mn: < 0.8%, P: <0.04%, S: <0.04%, Cr: 17-20%, Ni: 0.8 - 1.8%, Mo: 1.4-2.5%, Ti: 0-0.3%, V: 0 - 0.5%, Cu: 0 - 0.5%, RE: 0.01 - 0.2%, the rest is Fe.
4、 一种焊接钢管轧机用铸造高铬钢轧辊, 其特征在于铸造高铬钢 轧辊的成分为 (重量%): C: 0.7-1.2%, Si: < 1.0%, Mn: <1.0%, P: <0.05%, S: <0.05%, Cr: 8~ 12%, Ni: 0.5 ~ 2.0%, Mo: 0.8 ~ 3.0%, Ti: 0-0.3%, V: 0~1.0%, W: 0~0.8%, RE: 0.01 ~ 0.5%, 其余为 Fe。 4. A cast high chromium steel roll for a welded steel tube rolling mill, characterized in that the composition of the cast high chromium steel roll is (% by weight): C: 0.7-1.2%, Si: < 1.0%, Mn: <1.0%, P : <0.05%, S: <0.05%, Cr: 8~12%, Ni: 0.5 ~ 2.0%, Mo: 0.8 ~ 3.0%, Ti: 0-0.3%, V: 0~1.0%, W: 0~ 0.8%, RE: 0.01 ~ 0.5%, the rest is Fe.
5、 根据权利要求 4所述的焊接钢管轧机用铸造高铬钢轧辊, 其特 征在于铸造高铬钢轧辊的优选成分为(重量%): C: 0.9-1.1%, Si: 0.4 -0.8%, Mn: 0.5-0.9%, P: <0.04%, S: <0.04%, Cr: 9~ 11%, Ni: 0.8-1.6%, Mo: 1.0~2.5%, Ti: 0~0.3%, V: 0~0.6%, W: 0 ~ 0.5%, RE: 0.01-0.2%, 其余为 Fe。 5. A cast high chromium steel roll for a welded steel tube rolling mill according to claim 4, characterized in that the preferred composition of the cast high chromium steel roll is (% by weight): C: 0.9-1.1%, Si: 0.4 - 0.8%, Mn: 0.5-0.9%, P: <0.04%, S: <0.04%, Cr: 9-11%, Ni: 0.8-1.6%, Mo: 1.0-2.5%, Ti: 0-0.3%, V: 0 ~0.6%, W: 0 ~ 0.5%, RE: 0.01-0.2%, and the rest is Fe.
11  11
更正页(细则第 91条)  Correction page (Article 91)
PCT/CN2007/003299 2006-11-22 2007-11-21 Roller for welding pipe mill WO2008061452A1 (en)

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* Cited by examiner, † Cited by third party
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85102865A (en) * 1985-04-18 1987-03-04 冶金部钢铁研究总院 High-chromium roll steel and roll thereof
CN1080666A (en) * 1993-06-11 1994-01-12 山东省冶金研究所 A kind of low carbon high chrome casting iron high-abrasive material
JP2001181795A (en) * 1999-12-20 2001-07-03 Kogi Corp High chromium cast steel type rolling mill roll stock
CN1854328A (en) * 2005-04-20 2006-11-01 江苏共昌轧辊有限公司 Improved composite high-chromium iron-cast roller
CN1861829A (en) * 2005-05-11 2006-11-15 江苏共昌轧辊有限公司 Improved composite high chromium steel roller and preparation process thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2034880U (en) * 1988-05-28 1989-03-29 陈长顺 High chromium combined cast iron roller
JPH06192791A (en) * 1992-12-25 1994-07-12 Hitachi Ltd Working roll for multistage rolling and its production
JPH10317102A (en) * 1997-05-22 1998-12-02 Kanto Special Steel Works Ltd Work roll material for cold rolling excellent in wear resistance and seizure resistance
JP3539160B2 (en) * 1997-10-13 2004-07-07 Jfeスチール株式会社 Method for producing stainless steel with excellent descalability, surface properties and productivity
JP3570288B2 (en) * 1999-04-06 2004-09-29 住友金属工業株式会社 High Cr martensitic heat resistant steel with excellent hot workability
JP2004122137A (en) * 2002-09-30 2004-04-22 Jfe Steel Kk Method for manufacturing seamless martensitic stainless steel tube
JP4223414B2 (en) * 2004-02-02 2009-02-12 山陽特殊製鋼株式会社 Powdered high-speed tool steel for rolling rolls with excellent wear resistance and toughness

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85102865A (en) * 1985-04-18 1987-03-04 冶金部钢铁研究总院 High-chromium roll steel and roll thereof
CN1080666A (en) * 1993-06-11 1994-01-12 山东省冶金研究所 A kind of low carbon high chrome casting iron high-abrasive material
JP2001181795A (en) * 1999-12-20 2001-07-03 Kogi Corp High chromium cast steel type rolling mill roll stock
CN1854328A (en) * 2005-04-20 2006-11-01 江苏共昌轧辊有限公司 Improved composite high-chromium iron-cast roller
CN1861829A (en) * 2005-05-11 2006-11-15 江苏共昌轧辊有限公司 Improved composite high chromium steel roller and preparation process thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHAO W. ET AL.: "Research for application of rare earth in high Cr casting iron roller", JOURNAL OF WUHAN ENGINEERING INSTITUTE, vol. 17, no. 3, September 2005 (2005-09-01), pages 4 - 7 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101555570B (en) * 2009-05-11 2012-02-29 顾开明 High-chromium-nickel quinary alloy casting and production process thereof
CN101555569B (en) * 2009-05-11 2012-02-29 顾开明 High-alloy casting and production process thereof
DE102014000165A1 (en) * 2014-01-07 2015-07-09 Horst Diesing Alloy and process for matrix intrinsic tribocharged manganese oxide coatings for increased service life of hot working tools from S (HSS) iron base alloys
DE102014000165B4 (en) * 2014-01-07 2016-06-09 Horst Diesing Alloy for matrix intrinsic tribocharged manganese oxide coatings for extended service life of hot working tools made from S (HSS) iron based alloys

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