WO2019019238A1 - 一种白口铸铁的生产工艺 - Google Patents

一种白口铸铁的生产工艺 Download PDF

Info

Publication number
WO2019019238A1
WO2019019238A1 PCT/CN2017/098428 CN2017098428W WO2019019238A1 WO 2019019238 A1 WO2019019238 A1 WO 2019019238A1 CN 2017098428 W CN2017098428 W CN 2017098428W WO 2019019238 A1 WO2019019238 A1 WO 2019019238A1
Authority
WO
WIPO (PCT)
Prior art keywords
cast iron
rare earth
white cast
silicon alloy
earth silicon
Prior art date
Application number
PCT/CN2017/098428
Other languages
English (en)
French (fr)
Inventor
何兰
Original Assignee
何兰
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 何兰 filed Critical 何兰
Publication of WO2019019238A1 publication Critical patent/WO2019019238A1/zh

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/08—Manufacture of cast-iron

Definitions

  • the invention relates to a production process of a cast iron material, in particular to a production process of white cast iron.
  • White cast iron is a kind of important wear-resistant material with a wide range of applications. It has excellent wear resistance due to the high hardness of M 7 C 3 type carbides present in its structure, and the carbides are distributed in a rod shape. The toughness of white cast iron has improved. The presence of a large amount of chromium-containing hard phase M 7 C 3 carbide in high chromium white cast iron strongly enhances the wear resistance of the material. Therefore, it is widely used in phosphorus chemical industry, non-ferrous smelting, cement, thermal power generation, mining wear parts (such as crusher hammer, hammer head, crocodile board, ball mill liner, etc.).
  • High-chromium white cast iron refers to white cast iron with a Cr content of 12-28%.
  • the Cr content is selected in a wide range.
  • alloy elements such as Mo and Cu are usually added. After the workpiece is cast and cleaned, a heat treatment process of quenching and tempering is usually employed. Therefore, optimizing the production process of white cast iron, that is, rationally selecting the content of alloying elements and improving the heat treatment process to improve its service life, has important economic and social benefits.
  • the object of the present invention is to provide a production process of white cast iron which can be used to manufacture agitating blades of a concrete mixer, which can improve the strength of the stirring blade and prolong the service life of the stirring blade.
  • a white cast iron production process including Cr, Mo, Cu, Mn metal elements, Cr, Mo, Cu, Mn mass fraction of 15-26Cr, 0.8-1.4Mo, 0.4-0.8Cu, 0.2-0.5Mn.
  • the rare earth silicon alloy is used for the modification treatment in the casting process, and the heat treatment process of the casting is performed by the austempering process.
  • the rare earth silicon alloy is used for the metamorphism treatment, and the rare earth silicon alloy has a mass fraction of 0.3-0.6.
  • the white cast iron production process disclosed by the invention comprises the following steps:
  • the pig iron is heated to melt in a medium frequency induction electric furnace. After the molten iron is melted, a rare earth silicon alloy of 0.2-0.5% by weight of molten iron is added to the ladle, and Cr, Mo, Cu, Mn metal elements are sequentially added. Further melting;
  • the molten iron is poured into a ladle containing a small-sized rare earth silicon alloy for deterioration and slag removal. deal with;
  • the molten iron is poured into a water glass sand type or a lost mold sand type casting, that is, a high chromium white cast iron is obtained.
  • the invention has the beneficial effects that the (Cr,Fe) 7 C 3 carbide formed by the white cast iron produced by the production process disclosed by the invention has high hardness, small size, and the degree of continuity is remarkably lowered, and the cutting effect on the substrate is greatly Reduced, thus increasing the service life. According to the needs of users, it is reasonable to determine the Cr content of cast iron, not only to meet the requirements of the use of the workpiece, but also to reduce production costs and rational use of resources.
  • the rare earth silicon alloy is added to the molten iron of the white cast iron, and the rare earth plays a metamorphic role in the solidification and crystallization of the molten iron, so that the size of the carbide becomes smaller, the shape tends to be bald, and the distribution tends to be isolated.
  • the metamorphism of rare earth can further improve the wear resistance of white cast iron.
  • a production process of white cast iron including Cr, Mo, Cu, Mn metal elements, Cr, Mo, Cu, Mn mass fractions are respectively 15-26Cr, 0.8-1.4Mo, 0.4-0.8Cu, 0.2- 0.5Mn
  • the rare earth silicon alloy is used for metamorphism in the casting process.
  • the heat treatment process of the casting adopts the austempering process.
  • the rare earth silicon alloy is used for the modification process in the casting process.
  • the rare earth silicon alloy has a mass fraction of 0.3-0.6, and the heat treatment process of the casting adopts the isothermal quenching process.
  • the quenching heating temperature is 1050 ° C, controlled at an isothermal temperature of 280-360 ° C, and after cooling to room temperature after 0.8-1.5 h.
  • the production process includes the following steps:
  • the pig iron is heated to melt in a medium frequency induction electric furnace. After the molten iron is melted, a rare earth silicon alloy of 0.2-0.5% by weight of molten iron is added to the ladle, and Cr, Mo and Cu metal elements are sequentially added to be further added. Melt
  • the molten iron is poured into a ladle containing a small-sized rare earth silicon alloy, and subjected to deterioration and slag removal treatment;

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

一种白口铸铁的生产工艺，该白口铸铁可以用来制造混凝土搅拌机的搅拌叶片，包括Cr、Mo、Cu、Mn金属元素，Cr、Mo、Cu、Mn质量分数分别为15-26Cr，0.8-1.4Mo，0.4-0.8Cu，0.2-0.5Mn，铸造过程中采用稀土硅合金进行变质处理，铸件热处理工艺采用等温淬火工艺，该高铬白口铸铁可以用来制造混凝土搅拌机的搅拌叶片，可以提高搅拌叶片的强度，延长搅拌叶片的使用寿命。

Description

一种白口铸铁的生产工艺 技术领域
本发明涉及铸铁材料的生产工艺，具体地说，是一种白口铸铁的生产工艺。
背景技术
白口铸铁是一类应用非常广泛的重要耐磨材料，由于其组织中大量存在的高硬度M7C3型碳化物而具有优良的耐磨性，同时该碳化物呈杆状分布而较其它白口铸铁的韧性有所改善。高铬白口铸铁中大量存在的含铬的硬质相M7C3型碳化物有力提高了材料的磨损抗力。因此广泛用于磷化工、有色冶炼、水泥、火力发电、矿山的耐磨件(如破碎机板锤、锤头、鳄板、球磨机衬板等)。
高铬白口铸铁是指含Cr量在12-28％之间的白口铸铁，其Cr含量选择的范围较宽，为了提高其使用性能，通常会加入Mo、Cu等合金元素。工件铸造成型并清理后，通常采用淬火加回火的热处理工艺。因此，优化白口铸铁的生产工艺，即合理地选择合金元素的含量和改进热处理工艺，提高其使用寿命，有着重要的经济效益和社会效益。
发明内容
本发明的目的是提供一种白口铸铁的生产工艺，该白口铸铁可以用来制造混凝土搅拌机的搅拌叶片，可以提高搅拌叶片的强度，延长搅拌叶片的使用寿命。
为了实现上述目的，本发明采用的技术方案如下：
一种白口铸铁的生产工艺，包括Cr、Mo、Cu、Mn金属元素，Cr、Mo、Cu、Mn质量分数分别为15-26Cr，0.8-1.4Mo，0.4-0.8Cu，0.2-0.5Mn。
本发明的进一步改进，铸造过程中采用稀土硅合金进行变质处理，铸件热处理工艺采用等温淬火工艺所述铸造过程中采用稀土硅合金进行变质处理，所述稀土硅合金质量分数为0.3-0.6。
本发明披露的白口铸铁生产工艺包括以下步骤：
(1)根据白口铸铁的质量分数要求确定Cr、Mo、Cu、Mn金属元素的质量比，确定它们的配比关系，并进行配料；
(2)在浇包中加入铁水质量的0.2-0.5％重量的稀土硅合金，稀土硅合金破碎成小块状待用；
(3)将生铁在中频感应电炉中加热至熔化，待铁水熔清后，在铁水包中加入铁水质量的0.2-0.5％重量的稀土硅合金，依次加入Cr、Mo、Cu、Mn金属元素加入再进一步熔清；
(4)采用铝丝脱氧后，将铁水倒入存有小块状的稀土硅合金的浇包内，进行变质、除渣 处理；
(5)当铁水温度为1050℃时，将铁水浇入水玻璃砂型或消失模砂型浇注成型，即得到高铬白口铸铁。
本发明的有益效果：采用本发明披露的生产工艺生产出来的白口铸铁形成的(Cr，Fe)7C3碳化物硬度高，而且尺寸小，连续程度显著降低，对基体的切割作用大为减少，因而提高使用寿命。根据用户的需求，合理地确定铸铁的Cr含量，不仅可以满足工件的使用要求，同时也降低生产成本，合理利用资源。
在白口铸铁的铁水中加入稀土硅合金，稀土在铁水凝固结晶时发挥变质作用，使碳化物尺寸变小，形状趋于秃钝，分布趋于孤立化。稀土的变质作用能进一步提高白口铸铁的耐磨性。
具体实施方式
为了加深对本发明的理解，下面将结合实施例对本发明做进一步详细描述，该实施例仅用于解释本发明，并不对本发明的保护范围构成限定。
实施例，一种白口铸铁的生产工艺，包括Cr、Mo、Cu、Mn金属元素，Cr、Mo、Cu、Mn质量分数分别为15-26Cr，0.8-1.4Mo，0.4-0.8Cu，0.2-0.5Mn，铸造过程中采用稀土硅合金进行变质处理，铸件热处理工艺采用等温淬火工艺，铸造过程中采用稀土硅合金进行变质处理，稀土硅合金质量分数为0.3-0.6，铸件热处理工艺采用等温淬火工艺，淬火加热温度为1050℃，控制在280-360℃等温温度，经过0.8-1.5h后冷却至室温。
在本实施例中，生产工艺包括以下步骤：
(1)根据白口铸铁的质量分数要求确定Cr、Mo、Cu金属元素的质量比，确定它们的配比关系，并进行配料；
(2)在浇包中加入铁水质量的0.2-0.5％重量的稀土硅合金，稀土硅合金破碎成小块状待用；
(3)将生铁在中频感应电炉中加热至熔化，待铁水熔清后，在铁水包中加入铁水质量的0.2-0.5％重量的稀土硅合金，依次加入Cr、Mo、Cu金属元素加入再进一步熔清；
(4)采用铝丝脱氧后，将铁水倒入存有小块状的稀土硅合金的浇包内，进行变质、除渣处理；
(5)当铁水温度为1050℃时，将铁水浇入水玻璃砂型或消失模砂型浇注成型，即得到高铬白口铸铁铁件；
(6)将高铬白口铸铁铁件放置在热处理炉内进行热处理，具体为：先淬火，热处理炉以 小于200℃/小时均匀升温至280-360℃保温，经过0.8-1.5h后出炉喷雾淬火或强制风冷至室温。以上显示和描述了本发明的基本原理、主要特征及优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (3)

  1. 一种白口铸铁的生产工艺，其特征在于，包括Cr、Mo、Cu、Mn金属元素，所述Cr、Mo、Cu、Mn质量分数分别为15-26Cr，0.8-1.4Mo，0.4-0.8Cu，0.2-0.5Mn。
  2. 根据权利要求1所述的白口铸铁的生产工艺，其特征在于，铸造过程中采用稀土硅合金进行变质处理，铸件热处理工艺采用等温淬火工艺所述铸造过程中采用稀土硅合金进行变质处理，所述稀土硅合金质量分数为0.3-0.6。
  3. 根据权利要求1或2所述的白口铸铁的生产工艺，其特征在于，生产工艺包括以下步骤：
    (1)根据权利要求1所述的白口铸铁的质量分数要求确定Cr、Mo、Cu、Mn金属元素的质量比，确定它们的配比关系，并进行配料；
    (2)在浇包中加入铁水质量的0.2-0.5％重量的稀土硅合金，稀土硅合金破碎成小块状待用；
    (3)将生铁在中频感应电炉中加热至熔化，待铁水熔清后，在铁水包中加入铁水质量的0.2-0.5％重量的稀土硅合金，依次加入Cr、Mo、Cu、Mn金属元素加入再进一步熔清；
    (4)采用铝丝脱氧后，将铁水倒入存有小块状的稀土硅合金的浇包内，进行变质、除渣处理；
    (5)当铁水温度为1050℃时，将铁水浇入水玻璃砂型或消失模砂型浇注成型，即得到高铬白口铸铁。
PCT/CN2017/098428 2017-07-28 2017-08-22 一种白口铸铁的生产工艺 WO2019019238A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710632491.5 2017-07-28
CN201710632491.5A CN107299178A (zh) 2017-07-28 2017-07-28 一种白口铸铁的生产工艺

Publications (1)

Publication Number Publication Date
WO2019019238A1 true WO2019019238A1 (zh) 2019-01-31

Family

ID=60134532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/098428 WO2019019238A1 (zh) 2017-07-28 2017-08-22 一种白口铸铁的生产工艺

Country Status (2)

Country Link
CN (1) CN107299178A (zh)
WO (1) WO2019019238A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299178A (zh) * 2017-07-28 2017-10-27 何兰 一种白口铸铁的生产工艺
CN110819882A (zh) * 2018-08-08 2020-02-21 马鞍山市晓春模具材料有限公司 一种适用于汽车轮毂模具的新型复合材料

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1039267A (zh) * 1989-07-17 1990-01-31 冶金工业部钢铁研究总院 耐磨高铬铸铁
CN101177758A (zh) * 2007-12-03 2008-05-14 施伟晶 一种耐磨合金铸铁改性材料及其制造磨板毛坯铸件的方法
CN101503013A (zh) * 2009-03-11 2009-08-12 湖南欧克新材料有限公司 一种高铬铸铁复合耐磨材料及生产工艺
CN101613826A (zh) * 2009-07-11 2009-12-30 祁阳宇晖机电实业有限公司 制作低速碾压式破碎机衬板用的高铬抗磨白口铸铁
CN102330016A (zh) * 2011-09-16 2012-01-25 昆明市宜良化工设备铸造厂 一种亚共晶高铬白口铸铁及其制备方法
WO2013073821A1 (en) * 2011-11-14 2013-05-23 Lg Electronics Inc. Alloy cast iron and manufacturing method of rolling piston using the same
CN107299178A (zh) * 2017-07-28 2017-10-27 何兰 一种白口铸铁的生产工艺

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1039267A (zh) * 1989-07-17 1990-01-31 冶金工业部钢铁研究总院 耐磨高铬铸铁
CN101177758A (zh) * 2007-12-03 2008-05-14 施伟晶 一种耐磨合金铸铁改性材料及其制造磨板毛坯铸件的方法
CN101503013A (zh) * 2009-03-11 2009-08-12 湖南欧克新材料有限公司 一种高铬铸铁复合耐磨材料及生产工艺
CN101613826A (zh) * 2009-07-11 2009-12-30 祁阳宇晖机电实业有限公司 制作低速碾压式破碎机衬板用的高铬抗磨白口铸铁
CN102330016A (zh) * 2011-09-16 2012-01-25 昆明市宜良化工设备铸造厂 一种亚共晶高铬白口铸铁及其制备方法
WO2013073821A1 (en) * 2011-11-14 2013-05-23 Lg Electronics Inc. Alloy cast iron and manufacturing method of rolling piston using the same
CN107299178A (zh) * 2017-07-28 2017-10-27 何兰 一种白口铸铁的生产工艺

Also Published As

Publication number Publication date
CN107299178A (zh) 2017-10-27

Similar Documents

Publication Publication Date Title
CN103014550B (zh) 高铬多元合金耐磨球及其制造方法
CN100455378C (zh) 一种高铬白口耐磨铸铁的制造方法
CN103817312B (zh) 一种耐磨复合衬板及其制备方法
CN103014480B (zh) 多元微合金化低铬白口铸铁磨球及其制造方法
CN104498813A (zh) 一种耐热性液压扳手活塞用材料及其制备方法
CN106191642B (zh) 一种反击式破碎机用高铬合金耐磨衬板及其制备方法
CN105525190A (zh) 一种灰铸铁及其制造方法
CN104057066B (zh) 一种双金属双液复合锤头的制备方法
CN100408189C (zh) 中铬含钨复合抗磨辊圈的制造方法
CN104962802A (zh) 一种凸轮轴用孕育剂及其制备方法和应用
CN105369122A (zh) 一种炼铁高炉布料器溜槽衬板及其制备方法
CN107779781A (zh) 一种选矿球磨机衬板制造方法
WO2019019238A1 (zh) 一种白口铸铁的生产工艺
CN106609334B (zh) 一种超高铬铸铁及其制备方法
CN105671418A (zh) 一种高铬铸铁的新型制备方法
CN105177404A (zh) 一种微铜合金高抗磨铸球及其加工工艺
CN105401063A (zh) 一种离心铸造生产的铸态可锻铸铁气缸套及其生产工艺
CN105316586A (zh) 一种顽石破碎机高锰钢衬板及其制备方法
CN105506438A (zh) 一种新型合金铸铁的生产工艺
CN107022713B (zh) 一种防腐耐磨铬铜合金铸铁及其制备方法
CN104141096A (zh) 一种锤式破碎机合金锤头及其制备方法
CN106086607A (zh) 一种高铬白口铸铁的生产工艺
CN107760978A (zh) 一种白口铸铁的生产工艺
CN104561751A (zh) 一种高耐磨液压扳手活塞用材料及其制备方法
CN104073733A (zh) 一种耐空气腐蚀合金钢材料及其制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17919236

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17919236

Country of ref document: EP

Kind code of ref document: A1