CN106702253A - 一种锑钴镍‑硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法 - Google Patents
一种锑钴镍‑硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法 Download PDFInfo
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- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 6
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- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 5
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- B22F1/0003—
-
- 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
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
本发明涉及一种耐热铸铁用变质剂,具体涉及一种锑钴镍‑硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法,该复合变质剂以高热稳定、高比表面积、高强度、高韧性的多壁碳纳米管负载的纳米氮化铬,提高了纳米材料在熔液中的分散性和活性,能有效的形成非自发晶核,促进组织细化,而锑钴镍‑硅钙合金粉改善了传统硅钙变质剂的性能,提高了铸铁的抗热冲击稳定性和抗氧化能力;纳米材料与复合合金粉相互粘结负载,极大的提高了原料的利用率,该变质剂促进了铸铁的石墨化进程,有效改善耐热铸铁的综合力学性质,结构牢固细密,且较之传统变质剂使用更为便捷,生产成本更低。
Description
技术领域
本发明涉及一种耐热铸铁用变质剂,具体涉及一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法。
背景技术
耐热铸铁是指用于高温条件下的铸铁,国家标准中主要分为铬系、硅系和铝系三种类型的耐热铸铁,这类铸铁具有抗氧化、抗生长性能的性能,随着使用温度的增加,对现有的耐热铸铁使用性能要求更高,目前的耐热铸铁存在的问题主要表现在导热性差、抗热冲击性能差、高脆性、废品率高、使用寿命短等等,为了解决这些问题,在铸铁浇注前采取有效的变质处理显得尤为重要,目前采用鹅变质剂为硅、铝、钙、铜、钛、铌以及稀土等合金元素作为变质剂,以细化晶核,增加晶核数量,促进石墨球化,提高致密度,改善高温机械性能,然而在实际使用时存在原料利用率低,生产成本高等因素的制约,近年来兴起利用纳米材料作为变质剂,然而由于纳米材料的结构特点,其在熔体中的分散性差,容易漂浮,需要辅助专门的喷射装置,提高了生产成本。
发明内容
本发明的目的在于,制备一种由纳米材料与合金元素混合负载的新型变质剂,减少贵重合金元素的使用量,同时简单无损的改善纳米材料在熔体中分散性,提高各原料的利用率,改善耐热铸铁机械性能,为了实现上述目的,本发明提供一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法,采用的技术方案如下:
一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法,其特征在于,该变质剂由以下重量份的原料制成:钨酸钙1-2、氟化钠1-2、蛇纹石尾矿微粉2-3、三氧化二铋0.4-0.5、纳米氮化铬1-2、多壁碳纳米管2-3、锑粉1-2、钴粉2-4、镍粉1-3、硅钙合金粉5-8、浓度为10-12%的乙醇水溶液25-30、磷酸二氢镁1-2、助剂0.5-1。
所述的助剂由以下重量份的原料制成:不锈钢纤维微粉2-3、硅锶孕育剂4-5、浓度为20-30%的PAG淬火液3-5、木质素磺酸钠0.5-0.8、氧化锰1-3、偏硼酸钙0.8-1、有机膨润土2-3、水12-15,制备方法为:先将木质素磺酸钠、偏硼酸钙溶于水中,随后在水溶液中投入有机膨润土,搅拌混合20-30min后研磨处理1-2h,得改性有机膨润土均浆,随后再将其它剩余物料加入有机膨润土均浆中,继续搅拌混合2-3h,即得掺杂不锈钢纤维微粉的增强增韧复合孕育助剂。
所述的一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂的制备方法为:
(1)先将蛇纹石尾矿微粉、三氧化二铋、锑粉、钴粉、镍粉与硅钙合金粉混合均匀后投入电炉中,熔融后浇注成型,随后将所得合金破碎,过300-400目筛,得合金粉备用;
(2)将纳米氮化铬与多壁碳纳米管混合,投入10-15重量份的乙醇水溶液中,密闭高速搅拌混合8-12h,得多壁碳纳米管负载复合纳米材料的复合浆料备用;
(3)将步骤(1)所得的合金微粉、步骤(2)所得浆料与其它剩余成分混合,在密闭环境中进行二次搅拌,混合浆料高速搅拌混合12-18h后热风干燥,完全除去水份,破碎成细粉状,即得。
与现有技术相比,本发明复合变质剂以高热稳定、高比表面积、高强度、高韧性的多壁碳纳米管负载的纳米氮化铬,提高了纳米材料在熔液中的分散性和活性,能有效的形成非自发晶核,促进组织细化,而锑钴镍-硅钙合金粉改善了传统硅钙变质剂的性能,提高了铸铁的抗热冲击稳定性和抗氧化能力;纳米材料与复合合金粉相互粘结负载,极大的提高了原料的利用率,该变质剂促进了铸铁的石墨化进程,有效改善耐热铸铁的综合力学性质,结构牢固细密,且较之传统变质剂使用更为便捷,生产成本更低。
具体实施方式
实施例
本实施例变质剂由以下重量份原料制成:钨酸钙1.2、氟化钠1.6、蛇纹石尾矿微粉2、三氧化二铋0.4、纳米氮化铬1.8、多壁碳纳米管3、锑粉1.8、钴粉、镍粉3、硅钙合金粉6、浓度为12%的乙醇水溶液28、磷酸二氢镁1.6、助剂0.8。
所述的助剂由以下重量份的原料制成:不锈钢纤维微粉3、硅锶孕育剂4.5、浓度为25%的PAG淬火液4、木质素磺酸钠0.6、氧化锰2、偏硼酸钙0.8、有机膨润土2、水14,制备方法为:先将木质素磺酸钠、偏硼酸钙溶于水中,随后在水溶液中投入有机膨润土,搅拌混合30min后研磨处理1.5h,得改性有机膨润土均浆,随后再将其它剩余物料加入有机膨润土均浆中,继续搅拌混合3h,即得掺杂不锈钢纤维微粉的增强增韧复合孕育助剂。
所述的一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂的制备方法为:
(1)先将蛇纹石尾矿微粉、三氧化二铋、锑粉、钴粉、镍粉与硅钙合金粉混合均匀后投入电炉中,熔融后浇注成型,随后将所得合金破碎,过400目筛,得合金粉备用;
(2)将纳米氮化铬与多壁碳纳米管混合,投入13重量份的乙醇水溶液中,密闭高速搅拌混合10h,得多壁碳纳米管负载复合纳米材料的复合浆料备用;
(3)将步骤(1)所得的合金微粉、步骤(2)所得浆料与其它剩余成分混合,在密闭环境中进行二次搅拌,混合浆料高速搅拌混合15h后热风干燥,完全除去水份,破碎成细粉状,即得。
本实施例以RTCr16为例,使用方法为:在RTCr16制造过程中使用包底冲入法分别加入0.40wt%、0.60wt%、0.80wt%的变质剂,变质处理后的铸液浇注出试样,试样尺寸均为Φ30mm×300mm,且分别标记为1、2、3,这三种不同变质剂含量的试样各自力学性能测试结果如下:
编号 | 1 | 2 | 3 |
抗拉强度 | 615MPa | 633MPa | 658MPa |
布氏硬度 | 405HB | 430HB | 455HB |
伸长率 | 7.0% | 9.2% | 11.2% |
氧化速率(850℃×100h) | 2.6g/m2.h | 1.6g/m2.h | 0.8g/m2.h |
生长率 | 3.8% | 2.2% | 1.2% |
Claims (2)
1.一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法,其特征在于,该变质剂由以下重量份的原料制成:钨酸钙1-2、氟化钠1-2、蛇纹石尾矿微粉2-3、三氧化二铋0.4-0.5、纳米氮化铬1-2、多壁碳纳米管2-3、锑粉1-2、钴粉2-4、镍粉1-3、硅钙合金粉5-8、浓度为10-12%的乙醇水溶液25-30、磷酸二氢镁1-2、助剂0.5-1;
所述的助剂由以下重量份的原料制成:不锈钢纤维微粉2-3、硅锶孕育剂4-5、浓度为20-30%的PAG淬火液3-5、木质素磺酸钠0.5-0.8、氧化锰1-3、偏硼酸钙0.8-1、有机膨润土2-3、水12-15,制备方法为:先将木质素磺酸钠、偏硼酸钙溶于水中,随后在水溶液中投入有机膨润土,搅拌混合20-30min后研磨处理1-2h,得改性有机膨润土均浆,随后再将其它剩余物料加入有机膨润土均浆中,继续搅拌混合2-3h,即得掺杂不锈钢纤维微粉的增强增韧复合孕育助剂。
2.如权利要求1所述的一种锑钴镍-硅钙合金负载纳米氮化铬的耐热铸铁用复合变质剂及其制备方法,其制备方法为:
(1)先将蛇纹石尾矿微粉、三氧化二铋、锑粉、钴粉、镍粉与硅钙合金粉混合均匀后投入电炉中,熔融后浇注成型,随后将所得合金破碎,过300-400目筛,得合金粉备用;
(2)将纳米氮化铬与多壁碳纳米管混合,投入10-15重量份的乙醇水溶液中,密闭高速搅拌混合8-12h,得多壁碳纳米管负载复合纳米材料的复合浆料备用;
(3)将步骤(1)所得的合金微粉、步骤(2)所得浆料与其它剩余成分混合,在密闭环境中进行二次搅拌,混合浆料高速搅拌混合12-18h后热风干燥,完全除去水份,破碎成细粉状,即得。
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CN105349885A (zh) * | 2015-10-15 | 2016-02-24 | 芜湖市宝艺游乐科技设备有限公司 | 一种高导热易切削抛光的预硬型塑料模具钢及其制备方法 |
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CN103757516A (zh) * | 2014-01-09 | 2014-04-30 | 北京工业大学 | 耐磨白口铸铁及其制备方法 |
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