CN108994309A - 一种烧结硬化用水雾化合金粉末及其制造方法 - Google Patents

一种烧结硬化用水雾化合金粉末及其制造方法 Download PDF

Info

Publication number
CN108994309A
CN108994309A CN201811009162.6A CN201811009162A CN108994309A CN 108994309 A CN108994309 A CN 108994309A CN 201811009162 A CN201811009162 A CN 201811009162A CN 108994309 A CN108994309 A CN 108994309A
Authority
CN
China
Prior art keywords
powder
sinter
reduction
water mist
alloy powder
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201811009162.6A
Other languages
English (en)
Inventor
李江
王洋
修凤玲
卜福昌
纪向军
高扬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Heavy Machinery Co Ltd
Original Assignee
Angang Heavy Machinery Co Ltd
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 Angang Heavy Machinery Co Ltd filed Critical Angang Heavy Machinery Co Ltd
Priority to CN201811009162.6A priority Critical patent/CN108994309A/zh
Publication of CN108994309A publication Critical patent/CN108994309A/zh
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/16Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/08Ferrous alloys, e.g. steel alloys containing nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • B22F2009/0828Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0848Melting process before atomisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

本发明提供了一种烧结硬化用水雾化合金粉末的制造方法,该方法包括冶炼、雾化、还原、扩散工序,在冶炼的过程中,向钢液内加入Mo,然后通过扩散工艺,将Mn、Ni扩散至含Mo合金铁粉上;在还原和扩散工序之间增加混料工序,具体为:将还原后的铁钼粉经过破碎、筛分、合批,然后加入占铁钼粉质量0.1%~1.0%的油性粘接剂,再加入Ni粉、Mn粉,混料机转速控制10~20r/min,混料时间控制30~90min,制成半成品,再将混合均匀的半成品经还原炉扩散。本发明改善产品强度、韧性及表观硬度等综合性能。

Description

一种烧结硬化用水雾化合金粉末及其制造方法
技术领域
本发明涉及粉末冶金领域,尤其涉及一种烧结硬化用水雾化合金粉末及其制造方法。
背景技术
烧结硬化工艺是粉末冶金零件生产的一种新工艺,其目的是在保证粉末冶金制品强度、韧性和表观硬度的同时,降低制品零件烧结后二次处理工艺,缩短生产周期,降低生产成本。采用的是烧结—快冷的生产工艺。选择合适的合金元素,能有效地提高材料的淬硬性,使制品在经过一系列热处理过程中发生马氏体相变,同时又具有一定的韧性。该水雾化合金粉可有效地提高粉末冶金制品综合机械性能,并能保证粉末的烧结尺寸稳定性。
目前,为实现烧结硬化效果,常常往钢铁粉末中添加Ni、Mo、Mn粉末,其存在:运输及混粉过程中,合金元素会产生偏析;压制密度偏低及强度、硬度也偏低。
发明内容
本发明的目的是提供一种烧结硬化用水雾化合金粉末及其制造方法,改善产品强度、韧性及表观硬度等综合性能。
为了达到上述目的,本发明采用以下技术方案实现:
一种烧结硬化用水雾化合金粉末的制造方法,该方法包括冶炼、雾化、还原、扩散工序,在冶炼的过程中,向钢液内加入Mo,然后通过扩散工艺,将Mn、Ni扩散至含Mo合金铁粉上;在还原和扩散工序之间增加混料工序,具体为:将还原后的铁钼粉经过破碎、筛分、合批,然后加入占铁钼粉质量0.1%~1.0%的油性粘接剂,再加入Ni粉、Mn粉,混料机转速控制10~20r/min,混料时间控制30~90min,制成半成品,再将混合均匀的半成品经还原炉扩散。
所述的冶炼工序具体为:以废钢、生铁为主要原料,通过电炉的冶炼得到成分均匀稳定、杂质少的钢液,钢液中Mo的含量按0.5wt%~4.0wt%调整,出钢温度:1620~1800℃。
所述的雾化工序具体为:雾化压力:10~15Mpa,雾化开始温度:1580~1700℃、雾化结束温度:1550℃~1630℃、钢液流直径14~28mm、流量140~240m3/h、喷射角度30°~50°。
所述的还原工序是将雾化后的粉料经过还原炉进行还原,还原炉还原预热段温度550℃~800℃、长度4~6m,高温段温度800℃~1000℃、长度6~12m,冷却段温度500℃~800℃、长度4~8m;氨气流量60~190m3/h,运行速度:90~300㎜/min,料层厚度:12~48㎜。
所述的扩散工序是将混合均匀的半成品经还原炉扩散,还原炉扩散预热段温度650℃~750℃、长度2~4m;高温段温度750℃~900℃,长度4~14m;冷却段温度450℃~750℃,长度4~8m。氨气流量60~190m3/h,控制扩散时间30~90min,料层厚度:20~35mm。
所述的油性粘接剂为机油。
一种烧结硬化用水雾化合金粉末,其化学成分按重量百分比组成如下:C:0.001%~0.2%;Si≤0.50%;Mn:0.1%~1.0%;P≤0.050%;S≤0.030%;Mo:0.5%~4.0%;Ni:0.1%~8.0%,其余为Fe及不可避免的杂质。
与现有技术相比,本发明的有益效果是:
1)压缩性(600MPa下):≥7.02g/cm3
2)以扩散的形式将Mn引入合金体系,避免冶炼及雾化过程时,Mn元素的氧化,而且使得合金元素在制品烧结过程中能进一步完全合金化;
3)运输及混料过程不会产生合金元素成分的偏析,烧结尺寸性稳定,显微组织均匀。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步说明:
一种烧结硬化用水雾化合金粉末的制造方法,该方法包括冶炼、雾化、还原、扩散工序,在冶炼的过程中,向钢液内加入Mo,然后通过扩散工艺,将Mn、Ni扩散至含Mo合金铁粉上;在还原和扩散工序之间增加混料工序,具体为:将还原后的铁钼粉经过破碎、筛分、合批,然后加入占铁钼粉质量0.1%~1.0%的油性粘接剂,再加入Ni粉、Mn粉,混料机转速控制10~20r/min,混料时间控制30~90min,制成半成品,再将混合均匀的半成品经还原炉扩散。
所述的冶炼工序具体为:以废钢、生铁为主要原料,通过电炉的冶炼得到成分均匀稳定、杂质少的钢液,钢液中Mo的含量按0.5wt%~4.0wt%调整,出钢温度:1620~1800℃。
所述的雾化工序具体为:雾化压力:10~15Mpa,雾化开始温度:1580~1700℃、雾化结束温度:1550℃~1630℃、钢液流直径14~28mm、流量140~240m3/h、喷射角度30°~50°。
所述的还原工序是将雾化后的粉料经过还原炉进行还原,还原炉还原预热段温度550℃~800℃、长度4~6m,高温段温度800℃~1000℃、长度6~12m,冷却段温度500℃~800℃、长度4~8m;氨气流量60~190m3/h,运行速度:90~300㎜/min,料层厚度:12~48㎜。
所述的扩散工序是将混合均匀的半成品经还原炉扩散,还原炉扩散预热段温度650℃~750℃、长度2~4m;高温段温度750℃~900℃,长度4~14m;冷却段温度450℃~750℃,长度4~8m。氨气流量60~190m3/h,控制扩散时间30~90min,料层厚度:20~35mm。
所述的油性粘接剂为机油。
一种烧结硬化用水雾化合金粉末,其化学成分按重量百分比组成如下:C:0.001%~0.2%;Si≤0.50%;Mn:0.1%~1.0%;P≤0.050%;S≤0.030%;Mo:0.5%~4.0%;Ni:0.1%~8.0%,其余为Fe及不可避免的杂质。
实施例合金粉末化学成份及各项指标见表1:
表1
对比镍、钼、锰不同添加工艺下粉末冶金制品综合性能见表2
1)钼完全合金化+Ni、Mn添加机油混合后扩散(本发明工艺)
2)钼完全合金化+Ni、Mn扩散(这个是对比文件的工艺)
3)钼完全合金化+Ni、Mn混合(这个是普通工艺)
通过上述比较,本发明在强度、硬度、冲击强度等方面明显优于其他方式生产的合金粉。
表2

Claims (7)

1.一种烧结硬化用水雾化合金粉末的制造方法,该方法包括冶炼、雾化、还原、扩散工序,在冶炼的过程中,向钢液内加入Mo,然后通过扩散工艺,将Mn、Ni扩散至含Mo合金铁粉上;其特征在于,在还原和扩散工序之间增加混料工序,具体为:将还原后的铁钼粉经过破碎、筛分、合批,然后加入占铁钼粉质量0.1%~1.0%的油性粘接剂,再加入Ni粉、Mn粉,混料机转速控制10~20r/min,混料时间控制30~90min,制成半成品,再将混合均匀的半成品经还原炉扩散。
2.根据权利要求1所述的一种烧结硬化用水雾化合金粉末的制造方法,其特征在于,所述的冶炼工序具体为:以废钢、生铁为主要原料,通过电炉的冶炼得到钢液,钢液中Mo的含量按0.5wt%~4.0wt%调整,出钢温度:1620~1800℃。
3.根据权利要求1所述的一种烧结硬化用水雾化合金粉末的制造方法,其特征在于,所述的雾化工序具体为:雾化压力:10~15Mpa,雾化开始温度:1580~1700℃、雾化结束温度:1550℃~1630℃、钢液流直径14~28mm、流量140~240m3/h、喷射角度30°~50°。
4.根据权利要求1所述的一种烧结硬化用水雾化合金粉末的制造方法,其特征在于,所述的还原工序是将雾化后的粉料经过还原炉进行还原,还原炉还原预热段温度550℃~800℃、长度4~6m,高温段温度800℃~1000℃、长度6~12m,冷却段温度500℃~800℃、长度4~8m;氨气流量60~190m3/h,运行速度:90~300㎜/min,料层厚度:12~48㎜。
5.根据权利要求1所述的一种烧结硬化用水雾化合金粉末的制造方法,其特征在于,所述的扩散工序是将混合均匀的半成品经还原炉扩散,还原炉扩散预热段温度650℃~750℃、长度2~4m;高温段温度750℃~900℃,长度4~14m;冷却段温度450℃~750℃,长度4~8m。氨气流量60~190m3/h,控制扩散时间30~90min,料层厚度:20~35mm。
6.根据权利要求1所述的一种烧结硬化用水雾化合金粉末的制造方法,其特征在于,所述的油性粘接剂为机油。
7.一种如权利要求1所述的方法制造的烧结硬化用水雾化合金粉末,其特征在于,其化学成分按重量百分比组成如下:C:0.001%~0.2%;Si≤0.50%;Mn:0.1%~1.0%;P≤0.050%;S≤0.030%;Mo:0.5%~4.0%;Ni:0.1%~8.0%,其余为Fe及不可避免的杂质。
CN201811009162.6A 2018-08-31 2018-08-31 一种烧结硬化用水雾化合金粉末及其制造方法 Pending CN108994309A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811009162.6A CN108994309A (zh) 2018-08-31 2018-08-31 一种烧结硬化用水雾化合金粉末及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811009162.6A CN108994309A (zh) 2018-08-31 2018-08-31 一种烧结硬化用水雾化合金粉末及其制造方法

Publications (1)

Publication Number Publication Date
CN108994309A true CN108994309A (zh) 2018-12-14

Family

ID=64591165

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811009162.6A Pending CN108994309A (zh) 2018-08-31 2018-08-31 一种烧结硬化用水雾化合金粉末及其制造方法

Country Status (1)

Country Link
CN (1) CN108994309A (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112267003A (zh) * 2020-09-24 2021-01-26 山东鲁银新材料科技有限公司 一种超高洁净度、低氧、高性能水雾化纯铁粉的制备方法
CN112410658A (zh) * 2020-09-24 2021-02-26 山东鲁银新材料科技有限公司 一种高强度、高硬度水雾化预合金钢粉的制备方法
CN113649559A (zh) * 2021-08-03 2021-11-16 鞍钢(鞍山)冶金粉材有限公司 一种粉末冶金用直齿轮混合铁粉及制备方法
WO2021248980A1 (zh) * 2020-06-10 2021-12-16 鞍钢(鞍山)冶金粉材有限公司 一种粉末冶金用含铜铁粉及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047933A (en) * 1976-06-03 1977-09-13 The International Nickel Company, Inc. Porosity reduction in inert-gas atomized powders
CN1410197A (zh) * 2002-11-25 2003-04-16 莱芜钢铁集团粉末冶金有限公司 扩散型合金钢粉的制造方法
CN1644280A (zh) * 2004-01-23 2005-07-27 杰富意钢铁株式会社 粉末冶金用铁基混合粉
CN101658930A (zh) * 2009-09-03 2010-03-03 建德市嘉鑫金属粉材有限公司 一种高压缩性烧结硬化用水雾化钢铁粉及生产方法
CN102101174A (zh) * 2009-12-16 2011-06-22 鞍钢重型机械有限责任公司 水雾化扩散合金粉及其制造方法
CN104550925A (zh) * 2014-12-25 2015-04-29 佛山市盈峰粉末冶金科技有限公司 一种制作铁基结构件用的含锰粉末冶金材料及其制备方法
JPWO2017047101A1 (ja) * 2015-09-18 2017-09-14 Jfeスチール株式会社 鉄基焼結体およびその製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047933A (en) * 1976-06-03 1977-09-13 The International Nickel Company, Inc. Porosity reduction in inert-gas atomized powders
CN1410197A (zh) * 2002-11-25 2003-04-16 莱芜钢铁集团粉末冶金有限公司 扩散型合金钢粉的制造方法
CN1644280A (zh) * 2004-01-23 2005-07-27 杰富意钢铁株式会社 粉末冶金用铁基混合粉
CN101658930A (zh) * 2009-09-03 2010-03-03 建德市嘉鑫金属粉材有限公司 一种高压缩性烧结硬化用水雾化钢铁粉及生产方法
CN102101174A (zh) * 2009-12-16 2011-06-22 鞍钢重型机械有限责任公司 水雾化扩散合金粉及其制造方法
CN104550925A (zh) * 2014-12-25 2015-04-29 佛山市盈峰粉末冶金科技有限公司 一种制作铁基结构件用的含锰粉末冶金材料及其制备方法
JPWO2017047101A1 (ja) * 2015-09-18 2017-09-14 Jfeスチール株式会社 鉄基焼結体およびその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周兰花: "《冶金原理》", 31 October 2016 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021248980A1 (zh) * 2020-06-10 2021-12-16 鞍钢(鞍山)冶金粉材有限公司 一种粉末冶金用含铜铁粉及其制备方法
CN112267003A (zh) * 2020-09-24 2021-01-26 山东鲁银新材料科技有限公司 一种超高洁净度、低氧、高性能水雾化纯铁粉的制备方法
CN112410658A (zh) * 2020-09-24 2021-02-26 山东鲁银新材料科技有限公司 一种高强度、高硬度水雾化预合金钢粉的制备方法
CN112267003B (zh) * 2020-09-24 2022-05-03 山东鲁银新材料科技有限公司 一种超高洁净度、低氧、高性能水雾化纯铁粉的制备方法
CN113649559A (zh) * 2021-08-03 2021-11-16 鞍钢(鞍山)冶金粉材有限公司 一种粉末冶金用直齿轮混合铁粉及制备方法

Similar Documents

Publication Publication Date Title
CN108994309A (zh) 一种烧结硬化用水雾化合金粉末及其制造方法
JP6394768B2 (ja) 粉末冶金用合金鋼粉および焼結体
CA2911031C (en) Alloy steel powder for powder metallurgy and method of producing iron-based sintered body
CN103008649B (zh) 一种电动工具用混合粉及其制备方法
JP6146548B1 (ja) 粉末冶金用混合粉末の製造方法、焼結体の製造方法、および焼結体
CN102101174B (zh) 水雾化扩散合金粉及其制造方法
CA2922018C (en) Alloy steel powder for powder metallurgy and method of producing iron-based sintered body
JP5308123B2 (ja) 高強度組成鉄粉とそれを用いた焼結部品
CN102554216A (zh) 一种水雾化铁铜合金粉末及制造方法
CN108025357B (zh) 粉末冶金用混合粉、烧结体及烧结体的制造方法
JP2010090470A (ja) 鉄系焼結合金およびその製造方法
CN106077660A (zh) 一种粉末冶金制备发动机气门座的方法
CN111761051A (zh) 一种粉末冶金用含铜铁粉及其制备方法
JP6819624B2 (ja) 粉末冶金用鉄基混合粉末およびその製造方法ならびに引張強さと耐衝撃性に優れた焼結体
CN102373359A (zh) 一种汽车发动机专用合金钢粉的生产方法
JP5929084B2 (ja) 粉末冶金用合金鋼粉ならびに鉄基焼結材料およびその製造方法
CN110614380B (zh) 一种制备高均匀性的含钼、钨铁基粉末冶金零件的方法
CN108160987A (zh) 一种汽车用含磷混合铁粉及其制备方法
CN105772704A (zh) 一种含钨铁基粉末冶金材料及其制备方法
WO2019188833A1 (ja) 粉末冶金用合金鋼粉および粉末冶金用鉄基混合粉末
WO2018143088A1 (ja) 粉末冶金用混合粉、焼結体、および焼結体の製造方法
JPH0689363B2 (ja) 粉末治金用高強度合金鋼粉
JP2012126972A (ja) 粉末冶金用合金鋼粉ならびに鉄基焼結材料およびその製造方法
JPH0517801A (ja) 圧縮性の優れた拡散型低合金鋼粉の製造方法
WO2023157386A1 (ja) 粉末冶金用鉄基混合粉および鉄基焼結体

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20181214

RJ01 Rejection of invention patent application after publication