{"title":"烧结后处理对Mn-Mo钢组织和力学性能的影响","authors":"C. Fiał","doi":"10.1515/pmp-2017-0011","DOIUrl":null,"url":null,"abstract":"Abstract The effect of heat treatment on density, hardness, microstructure and tensile properties of Fe-0.85Mo-1.3Mn-0.6C sintered steel were investigated. Pre-alloyed Astaloy 85Mo, ferromanganese and UF4 graphite powders were mixed for 60 minutes in a Turbula mixer and then pressed in single-action die at 660MPa to produce green compacts (according to PN EN ISO 2740).The compacts were sintered in a specially designed semi-closed container at 1120 or 1250°C for 60 minutes in N2. The chemical composition of the sintering atmosphere was modified by adding getter and/or activator into the container. Two different types of heat treatment in nitrogen were carried out: sinteraustempering at 525°C for 60 minutes; and sinterhardening with additional tempering at 200°C for 60 minutes. The slightly better combination of strength and plasticity of steel for both sintering temperatures were achieved after sinterhardening+tempering variant. Average values of 0.2% offset yield stress, ultimate tensile strength and elongation after sintering in 1250°C, were 415MPa, 700MPa, and 2.0%, respectively.","PeriodicalId":52175,"journal":{"name":"Powder Metallurgy Progress","volume":"17 1","pages":"104 - 111"},"PeriodicalIF":0.0000,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Effects of Post-Sintering Treatments on Microstructure and Mechanical Properties of Mn-Mo Steel\",\"authors\":\"C. Fiał\",\"doi\":\"10.1515/pmp-2017-0011\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract The effect of heat treatment on density, hardness, microstructure and tensile properties of Fe-0.85Mo-1.3Mn-0.6C sintered steel were investigated. Pre-alloyed Astaloy 85Mo, ferromanganese and UF4 graphite powders were mixed for 60 minutes in a Turbula mixer and then pressed in single-action die at 660MPa to produce green compacts (according to PN EN ISO 2740).The compacts were sintered in a specially designed semi-closed container at 1120 or 1250°C for 60 minutes in N2. The chemical composition of the sintering atmosphere was modified by adding getter and/or activator into the container. Two different types of heat treatment in nitrogen were carried out: sinteraustempering at 525°C for 60 minutes; and sinterhardening with additional tempering at 200°C for 60 minutes. The slightly better combination of strength and plasticity of steel for both sintering temperatures were achieved after sinterhardening+tempering variant. Average values of 0.2% offset yield stress, ultimate tensile strength and elongation after sintering in 1250°C, were 415MPa, 700MPa, and 2.0%, respectively.\",\"PeriodicalId\":52175,\"journal\":{\"name\":\"Powder Metallurgy Progress\",\"volume\":\"17 1\",\"pages\":\"104 - 111\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Metallurgy Progress\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1515/pmp-2017-0011\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Materials Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Metallurgy Progress","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/pmp-2017-0011","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Materials Science","Score":null,"Total":0}
引用次数: 0
摘要
摘要:研究热处理对Fe-0.85Mo-1.3Mn-0.6C烧结钢的密度、硬度、显微组织和拉伸性能的影响。预先合金的Astaloy 85Mo、锰铁和UF4石墨粉末在紊流混合器中混合60分钟，然后在660MPa的单作用模具中压制，以生产绿色压坯(根据PN EN ISO 2740)。在一个特殊设计的半封闭容器中，在1120或1250°C下，在N2中烧结60分钟。通过在容器中加入吸气剂和/或活化剂来改变烧结气氛的化学成分。在氮气中进行了两种不同的热处理:在525℃下烧结60分钟;在200°C下额外回火60分钟进行烧结硬化。在两种烧结温度下，钢的强度和塑性结合在烧结硬化+回火变体中均略好。1250℃烧结后，0.2%的偏置屈服应力、极限抗拉强度和伸长率的平均值分别为415MPa、700MPa和2.0%。
The Effects of Post-Sintering Treatments on Microstructure and Mechanical Properties of Mn-Mo Steel
Abstract The effect of heat treatment on density, hardness, microstructure and tensile properties of Fe-0.85Mo-1.3Mn-0.6C sintered steel were investigated. Pre-alloyed Astaloy 85Mo, ferromanganese and UF4 graphite powders were mixed for 60 minutes in a Turbula mixer and then pressed in single-action die at 660MPa to produce green compacts (according to PN EN ISO 2740).The compacts were sintered in a specially designed semi-closed container at 1120 or 1250°C for 60 minutes in N2. The chemical composition of the sintering atmosphere was modified by adding getter and/or activator into the container. Two different types of heat treatment in nitrogen were carried out: sinteraustempering at 525°C for 60 minutes; and sinterhardening with additional tempering at 200°C for 60 minutes. The slightly better combination of strength and plasticity of steel for both sintering temperatures were achieved after sinterhardening+tempering variant. Average values of 0.2% offset yield stress, ultimate tensile strength and elongation after sintering in 1250°C, were 415MPa, 700MPa, and 2.0%, respectively.
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