文档介绍：9SiCr钢的热处理工艺与组织性能之间的关系
摘要:试验通过将9SiCr试件进行不同的热处理工艺,比较处理后得到组织的性能。首先取6个9SiCr试件,分别进行正火、退火、淬火处理;并将其中三个淬火件在不同温度下(150℃、450℃、550℃)进行回火处理。逐个对处理后的试件进行硬度测量,并对硬度值进行比较分析。打磨剖光后观察显微组织,对比分析不同热处理方式对材料组织性能的影响。9SiCr钢在900℃加热温度下正火,得到珠光体组织;在800℃下进行退火处理得到珠光体组织硬度下降塑性韧性增强;在850℃下进行淬火处理得到板条马氏体,具有较高的硬度和较好的韧性;淬火后的试件在150℃下进行回火处理,得到回火马氏体,部分消除了淬火钢的内应力,增加韧性,同时仍保持钢的高硬度;在450℃下进行回火处理,得到回火屈氏体,为铁素体与粒状渗碳体组成的极细混合物,具有很好的弹性和一定的韧性;在550℃下进行回火处理,得到回火索氏体,为铁素体与较粗的粒状渗碳体所组成的机械混合物,具有良好的综合机械性能。
关键词:9SiCr钢正火退火淬火回火马氏体
The influence of different heat treating fashion anization and properties of 9SiCr steel
Abstract: The experiment is contrast the function after the different heat treating to the 9SiCr .In the first place, prepare six 9SiCr samples, normalization、annealing and quench, then take three of the quenching samples heat in different temperature. Measure the hardness of the samples, and then contrastive analysis. Observe anizations after polish, contrastive and analysis the influence by different heat treatment. 9SiCr steel normalizating under 900℃,get the pearlite. Annealing under 800℃,get the pearlite, the hardness descend and the plasticity and tenacity heighten. Quenching under 850℃,get martensite ,high hardness and highe the quenching samples under 150℃,get martensite,partly eliminate the internal stress, increase the tenacity and keep the steel’s high hardness. Backfire under 450℃,get tempered troostite ,high elasticity and tencity. Backfire under 550℃,get sorbite have fine machinery function.
Key word:9SiCr steel normalization annealing quench backfire marrensite
目录
...........................................................5
9SiCr钢概况.....................................................5
9SiCr钢的组织特点及其合金元素对钢的作用...................5
9SiCr 钢的性能特点及其热处理工艺..........................6
第二章. 实验过程.....................................................8
原材料及设备...................................................8
实验过程...........................................