文档介绍：热解决工艺对30CrMnSiA组织与性能影响
学 科：材料成型及控制工程
本 科 生：康仕高 （签名）
指引教师：邹军涛 讲师 （签名）
摘 要
本文通过对30CrMnSiA复合钢进行不同工艺条件下热解决。研究30CrMnSiA在不同热解决状态及不同热解决温度下组织与性能转化状况。采用金相光学显微镜观测其显微组织，并用X射线衍射仪分析30CrMnSiA组织中物相变化，测量不同热解决条件下钢性能。研究成果表白：
(1)30CrMnSiA钢在1100℃-1160℃高温退火过程中，随着退火温度升高，钢组织中晶粒尺寸增大，但其硬度先下降后急剧上升。
(2)30CrMnSiA钢在820℃-880℃不同温度淬火解决条件下，硬度随着温度升高而逐渐升高，不同介质条件下淬火后，空冷后硬度较低而冷水淬火后硬度高达HRC50。
(3)30CrMnSiA钢在520℃回火解决下，组织中某些马氏体转变为奥氏体，钢硬度下降塑性上升。
核心词：高温退火，淬火，回火，30CrMnSiA钢，淬火介质
Effect of heat treatment on Microstructure and properties of 30CrMnSiA
Subject：material forming and control
Name： (Signature)
Supervisor：ZouJunTao (Signature)
Abstract
In this paper，through different heat treatment conditions on 30CrMnSiA composite steel. Transformation of the microstructure and properties of the different heat treatments and different heat treatment temperature of 30CrMnSiA. The microstructure was observed by means of optical microscope，X-ray diffraction analysis and 30CrMnSiA in phase change，measured in different heat treatment conditions the performance of steel. The results show that:
(1)30CrMnSiA steel at 1100 ℃ -1160 ℃ high temperature annealing process，with the increase of annealing temperature，the grain size in the structure of steel increases，but the hardness decreased first and then increased sharply.
(2) 30CrMnSiA steel at 820 ℃ -880 ℃ temperature quenching conditions，the hardness increases with the increase of temperature，different media conditions after quenching，air-cooled low hardness and water quenching hardness up to HRC50.
(3) 30CrMnSiA steel during tempering at 520 ℃，part of body to austenite martensite，hardness decreased plasticity increase.
Keywords：High-temperature annealing，quenching，tempering，30CrMnSiA steel，quenching mediu
第一章 前 言
所谓调质钢，-%中碳钢。普通用此类钢制作零