In simple terms, heat treatment is the process of heating the metal, holding it at that temperature, and then cooling it back. During the process, the metal part will undergo changes in its mechanical properties. This is because the high temperature alters the microstructure of the metal. And...
化学热处理 thermo-chemical treatment 将工件置于适当的活性介质中加热、保温,使一种或几种元素渗入工件的表层,以改变其化学成分、 组织结构与性能的热处理。 预备热处理 pre-heat treatment;conditioning treatment 为调整原始组织,保证工件最终热处理或(和)切削加工性能,预先进行的热处理。 真空热处理 vacuum heat tr...
FIELD: heat treatment of welded large-size articles such as connecting parts of pipelines or thick-wall large-diameter tubes of low carbon complex-alloy steel.;SUBSTANCE: tubular article is welded of shaped sheet blanks. Before hot shaping sheet blank is heated up to temperature Ac3 +(80 - ...
temperature and time, so that any process of heat treatment can be represented in temperature-time ( t-r ) coordinates.因此，热处理的主要因素是温度和时间，所以任何热处理⼯艺都以⽤温度-时间为坐标轴进⾏表⽰。热处理⼯艺主要有以下⼏个参数：加热温度t max ，既合⾦加热的最⾼温度；在...
Testing the parts “post process” will tell them whether or not the treatment has been successful, but there is a need to know before processing the parts to avoid unnecessary scrap and rework. The answer is to establish a scheme of testing for the equipment that ...
Any process of heat treatment can he described by a diagram in temperature-time coordinates . interrupt-中断stepwise-楼梯式的, 逐步的subzero- 零度以下的(温度) 2.1.2 formation of austenite - * - 根据Fe-C相图,在平衡临界点缓慢加热,珠光体转变为奥氏体。一般条件下,转变会延迟导致过热,即转变温度略...
lesson13-ch6-HeatTreatment_v1-讲义讲义 Today’s lecture: Heat Treatment of Metals Ageing or Precipitation Hardening Fine particles can also be formed that block dislocations from moving Involves Solution treatment to temperature above solvus line Quenching to room temperature to create supersaturated ...
1.Introductionofheattreatment2.AsimplifiedIron-carbonDiagram3.Hardening4.Tempering5.Annealing ASimplifiedIron-carbonDiagram简化铁碳状态图Ifwefocusonlyonthematerialsnormallyknownassteels,asimplifieddiagramisoftenused.如果只把注意力集中于一般所说的钢上，经常要用到简化铁碳状态...
SomeIssuesonHeattreatment 5.TTTcurve–principleforMartensiteFormation-eutectoidcomposition-preheatorheatupalloytoaustenite.-austenitetovariousphases:coolingrate.Pearlite,P;Bainite,B:alternativeformsofferrite-carbidemixturesMartensite,M Handouts27 Metals–PhasediagramforIronandCarbon Eutectic EutectoidFe3C Handouts2 8...
Thus the part designer/heat treatment practitioner can have a deliberate influence on the minimization of manufacturing costs and the optimization of product reliability and quality. SYSWELD is a powerful tool, which can be used to judge the heat treatment process on a geometry, and it can ...