四川11选5走势图

 
 
 
 

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铸铁焊接平台铸件热处理的必要性

文章出处:http://allveer.com责任编辑:品冠量具人气:1703发表时间:2017-10-07 09:04:48
 

 铸铁焊接平台铸件热处理的必要性

  焊接平台四川11选5走势图铸件的热处理只能改变其基体组织,不能改变石墨的形态和分布,即热处理不能显著改善热处理淬火材料铸铁的力学性能。热处理主要用来消释铸铁焊接平台铸件的内应力,稳定尺寸,消释白口组织和提高铸铁焊接平台铸件的表面性能。

四川11选5走势图  1、ZHUTIEHANJIEPINGTAIZHUJIANDEQUYINGLITUIHUO

  铸铁焊接平台铸件在铸造冷却过程中,由于各部位冷却速度不同,容易产生内应力,可能导致铸铁焊接平台铸件翘曲和裂纹,因此为保证尺寸稳定和防止变形开裂,对一些形状复杂的铸件,如床身、汽缸体、汽缸盖等,需进行消释内应力退火(又称人工时效)。其规范一般为:去应力退火通常的加热温度为500~550℃保温时间为2~8h,然后炉冷(灰口铁),采用这种工艺可消释铸铁焊接平台铸件内应力的90~95%,但铸铁组织不发生变化。若温度超过550℃或保温时间过长,反而会引起石墨化,使铸铁焊接平台铸件强度和硬度降低。

  2、消释焊接平台铸件白口、降低硬度退火

  XIAOSHIZHUTIEHANJIEPINGTAIZHUJIANBAIKOUTUIHUOYOUCHENGWEIGAOWENSHIMOHUATUIHUO。ZHUTIEHANJIEPINGTAIZHUJIANBIAOCENGJIYIXIEBOJIEMIANCHU,ZAILENGNINGGUOCHENGZHONGLENGQUESUDUJIAOKUAI,RONGYICHANSHENGBAIKOUZUZHI,SHIZHUTIEHANJIEPINGTAIZHUJIANDEYINGDUHECUIXINGZENGJIA,ZAOCHENGQIEXUEJIAGONGKUNNAN、YIBOLUO,YINCIYINGGAICAIYONGTUIHUO(HUOZHENGHUO)DEFANGFAXIAOSHIBAIKOUZUZHI。TUIHUOGONGYIWEI:JIAREDAO550-950℃BAOWEN2~5 h,SUIHOULULENGDAO500—550℃ZAICHULUKONGLENG。ZAIGAOWENBAOWENQIJIAN,YOUGAOSHENTANTIHEGONGJINGSHENTANTIFENJIEWEISHIMOHEA,ZAISUIHOUHULENGGUOCHENGZHONGERCISHENTANTIHEGONGXISHENTANTIYEFENJIE,FASHENGSHIMOHUAGUOCHENG。YOUYUSHENTANTIDEFENJIE,DAOZHIYINGDUXIAJIANG,CONGERTIGAOLEQIEXUEJIAGONGXING。

  3、BIAOMIANCUIHUO

四川11选5走势图  YOUXIEZHUJIAN,RUJICHUANGZHUJIANDEDAOGUIBIAOMIAN、QIGANGZHUJIANNEIBIDENGXUYAOTIGAOBIAOMIANYINGDUJINAIMOXING,CHANGJINXINGBIAOMIANCUIHUOCHULI。CHANGYONGDEFANGFAYOUGAO(ZHONG)PINGANYINGJIAREBIAOMIANCUIHUOJIEZHI,HAIKECAIYONGHUOYANJIARE,JIGUANGJIARE,DENGLIZIJIAREHEDIANJIECHUJIAREDENGXINXINGBIAOMIANCUIHUOFANGFA。HANJIEPINGTAI,ZHUTIEHANJIEPINGTAI,ZHUTIERECHULIGONGYI,RECHULIZHUYAOYONGLAIXIAOSHIZHUTIEPINGBANZHUJIANDENEIYINGLI,WENDINGCHICUN,XIAOSHIBAIKOUZUZHIHETIGAOZHUTIEHANJIEPINGTAIZHUJIANDEBIAOMIANXINGNENG.HANJIEPINGTAICAIZHIYIBANWEIHT200HUOHT250,ZHEILIANGZHONGCAIZHIZHANDAOHANJIEPINGTAICAIZHIDE98%YISHANG,JINENGMANZUHANJIEGONGJIANSHIDEYAOQIU,ZAIJIAGESHANGYIBANYONGHUDOUNENGJIESHOU,WULUNSHIHANJIEPINGTAIDEKANGLALI、YINGDU、NAIMOCHENGDUJUNNENGMANZUHANJIEYAOQIU。HANJIEPINGTAIMAOPIZHUZAOFENWEISHUZHISHAZAOXINGHESHUINISHAZAOXING,XIANZAIDAXINGZHUTIEJIANYIBANCAIYONGZHEILIANGZHONGZAOXINGFANGFA,JUNWEIXIAOSHIMOZHUZAO,SHUZHISHAZAOXINGDUOYONGYUDAXINGJICHUANGZHUJIANHEHANJIEPINGTAIZHUZAO,JIAGEFANGMIANYAOGAOYUSHUINISHAZAOXINGDEZHUJIAN,80%DEHANJIEPINGTAICAIYONGSHUINISHAZAOXINGJINXINGZHUZAOZHUJIAN,ZHEIYANGJINENGMANZUHANJIEPINGTAIJISHUCANSHUDEYAOQIU,YOUNENGJIANGDIHANJIEPINGTAIDEZHIZAOCHENGBEN,SHIDADUOSHUCHANGJIAZHIZAOHANJIEPINGTAISHIYONGDEGONGYILIUCHENG。

 
 
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