1、管桁架铸钢件铸造模型尺寸应考虑铸件的收缩量，砂必须采用优质砂。为保证铸件表面光滑、不粘砂，砂型应用干燥型或自硬型。

  2、ZHUZAOGANGSHUIYINGCHONGFENJINGLIANCHUNJING，JINLIANGJIANSHAOFEIJINSHUJIAZAWU，YINGCONGLUZHONGQUYANGJINXINGHUAXUECHENGFENFENXI，BAOZHENGGANGSHUIZHILIANG。

  3、YINGCAIYONGGAOQIANGDUDENAIHUOYOUZHUANZUOSHAOKOUXITONG，BINGBAOZHENGGANGSHUINENGSHUNLININGGUHECHONGFENDEBUGUAN，FANGZHIJIAOZHUXITONGZHONGDEXINGSHABOLUOERSHIZHUJIANJIASHA。

  4、JIAOZHUWANCHENGDEZHUJIANYINGZHUJIANLENGQUE，BIMIANYOUYUZHUJIANYINGLIHUOJUBULENGQUECHANSHENGDEREYINGLISHIZHUJIANBIANXINGHUOKAILIE。CHAIXIANGHOUYINGQUANMIANQINGSHA，QUCHUMAOKOU、FEIJIANDENGFUSHUWU。

  5、管桁架铸钢件清砂后，必须经整体退火处理，以消除铸造应力，整形或缺陷修补后再经正火加回火处理。正火处理过程中，保温时间不少于

  6、GUANHENGJIAZHUGANGJIANBUYUNXUYOULENGLIE、RELIE、BAIDIAN（FALIE）HERECHULILIEWENCUNZAI。RUYOULIEWENYINGCHANCHUHANBU，QICHANXUESHENDUHECHANXUEMIANJIDAXIAOBIXUMANZURUXIAYAOQIU：ZAIZHIZUO、JIEDIANZHUYAOSHOULIBUWEIJIQIZHOUWEI50mmFANWEINEI，JINGCHANXUEHOUQUEXIANMIANJIBUCHAOGUOGAIMIANJIDE10%，DUANMIANJIANRUOBUCHAOGUO10%。