65Mn 碳素结构钢是一个用途广泛的钢种，具有较高的综合力学性能，可用于锯片、弹簧、刀具等行业。唐山国丰热轧薄板厂生产的65Mn钢板，在下游用户由3． 5 mm 厚度冷轧3． 1 mm 时偶尔出现断裂现象，无法继续轧制。为此对钢卷产生缺陷的部位进行分析，结果得出冷轧开裂产生的关键原因是材料内部组织片状珠光体偏大，通过减少钢中夹杂物，有利于提高材料的塑性。
2 SHIYANFANGFA
( 1) HONGGUANJIANCE。CHAKANGANGJUANDUANLIEQINGKUANG，CAIJITUPIANJINXINGHONGGUANJIANCE。
( 2) JIAZAWUJIANCE。ZAIKAILIEBUWEIQUSHIYANGBINGDUIDUANMIANJINXINGPAOGUANG，JINXINGJIAZAWUPINGJI。
( 3) KAILIEDUANKOUXINGMAOHENENGPUFENXI。KAILIECHUQU10mm × 10 mm SHIYANG，JINXINGDIANJINGDUANKOUXINGMAOFENXI，BINGDUIDUANKOUJINXINGNENGPUCHENGFENFENXI。
( 4) JINXIANGFENXI。ZAIGANGJUANKAILIEBUWEIJIEQUJINXIANGSHIYANGMOZHI、PAOGUANG，ZAIJINXIANGXIANWEIJINGSHANGJINXINGJINXIANGGUANCHA。
( 5) LIXUEXINGNENGJIANCE。ZAI65Mn LENGYABANSHANGQU250mm × 25 mm LASHENSHIYANG，CEDINGSHIYANGDEKANGLAQIANGDU、QUFUQIANGDU、DUANMIANSHOUSUOLV。
3 JIEGUOYUTAOLUN
3． 1 HONGGUANJIANCE
GUANCHALENGYADIYIDAOCIKAILIEYANGBAN，DUANLIEQUEXIANZAIGANGBANBIANBU，QISHIFANGXIANGYUYAZHIFANGXIANGCHUIZHI，DUANLIEYANKUANDUFANGXIANG，SHENDUYUE200 mm CHUZONGXIANGKAILIE，CHENGWANYUEXING，BIANBUHENGLIE，KUANDU1 ～ 3 mm，SHENDU300mm ZUOYOU，LIEWENKUANDUROUYANKEJIAN。
CAILIAOZHONGDEJIAZAWUYINQIGANGDEGEXIANGYIXING，QIEYUJITIDEJIEHEXINGJIAOCHA，DUANLIEWANGWANGSHICONGTIAOZHUANGJIAZAWUYUJITIJIEMIANCHUCHANSHENGDEXIANWEILIEWENKAISHIDE。
( 2) ZUZHIZHONGZHUGUANGTIPIANJIANJUYUEDA，DUIWEICUOYUNDONGDEZUAIJIANXIAO，SUXINGBIANXINGKANGLIJIANXIAO，CAILIAODESUXINGYUEDI。
( 3) TONGGUOYOUHUALF GAICHULIGONGYI，BAOZHENGJIAZAWUCHONGFENBIANXING，BAOZHANGRUANCHUISHIJIAN，SHIJIAZAWUCHONGFENSHANGFU; JIAQIANGLIANZHUQUANCHENGBAOHUJIAOZHU，BAOZHENGJIAOZHUGUOCHENGWENDINGXING，FANGZHIZHONGJIANBAOJIJIEJINGQIYEMIANBODONGZAOCHENGJUANZHA，YINGXIANGGANGSHUICHUNJINGDU。TONGSHIJIANGDIZHONGYAWENDUHEJUANQUWENDU，YOUXIAODITIGAOLECAILIAODESUXING，GAISHANLECHANPINZHILIANG，CHEDIXIAOCHULELENGYALIEWENXIANXIANG。http://jledai.com
