【宇恒答疑】退火的相关问题？

 JINRILAI，GONGSIXIAOSHOUDIANRESIDENGXIANGGUANCHANPINDESHIHOU，JINGCHANGHUIYONGDAO“TUIHUO”ZHEIGEGUANJIANCI，JINGCHANGYOUKEHUDUITUIHUOZHEIGEMINGCIBUSUANTAILEJIEHUOSHIGENBENJIUBUDONG，SUOYI，YANCHENGYUHENGDIANREKEJIYOUXIANGONGSITEDIZHENGLILE，KEHUGUANYUTUIHUODEYIXIEYIWEN，BINGHEDAJIAFENXIANG。

问题1：什么是退火，退火的定义？

DAYI：JIANGDIANRESIJIAREDAOSHIDANGWENDU，BAOCHIYIDINGSHIJIAN，RANHOUHUANMANLENGQUE（YIBANSUILULENGQUE）DERECHULIGONGXUCHENGWEITUIHUO。

TUIHUODEZHUYAOMUDE：

1、JIANGDIGANGDEYINGDU，TIGAOSUXING，YILIYUQIEXUEJIAGONGJILENGBIANXINGJIAGONG。

2、XIHUAJINGLI，JUNYUNGANGDEZUZHIJICHENGFEN，GAISHANGANGDEXINGNENGHUOWEIYIHOUDEDERECHULIZUOZHUNBEI。

3、XIAOCHUGANGZHONGDECANYUNEIYINGLI，YIFANGZHIBIANXINGHEKAILIE。

问题2：经过退火处理的电热丝为什么会变黑？

DAYI：YUHENGJISHURENWEISHIDIANRESIBIAOMIANYANGHUALE，SUOYIKANSHANGQUXIANGHEISE。

问题3：退火为什么能降低电热丝的硬度？

DAYI：TUIHUOHOUDEZUZHIZHUYAOSHIZHUGUANGTIZUZHI, XIANGDUIXIABEISHITIHEMASHITIDEYINGDUZEXIAOXIE.

问题4：为什么退火可以降低硬度？

DAYI：DIANRESIZAIJIAREXINGCHENGLEAOSHITI，GENJUMUDEDEBUTONG，ZIGAOWENHUANMANDIHUOKUAISUDILENGQUE，SHIZHIFASHENGZHUANBIAN。

AOSHITIZAIBUTONGDEWENDUZHUANBIANSHI，QIZHUANBIANCHANWUSHIBUXIANGTONGDE，XINGNENGYEYOUHENDADECHAYI。

HUANMANDELENGQUEDEDAOSHIYICENGSHENTANTIYICENGTIESUTIDEHUNHEWU——ZHUGUANGTI；ERKUAISULENGQUEDEDAODESHIMASHITI，ERAOSHITISHIMEIYOUYINGDUDE，ERMASHITISHIYOUYINGDUDE。RECHULIDECUIHUODEDAODEJIUSHIMASHITIZUZHI。