Njirimara nke mpịachi efere kwụ ọtọ CDH 1. Mwepụta ihe eji emepụta ọkọlọtọ maka ịwelite efere efere na akụkụ nchara. Usoro mkpọchi mkpọchi mkpọchi nke oge opupu ihe ubi na-emesi ike ike nke mbụ ike.
2. A na -ejikọ ihe nkedo nwere usoro nchekwa, na -ahụ na mgbachi ahụ anaghị amị amị mgbe etinyere ike yana mgbe eburu ibu.
3. A na -akpọchi mkpọchi akpọchi yana mepere emepe.
4. High frquency quenching nke die esorowo pụrụ iche alloy steels na -enye ukwuu anwụ ngwa ngwa ka cam.
Njirimara nke mgbachi efere kwụ ọtọ DHQ 1. Kwesịrị ekwesị maka ibuli na ibufe efere efere, ihe owuwu na ihe ngosi profaịlụ na positon kwụ ọtọ.
2.Emepụtara site na nchara carbon dị elu
3. Zere ịkwapụ ma ọ bụ ịkwanye ujo
4.The ibu ibu ịgba bụ kacha ibu na mwekota na -ikike na -akwado mgbe eji na abụọ na a na -ebuli n'akuku nke 60 °.
Na mbuli arụmọrụ clamps enwere ike iji ya abụọ ma ọ bụ ọtụtụ.