What are the main reasons that affect the deformation of ukucima imvamisa ephezulu?

Izici ezithinta ukuguqulwa kokwelashwa kokushisa kokucisha i-high-frequency quenching ikakhulukazi zihlanganisa isakhiwo sokuqala sensimbi, okuqukethwe kwekhabhoni, usayizi nokuma kwezingxenye, ukukhethwa kwendawo yokucisha, inqubo yokucisha, kanye nokuqina kwensimbi.

1. The effect of carbon content in steel on the deformation of parts during quenching heat treatment. Medium and high carbon steels are prone to cracking during overheating quenching. In order to place deformation and cracking, hypereutectoid steels usually use incomplete quenching to obtain cryptocrystalline martensite, which is not easy to produce microcracks. .

2. The hardenability of steel also has a certain influence on the deformation of parts during quenching heat treatment. The hardenability of steel is closely related to the critical cooling rate of the steel. The lower the critical cooling rate, the better the hardenability of the steel. The main factor to reduce the critical cooling rate is the chemical composition of the steel. Steel with good hardenability can use a moderate quenching medium during quenching and cooling to reduce the deformation and cracking tendency of the workpiece during quenching. Therefore, for important parts with complex shapes and large sections, good hardenability should be selected. alloy steel. After serving and tempering, the required mechanical properties can be obtained and the deformation and cracking can be reduced.

3. Umthelela wesakhiwo sokuqala sensimbi ekucimeni kwe-deformation yezingxenye. I-microstructure yezingxenye ezicishiwe inethonya elikhulu kwikhwalithi yokucisha yezingxenye. Isibonelo, insimbi ye-alloy, insimbi enensimbi, njll. kumele ibe-spheroidized annealed ngemva kokufoja. Ngesikhathi sokucisha nokushisa, okusanhlamvu kwe-austenite akulula ukukhula. I-deformation kanye nokuqhekeka kwe-workpiece kuncane, usayizi wokusanhlamvu wangaphakathi wento ucolisa kakhulu, amandla esivuno aphezulu, futhi ukumelana nokuguquguquka okukhulu, futhi ukuwohloka kwe-workpiece ngemva kokucisha kuyancishiswa ngokufanayo.

1. Umphumela wokucisha i-medium ku-deformation yezingxenye ngesikhathi sokucisha ukwelashwa kokushisa. Ngokuvamile kunenkolelo yokuthi ithonya lezinga lokupholisa le-300 ° C ekucimeni liyisihluthulelo, futhi indawo yokucisha kufanele ikhethwe ngokufanele ngokuvumelana nokuqina kwensimbi, usayizi we-cross-sectional wengxenye. kanye nobukhulu obuphezulu, kanye nokuma kwejometri yengxenye kuthinta ukuguqulwa kokucisha kwengxenye. , Ngokombono wenqubo yokwelashwa kokushisa, umklamo wengxenye ungcono kakhulu ukusebenzisa isakhiwo esivumelanayo, umphathi ugwema amakhona abukhali, futhi udinga isigaba somfaniswano ngokweqile. Uma kunesidingo, i-groove yenqubo ingavulwa. Ngakho-ke, izinto zokwakha kufanele zikhethwe ngokunengqondo ukuze kugwenywe ukucisha imifantu.