Ukuqinisekisa ukuba i-L245umbhobhoumbhobho wensimbi unamandla aphezulu okukhathala, amandla okuxininisa, ubunzima bomhlaba, kunye nobomi benkonzo obude, ukubandakanywa okungafaniyo kwe-metallic ezifana ne-oxide inclusions, i-sulfide inclusions, kunye ne-point inclusions kwintsimbi kufuneka ilawulwe ngokungqongqo Ngaphakathi koluhlu;i-inhomogeneity yee-carbides ezahlukeneyo kwintsimbi (efana ne-carbide liquefaction, i-strip carbide, i-band carbide, kunye ne-network carbide, njl.) kufuneka ilawulwe ngaphakathi kwinqanaba.

Ubunzima bomgca we-decarbonized phezu kwendawo yentsimbi egqityiweyo yokuthwala emva kokulungiswa okushushu kufuneka kuncitshiswe;i-macroscopic low-magnification structure yentsimbi kufuneka ikhululeke ngokubanzi.Iziko lilahlekelwa, kwaye inqanaba lokwahlula kufuneka libe lincinci.Amaqamza angaphantsi kwesikhumba, imingxunya ecuthekayo, i-Inclusions, kunye nokuqhekeka.Intsimbi ene-annealed iyadingeka ukuba ibe ne-uniform kunye ne-fine spherical pearlite structure.

1. Iimfuno zomphezulu

Ukuqinisekisa ukuba umphezulu we-bearing awunaziphene, umgangatho wemveliso yensimbi ethwele kufuneka ube lula kwaye ungabi naziphene ezifana nokuqhekeka, izibazi, ukugoqa, ukugoba, kunye nemikrwelo.

2. Iimfuno zobukhulu

Ekugqityweni kwentsimbi yokuthwala, ukusika ngokuchanekileyo izinto eziluhlaza kunye nokusetyenzwa kwinqanaba elifunekayo lenxalenye, ukuchaneka komgangatho wemveliso yensimbi yokuthwala nayo iyimfuneko ngokungqongqo, kwaye imilo yemveliso egqityiweyo nayo iyadingeka ukuba iqonde.