Ndeipi mhedzisiro yekunyanyisa inoculation yesimbi castings

1. Migumisiro yekunyanyisa inoculation yesimbi castings

1.1 Kana iyo inoculation yakawandisa, iyo silicon yemukati ichave yakakwirira, uye kana ikadarika imwe kukosha, silicon brittleness ichaonekwa.Kana iyo yekupedzisira yesilicon yemukati ichipfuura mwero, inozotungamira mukukora kweA-type graphite;iyo inowanzoita shrinkage uye shrinkage, uye huwandu hwematrix F huchawedzera;pachavawo neparera shoma.Kana pane imwe ferrite, simba richaderera panzvimbo.

1.2 Yakawandisa inoculation, asi iyo yekupedzisira silicon yemukati haipfuure mwero, nyore kugadzira shrinkage cavities uye shrinkage, chimiro chinonatswa, uye simba rinovandudzwa.

1.3 Kana huwandu hweinoculation hwakanyanya, kunaya kwe graphite kunoderera panguva yekusimba, kuwedzera kwesimbi yakakandwa kunoderera, kuwedzera kwemapoka eutectic kunokonzera kusadya zvakanaka, uye shrinkage yemvura ichave yakakura, zvichikonzera shrinkage. porosity.

1.4 Kuwedzera inoculation ye nodular iron ichawedzera nhamba ye eutectic clusters uye kuwedzera maitiro ekusunungura, saka kune huwandu hunonzwisisika hweinoculation.Izvo zvinodikanwa kuti uone kana huwandu hwemasumbu eutectic hwakanyanya kudiki kana yakakura kwazvo pasi pe metallography, ndiko kuti, pasi pekumanikidzwa Nei uchiteerera huwandu hweinoculum, uye chikonzero nei inoculum ye hypereutectic ductile iron yakakura kwazvo ichakonzera graphite. kuyangarara.

2. Inoculation nzira yesimbi castings

2.1 Ductile iron shrinkage inowanzokonzerwa nekunonoka kutonhora nekukurumidza uye kwenguva yakareba yekusimbisa nguva, iyo inotungamira kune graphite kukanganisa pakati pekukanda, kuderedzwa nhamba yemabhora, uye mabhora makuru egraphite.Huwandu hwemagesium yakasara, kudzora huwandu hwepasi risingawanzo, wedzera trace elements, kusimbisa inoculation uye mamwe matanho etekinoroji.

2.2 Paunenge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge nazvo mu ductile iron, iyo silicon yemukati yesimbi yakanyungudutswa yakaderera, iyo inokupa iwe mamiriro ekuwedzera inoculation.Huwandu hweinoculation hunowedzerwa nevanhu vakasiyana hunogona kunge hwakasiyana.Zvakanaka, asi zvakare hazvina kukwana.

3. Nhamba yeinoculant yakawedzerwa kune iron castings

3.1 Basa reinoculant: kukurudzira graphitization, kuvandudza kugoverwa kwechimiro uye ukuru hwe graphite, kuderedza tsika yekuchenesa, uye kuwedzera simba.

3.2 Nhamba yeinoculant yakawedzerwa: 0.3% muhomwe, 0.1% muhutu, 0.4% muhuwandu.