Te kowiri maitai

Te kowiri maitai
Tuhinga o mua
E ai ki nga tuhinga o te aorangi

E ai ki te whakaurunga huanga
Steel chromium (cr-fe-c), chromium-nickel rino (cr-ni-fe-c), Manganese maitai (MN-FE-C), Silicon-Manganese Steel (SI-MN-FE-FE-FE-FE
Rite ki te tauira iti te hanga i te hanganga ranei
Ko te kowiri tira, ko te martensite maitai, kowiri tira, Austete maitai, kowiri tira.
Kia rite ki te whakamahi
Ko te kowiri tira a Youloy, te kowiri taputapu, te kowiri maitai mahinga.
Ko te kowiri tira
Ko te ihirangi waro e tohuhia ana e te tau i te timatanga o te karaehe. It is stipulated that the carbon content is indicated by a number (two digits) in units of one ten-thousandth for structural steel and one digit (one digit) in units of one thousandth for tool steel and special performance steel, and the carbon content is not indicated when the carbon content of tool steel exceeds 1%.
Whai muri i te whakaatu i te ihirangi waro, ko te tohu matū o te huānga e whakamahia ana hei tohu i te waahanga nui o te kowiri. Ko te ihirangi e tohu ana i te nama kei muri. When the average content is less than 1.5%, no number is marked. When the average content is 1.5% to 2.49%, 2.5% to 3.49%, etc., 2, 3, etc. are marked accordingly.
Ko te kowiri maitai a te sheloy 40CR he ihirangi waro toharite o te 0.40%, a ko te ihirangi o te kaupapa matua a te Open Cr te iti iho i te 1.5%.

Ko nga papa motuhake e tohua ana me nga timatanga o nga Hainamana o a raatau whakamahinga. Hei tauira: te kowiri tira, kua tohua me te "G" i mua o te nama kowiri. GCr15 indicates ball bearing steel with a carbon content of about 1.0% and a chromium content of about 1.5% (this is a special case, the chromium content is expressed in a number of one thousandth). Y40Mn indicates free-cutting steel with a carbon content of 0.4% and a manganese content of less than 1.5%, etc. For high-quality steel, “A” is added to the end of the steel to indicate this, such as 20Cr2Ni4.
Tuhinga o mua
I muri i nga waahanga taapiri ka taapirihia ki te kowiri, nga waahanga taketake o te maitai, te rino me te waro, ka taunekeneke ki nga waahanga taapiri. The purpose of alloying steel is to improve the structure and properties of steel by utilizing the interaction between alloying elements and iron and carbon and the influence on the iron-carbon phase diagram and the heat treatment of steel.
Te taunekeneke i waenga i nga huanga me te rino me te waro
I muri i nga waahanga taapiri ka taapirihia ki te maitai, kei te taha o te kowiri i roto i nga momo e toru. Ko te: e hanga ana i te otinga totoka me te rino; te hanga i nga motuka me te haurau; me te hanga i nga pūhui takawaenga i roto i te rino teitei.

Ko te kowiri tira a Ally
Ko te maitai i whakamahia hei hanga i nga hanganga miihini me nga waahanga miihini e kiia ana ko te kowiri hanganga a te soloy. There are mainly low-alloy structural steel, alloy carburizing steel, alloy quenched and tempered steel, alloy spring steel, and ball bearing steel.
Ko te kowiri tira-a-aahua

2. Nga whakaritenga mahinga
(1) Te kaha o te kaha: Ko te tikanga, ko tona kaha hua kei runga ake i te 300mpa.
(2) Te taumaha teitei: Ko te elongation e hiahiatia ana kia 15% ki te 20%, ka nui ake te paanga o te pāmahana o te rūma ki te 600kj / m ki te 800kj / m. Mo nga waahanga nui, he nui ake te uaua o te uaua o te uaua.
(3) He pai te mahi i te mahi me te mahi makariri.
(4) Te pāmahana whakawhiti maroke makariri.
(5) te ātete tino pai.
3. Nga ahuatanga hanga
(1) Ko te waro iti: na te mea nui mo te uaua, te maara me te mahi makariri, kaore i te neke atu i te 0.20% te nui o te mahi waro.


Hei taapiri, ko te taapiri i te iti o te parahi (≤0.4%) me te ūkuikui (e pā ana ki te 0.1%) ka taea te whakapai ake i te aukati. Ko te taapiri i te iti o nga waahanga whenua onge ka taea te desulfurize me te tohu, horoia te maitai, ka pai ake te uaua me te tukatuka mahi.
4. Ko nga papaa hanga-a-papa-iti noa te whakamahi
16Katahi te mea e whakamahia ana, ko te kowiri tira i roto i te kowiri-a-kaha o taku whenua. The structure in use is fine-grained ferrite-pearlite, and the strength is about 20% to 30% higher than that of ordinary carbon structural steel Q235, and the atmospheric corrosion resistance is 20% to 38% higher.

When the strength level exceeds 500MPa, ferrite and pearlite structures are difficult to meet the requirements, so low-carbon bainite steel was developed. Adding elements such as Cr, Mo, Mn, and B is conducive to obtaining bainite structure under air cooling conditions, making the strength higher, and the plasticity and welding performance are also better. Kei te whakamahia te nuinga i roto i nga kaimoana-nui, ko nga ipu kaha-nui, etc.
5. Ko nga ahuatanga maimoatanga wera
Ko tenei momo maitai maitai e whakamahia ana i roto i te ahua o te hau-makariri-wera me te kore e hiahiatia te maimoatanga wera motuhake. Ko te microstructure i roto i te whenua whakamahi ko te Ferrite + Tumu te Ferrite + Tumu.