彈簧鋼英文版貴自己翻譯

1、GB/T 1222-2007 Heat treatment Section5.2 Smelting way Supplier can choose the smelting way except it has been indicated in the agreement. 5.3 Condition of delivery5.3.1 The steel can be heat treatment or none.If customer need steel is heat treatment condition which shouldbe indicated in order.5.3.2

2、As agreement in the order and note in the order,steel can be skinned,polishing or the other surface condition 5.4 Mechnical property5.4.1 The mechnical property testing can use 10mm diameter.If the casting have metal machining allowance(thediameter always 11 to 12 mm).After the heat treatment and ma

3、chining,check the longitudinal direction mechnicalproperty,the result should meet the table 2.To the diameter or the length side of bar is less than 11mm,use thenatural size steel. To the thickness of flat steel is less than 8mm,use rectangular figure to test .When it isrectangular figure,the reduct

4、ion of area cannt be consider one of reception condition.Table 2 Mechnical PropertyItemBrandbHeat treating regime Mechnical Property,minquenching/Mediumtemper/tensilestrength/(N/mm2)yield strength/(N/mm2)Elongation,mineductionarea/%A/%A11 3/%165840oil500980785935270830oil4801030835830385820oil480113

5、0980630465Mn830oil540980785830555SiMnVB860oil46013751225530660Si2Mn870oil48012751180525760Si2MnA870oil44015701375520860Si2CrA870oil42017651570620960Si2CrVA850oil410186016656201055SiCrA860oil4501450-17501300(Rp02)6251155CrMnA830-860oil460-51012251080(Rp02)9c201260CrMnA830-860oil460-52012251080(Rp02)9

6、c201350VrVA850oil5001275113010401460CrMnBA830-860oil460-52012251080(Rp02)9c201530W4CrVAd1050-1100oil60014701325720a Except the temperature of the heat treatment tolerance have been indicated,the tolerance of heat treatmenttemperature,quenching,20,temper,50.As the special require of temper by purchas

7、e,the termpertemperature can use 30.b the mechnical property of 28MnSiB as table 2.c The testing way can use one of below .If do the tensile test as GB/T 228,the elongation is only for reference.Sample 1 Gauge length is 50mm,parallel length is 60mm,diameter is 14mm,the radius of shoulder more than15

8、mm. Sample 1 Gauge length is 4 (S0 means the paeallel lengths original cross-sectional area ),theparallel length is 1.2 multiple of gauge length ,the radius of shoulder is more than 15mm. d Except the tensile strength of 30W4Cr2VA,all the other mechnical property is only for reference,cannt beused f

9、or condition of delivery.5.4.2 The mechnical property of table 2 can be used as for all diameter or length side of bar steel is less than80mm and the thickness of flat steel is less than 40mm.The diameter or the length of side is bigger than 80mmand the thickness of flat steel is more than 40mm.The

10、Elongation and Eduction area value in table can reduce1%(absolute value) and 5%(absolute value).5.4.3 The diameter or length side of bar steel is more than 80mm ,can change the semi-finished metal towrought(rolling) and the diameter or length side be 70mm to 80mm to take the sample,the checking resu

11、lt shouldmeet table 2.5.4.4 The coil rod always no need of Mechnical property checking.If purchaser need checking which should bediscussing between purchaser and saler.5.4.5 The condition of delivery use the hardness should meet table 3.If the saler can confirm is ok,then no needtest this item.Table

12、 3 Hardness of the deliveryGroup NO.BrandCondition of deliveryBrinell hardness,max165 70Hot rolling285285 65Mn302365Si2Mn,60Si2MnA,50CrVA,55SiMnVB,55CrMnA,60CrMnA321460Si2CrA,60Si2CrVA,60CrMnBA55SiCrA, 30W4Cr2VAHot rollingnegotiation betweenpurchaser and salerHot rolling+Heat treatment3215ALLCold dr

13、aw+Heat treatment3216Cold drawnegotiation betweenpurchaser and saler5.5 Hardenability5.5.1 55SiMnVB steel should do the hardenability testing.Recommend heat treating regime,normalizingtemperature 900 to 930,end quenching temperature 8605.Result should meet:The rockwell hardnessof 9mm,end distance sh

14、ould noe less than HRC52.If saler can confirm the hardenability is good,no need of thistesting5.5.2 As the agreement,can use the hardenability calculator way to instead the hardenability testing.Thehardenability calculator way can be discussed and decided by purchaser and saler.5.6 Macrostructure5.6

15、.1 The test block of steel-macroscopic examination by etching with strong mineral acids cannt haveshrinkage,air bubble,crack,inclusion,skull patch,white flake,corrosion cracking that can be seen.5.6.2 Macroscopic examination by etching should accord table 4Table 4 The accepted grade of Macrostructur

16、eIngot case segregationCenter porosityNormal porosityaccepted grade,less than2525255.6.3 If saler can confirm the Macrostructure is ok,can use supersonic test ot the other nondestructiveevaluation(NDE) way to instead.5.6.4 The SiMn spring steel after heat treatment which should check the nick and sh

17、ould no graphitic carbon onthe nick surface5.7 Non-metallic inclusion5.7.1 Accord the note of purchaser in the agreement,the Non-metallic inclusion of steel can be checked.Theaccepted grade should meet table 55.7.2 The Non-metallic inclusion can be accepted as the A testing way in the GB/T 10561 and

18、 as as the worstresult. Table 5 The accepted grade of non-metallic inclusionThe type of non-metallic inclusionAccepted grade,less thanexiguous seriesCoarse SeriesA2520B2520C2015D2015NOTE:If purchaser have the dimension inclusion and DS series which should be noted in the agreement.And theaccepted gr

19、ade are decided by purchaser and saler.5.8 Decarburized layer5.8.1 The depth of Decarburized layer in steel,every side should be less than the table 6(The flat steel shouldcheck Decarburized layer in the wider surface).5.8.2 If the steel as skinned,polishing condition of delivery and cannt have Deca

20、rburized layer on the surfaceTable 6 The depth of Decarburized layer in every side of surfaceBrandNominaldiameter,length ofside or depth/mmThe depth of Decarburized layer less than diameter or thickness,percent/%Hot-finished materialWrought materialCold drawrolledsteel,coil rodquadrant iron,flat ste

21、elSi spring steel82528Need discuss bypurchaser ans saler208-30202315301518-The otherspring steel8202315815181.05.9 Surface quality5.9.1 There are not crack,crease,rolling skin,inclusion,laminate and iron scale in the surface of hot rolling andwrought steel.The flat part of steel must be cleaned,when

22、 do the cleaning work,the surface of steel cannt bedamaged.After cleaning woek,the dimensions should be in the tolerance.The width of cleaning should dont lessthan 5 times as the depth.If there is little scratch,indentation which should be less than half of the actualdimension minus the nominal dime

23、nsion5.9.2 The surface of cold draw round steel should meet GB/T 3078.5.9.3 The skinned,polishing condition steel should be smoothness,bright,clean,hairline,crease,scratch,concave,rolling skin,rust-eaten and oxide skin etc outside defect.But the littlescratch,lubricating mark,helicoid which less tha

24、n the actual dimension minus the nominal dimension can beaccepted.5.10 Specific requirementThe inspection item and test ways of every batch steel should meet the requirement of table 7 .Inspection item,quantity,part of sample and test waysItemInspection wayQTYPart of sampleTest way1Chemical constitution(heat analysis)1/BatchGB/T 222GB/T 223,GB/T 43362Tensile2Different rolled steel,GB/T 2975GB/T 2283H