1、 l :2009-11-28; null null :2010-03-17Te:fnull (1979- null ), 2 , =, V.1V Y Z T.Email: FOUNDRY TECHNOLOGYVol.31 No.5May 2010%ap q d/ s张null 良( 2= F !(“v)K / , 2 2473006)K1:针对酯固化碱性酚醛自硬树脂砂条件下生产的铸钢件产生的气孔,根据气孔特征和分布状况,分析了导致气孔在铸造过程中形成的诸多因素b通过采取合理的铸造工艺措施和严格生产过程管理,降低了气孔发生的概率,避免因严重气孔缺陷导致铸件报废,提高了铸件质量b1oM:酯固化酚醛
2、树脂砂;铸钢件;气孔ms |:TG245null nullDS M :A null nullcI|:1000-8365(2010)05-0544-03Blowhole Control Technology of Steel Castings Producedby Ester Solidify Phenol Resin Bond Sand ProcessZHANGLiang(RGPetro-machinery(Group) Co., Ltd., Nanyang473006, China)Abstract: For control the blowhole of steel castings pr
3、oduced by ester solidify phenol resin sandprocess, according to its features and distribution situation, the present paper analyzes the factorswhich cause the formation of blowhole. By means of properly design casting technology and strictmanagement of the production process, the probability of blow
4、hole formation was reduced, thatavoided casting rejection and improved quality of castings.Key words: Eeas-t cured phenolic system ( Ecp) ; Steel casting; Blowholesnull null “/_? a a s 3Z ?Z, M , Pap 1 3q 9F y,A U b j M1,ap 1 b ajV ;a aTr q b %ap 1 + 1 M1, ? ( m11000 null? wL, | = 3T4F ),c,yNq 3 d _
5、 l, Pap 1 3 MBHW =, |n ,q 3 d J,v ql, v6 b TV Yap 1 3T,ap 1 3 q 3 dCSe1sbm1null+1 ? wLFig.1null Curve of gas evolution rateof several kind of self-hardeningsands1null 3Hq12t25t / , CO2 j , m, Py !A , ? V1bV1nullA / Tab.1null Technical parameterof siliconsandSiO2 xc c C c y # h null97.5% null85% null
6、 0.3% null 0.3% null 0.2% null 1.3 null 0.3% 2.0 3.5mLnull null 25%, 3 75%,p F 1.6%,%4F 25%b MWT5 28 nullb g, g*C15 40mm,null10null544nullnullnull/ null05/2010nullfnull :%ap q d/ snull20mmY db/1 PZ Qbv q 1000kg/,8q b aV ?p 2 3Rb (24 hF )0. 25 0. 28 MPa,# h 2.2%2.6%b !5ta Vb2null d # 8 s2.1null 侵入性气孔
7、ap 3q S d ,8q d1s gWq , q d1“ gq , d 81 /+Z b2.1.1null# h T4Y , 3 # h null 1.5% z,7 L= 3_V , 3 # h v2. 2%2.6%S, # h 9F9v ? ,m2 Ub7T4 9F,99F ? , m3 Ub9 i , E d J 3bm2null #h ? 1“Fig.2null Gas evolution rate as functions of content of usedsandm3null F ? 1“Fig.3null Relation of resin additions and gase
8、volution rate2.1.2null sY/ H, Q u, bW ( A, v H,Z Q ), AC$ AF ,V - Cr100 null B u =, s$F v , u? u,? u “ S A _,_ C100 null ub N sy, s u,N usc Vr S sc 2 3, s W b#byN, s u? u _ p,E d,V74 ? u 8 ,9F 8 S AB1bap “dv T, A 6 8 H, AV i“ , .T9v, S 8E, “ gv$ , gq 9F, P 8_ gW “,KqV /V “ db2.1.3null g A g*i P H, g
9、 s/$ ,vs 8$ ,7qZ_ 8S A, “d T0 T, 8 g/Z “AT9v,7T = B,KVC d,C g/Zq=b2.1.4null j s j , H, d Jb j i8,7 8CO2b24h,A 8V, s S A,i A Q H, 8 “q ,q = dCW db2.2null 析出型气孔ap cNaSaP ,ASaPc e0.03%/,iy d, V Aay A3 8,g V ?q 3 s db2.3null 反应性气孔q 3 d J,y 8 HA b A % H ,yN 4 , “b %A -AM,yN “%A _qw, -AM 3a CO 7 d J, dbN,
10、qV M() 3V d9 Q db y, MVl ; MV ;p ? V, MC d Jbnull545nullnullFOUNDRY TECHNOLOGYVol.31 No.5May 20103nullE d Jn (1)9 i b“ aM MA ) , b“Mb b TV p ,i2Z i, ME Q P, MT ;a b(4) b l , VWb 7F ,j v b,9 i ,7 O a%4 , 3; T8CO2 j ,Kz| bh)B !Y Y,L 8 y b(5) !“dbap , 7b T“d, ,“d P 0 5q,E 7 !“db(6)A 8b8 V B12a,y V Aa 3 8,A1 sb4null(1)ap 3q d Jd9V , d 1 S db(2)hl 3 # h , eT4F ,V7 ? b(3) ! a d, P 8# H b | b a a ,4 a i b(4) e V a Ma g*a“d ,E Tb ID1 null,C/q e J/ aSM.:S,2004.null546null
