Surface Treatment Available For Molds

〔Technical Data〕

〔技術データ〕

Surface Treatments Available for Molds Plating Hard chrome Nickle 1 Phosphor

Procedure

Cr

Required time Thickness (μm) Incidence of strain Local coating Heat curing for hardening base metal Afterprocess

Nitriding Boriding Fe 2−3 N Fe 4 N

Ni-P

FeB Fe2 B

CVD PVD TRD Injection of Overlay Molten salt Fluidized solid molten metal Heat CVD Plasma CVD Ion platingbath methodfurnace method TiC,TiN TiC,TiN Amorphous TiN,CrN TiCN,W2 C carbon

①Heating ①Heating  in gas  in powder Electrolysis Dipping ②Dipping in ②Dipping in  molten salt Heating in in  molten salt in gas aqueous aqueous ③Dipping in solution solution ③Discharging  molten salt  in reduced ④Heating  pressure gas  in gas

Temperature of Surface 50∼80 base metal in ditto process（℃） Center 1∼5 20∼50 low possible before plating

Stellite VC,NbC VC,TiC Ni-Cr-B-Si and same Cr-C,VN Cr-C,TiCN Ni-Cr-B-Si-WC as the left.

①Re-melt Discharging In reduced ①Dipping in Heating in after spray fluidized in pressure   molten salt reduced nitrogen ②Electrolysis fluidized solid solid furnace pressure gas gas  in molten salt with gasfire and plasm

Thickness uniformity Base metal

Grinding lapping

lapping

bad

good

various steels same as the left nonmetal

lapping good

lapping good

lapping good

Iron, nickel alloy, iron copper alloy, same as and steel superal-loy and the left the like

lapping

lapping

lapping

better than PVD. worse than CVD.

bad

good

same as the left

same as the left

same as the left

Materials

same as various steels the left nonmetal

too bad various metals

Heat treatment method

Important points

Ion tufftriding (400∼570℃)

⃝Less deformation ⃝Glossy finished part should be polished again

Thermal refined alloyed tool steel

PVD treatment (400∼500℃)

Thermal refined 13Cr stainless steels

CVD treatment (800∼1200℃)

⃝Less deformation ⃝Abrasion resistant and release easy ⃝Glossy surface is coated strong ⃝Be careful to deformation ⃝Abrasion resistant, heat resistant and release easy ⃝Be careful to deformation

Structural alloyed steel

Overall quenching

Gas furnace Electric furnace Salt bath

⃝Much deformation ⃝Processing required after quen-ching

Partial quenching

Frame quenching Laser quenching

⃝Partial quenching is available

Preharden steel Maraging steel

Carbon tool steel Alloyed tool steel 13Cr stainless steels High-speed steel Quenching and surface treatment

too bad

cutting

⃝Less deformation ⃝Not suitable to glossy finish

Carbon tool steel

Quenching

good

cutting

required

Tufftriding with gas or salt bath (560∼580℃)

Structural alloyed steel

Surface treatment

lapping

required

Reference：KATA-GIJUTSU(1990.9)

■Relationships between Mold Materials and Heat Treatments Type

Building with molten metal with bars, gasfire of powder and arc.

close to the 60∼100 500∼600 600∼1000 800∼1100 400∼600 400∼600 (800∼1200) (800∼1100) 1000∼ melting point 500∼600 500∼650 500∼650 1100 of the steel ①②ditto ditto ditto ditto ditto ditto ditto ditto 500∼900 300∼900 ③200∼500 According to the size of ①100∼200 1∼5 1∼4 4∼8 1∼2 2∼4 0.3∼8 0.3∼8 article due to partial ②③1∼8 coating in small area 10∼20 20∼50 (compound layer) 50∼500 3∼15 1∼5 1∼5 3∼15 3∼15 500∼2000 2000∼5000 medium low medium high high low low high high high ∼high possible possible possible impossible possible possible possible impossible possible possible Reheating Reheating after Reheating together together Reheating before before before before after treatment after treatment treatment or after with the with the together or together with or together with plating plating plating plating treatment treatment the treatment the treatment with the treatment treatment

usually not usually not usually not usually not usually not usually not usually not usually not Necessity occasionally required required required required required required required required required Method

JIS B 0405(1991) JIS B 0419(1991)より抜粋

1. 削り加工寸法の普通許容差 JIS B 0405−1991

■Suface Treatments

Surface layer

加工寸法の普通許容差

Quenching the material with high tempering resitance till very hard

Vacuum quenching

⃝Higher abrasion resistance and pressure resistant strength ⃝Glossy finish can be maintained. ⃝Select air-cooling steel

⃝Most abrasion resistant Surface treatment after quenching ⃝Suitable to mass production and engineering plastic

面取り部分を除く長さ寸法に対する許容差

単位:mm

公差等級

記号

説明

基準寸法の区分 1) (  0.5  以上 3 以下

3 を超え 6 以下

06を超え 30以下

30を超え 120以下

120を超え 400以下

400を超え 1000以下

1000を超え 2000以下

2000を超え 4000以下

許容差 f

精級

±0.05

±0.05

±0.1

±0.15

±0.2

±0.3

±0.5

−

m

中級

±0.1

±0.1

±0.2

±0.3

±0.5

±0.8

±1.2

±2

c

粗級

±0.2

±0.3

±0.5

±0.8

±1.2

±2

±3

±4

v

極粗級

±0.5

±1

±1.5

±2.5

±4

±6

±8

−

注( 1 ) 0.5mm未満の基準寸法に対しては、その基準寸法に続けて許容差を個々に指示する。

2.  面取り部分の長さ寸法(かどの丸み及び かどの面取寸法)に対する許容差 単位:mm 公差等級

記号

説明

3.  角度寸法の許容差 単位:mm

基準寸法の区分 1) (  0.5  以上 3 以下

3 を超え 6 以下

公差等級

6  を超え  るもの

記号

説明

f

精級

m

中級

c

粗級

v

極粗級

許容差 f

精級

m

中級

c

粗級

v

極粗級

±0.2

±0.5

±0.4

±1

±1

±2

対象とする角度の短い方の辺の長さ（単位 mm）の区分 10以下

10 を超え 50 以下

50 を超え 120 以下

120 を超え 400 を超え 400 以下  るもの

許容差 ±1°

±30′

±20′

±10′

±  5′

±1°30′

± 1°

±30′

±15′

±10′

±3°

± 2°

± 1°

±30′

±20′

注( 1 ) 0.5mm未満の基準寸法に対しては、その基準寸法 に続けて許容差を個々に指示する。

4.  直角度の普通公差 JIS B 0419 −1991

単位:mm

短い方の辺の呼び長さの区分 公差等級

100以下

100 を超え 0300を超え 1000を超え 300 以下 1000以下 3000以下 直角度公差

H

0.2

0.3

0.4

0.5

K

0.4

0.6

0.8

1

L

0.6

1

1.5

2

5. 真直度及び平面度の普通公差  JIS B 0419−1991

単位:mm

呼び長さの区分 公差等級

10以下

10 を超え 30 以下

30 を超え 100 以下

100 を超え 0300を超え 1000を超え 300 以下 1000以下 3000以下

真直度公差及び平面度公差 H

0.02

0.05

0.1

0.2

0.3

0.4

K

0.05

0.1

0.2

0.4

0.6

0.8

L

0.1

0.2

0.4

0.8

1.2

1.6

技 術 デ ー タ

Reference：KATA-GIJUTSU （1989.10）

1119

1120