FIELD: heat treatment of parts, possibly in machine engineering industry branch for strengthening working surfaces of wheels of rolling stock and rails. SUBSTANCE: method comprises steps of heating parts by passing electric current through contact members forced to heat treated surface by pressure; cooling heating zone. Surface is heat treated along stripe zones inclined by 30-90 degrees relative to edge of part and having width 3-20 mm. Interstripe spacing is equal to 2-12 mm at ratio of areas of hardened and non-hardened portions being 1 : (0.3-4). Width of stripe may be varied along it. EFFECT: reduced inner stresses, controlled wear resistance of heat treated surface. 4 cl, 2 dwg, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR ELECTRIC-CONTACT HEAT TREATMENT OF PART SURFACES | 1999 |
|
RU2153008C1 |
| METHOD FOR ELECTRIC-CONTACT CASE HARDENING OF PARTS | 1999 |
|
RU2153007C1 |
| METHOD OF HARDENING OF PARTS FROM IRON-CARBON ALLOYS | 2000 |
|
RU2207384C2 |
| ELECTRICAL CONTACT APPLICATION OF COATINGS | 1993 |
|
RU2035278C1 |
| THERMAL PROCESSING OF RAIL HEAD WORKING SURFACE | 2013 |
|
RU2556257C2 |
| SURFACE HARDENING OF PARTS WEARING SURFACES | 2012 |
|
RU2534885C2 |
| FUSION PROCESS FOR STRENGTHENING CUTTING EDGE OF ARTICLE | 1997 |
|
RU2112634C1 |
| METHOD FOR HARDENING PARTS SURFACES WITH LOCAL ALTERNATION OF PROPERTIES | 2021 |
|
RU2779890C1 |
| METHOD OF MANUFACTURING POINT SWITCH TONGUES WITH USE OF INTERMEDIATE PART | 2016 |
|
RU2646006C1 |
| METHOD AND DEVICE FOR THERMAL PROCESSING OF WELDED RAIL CONNECTIONS | 2017 |
|
RU2667574C1 |
